Novatek-Electro OM-310 Documentation

Novatek-Electro OM-310 Documentation

https://www.overvis.com/docs/en/om-310/

2026-04-06

Table of Contents

1. 1. Novatek-Electro OM-310
2. 2. OM-310 Operating Manual
3. 3. Appendix A: Protection Curves
4. 4. Appendix B: Modbus Communication

Novatek-Electro OM-310 Documentation

Novatek-Electro OM-310 The OM-310 is a power limiter manufactured by NOVATEK-ELECTRO LTD. It is designed for load protection, power limiting, and monitoring of 3-phase electric circuits with comprehensive measurement and control capabilities. Complete Documentation Available View all documentation on a single page – Perfect for printing or offline reading Key Features Load protection at poor mains parameters Complete load cutoff when power exceeds main threshold Partial load cutoff when power exceeds additional threshold Measurement and indication of 3-phase circuit parameters: Delta and mesh voltage RMS values Phase sequence voltages (positive, negative, zero) Phase currents RMS values Active power, reactive power, apparent power Power factor (cos φ) Fault warning and diagnostics Remote control via RS-232/RS-485 interface or external switch Support for integrated current transformers (2.5–30 kW) Support for external current transformers (up to 350 kW) Protection Types Voltage surge protection Phase loss detection Incorrect phase sequence protection Phase/line voltage imbalance protection Maximum current protection Ground leakage current protection Common Use Cases Industrial power distribution protection Load management systems Equipment protection from power anomalies Energy monitoring and metering Documentation Operating Manual – Complete operating instructions, installation, and configuration Technical Reference Appendix A: Protection Curves – Dependent time delay current protection curves Appendix B: Modbus Communication – RS-485/RS-232 communication protocol and registers Support Knowledge Base: Browse this documentation for detailed guides and references Support Center: Visit our Support Center for FAQs and troubleshooting Report an Issue: Submit a support ticket for technical assistance

Novatek-Electro OM-310 Documentation

OM-310 Operating Manual NOVATEK-ELECTRO LTD Intelligent Industrial Electronics POWER LIMITER OM-310 OPERATING MANUAL Quality control system on the development and production complies with requirements ISO 9001:2015 Dear Customer, NOVATEK-ELECTRO Ltd. Company thanks you for purchasing our products. You will be able to use properly the device after carefully studying the Operating Manual. Store the Operating Manual throughout the service life of the device. Review the Operating manual before using the unit. Store the unit in the operating environment for 2 hours before switching to the mains. UKRAINE, Odesa — www.novatek-electro.com WARNING Review the Operating manual before using the unit. Store the unit in the operating environment for 2 hours before switching to the mains. Do not use abrasives or organic compounds for cleaning (spirit, gasoline, solvents, etc.). NEVER ATTEMPT TO REMOVE AND REPAIR THE UNIT. NEVER ATTEMPT TO OPERATE THE UNIT WITH THE MECHANICAL DAMAGE OF THE HOUSING. NEVER ATTEMPT TO OPERATE THE UNIT UNDER CONDITIONS OF HIGH HUMIDITY. DO NOT LET WATER INTO THE UNIT. This unit is safe for use in case of compliance with operating rules. OM-310 complies with requirements: EN 60947-1 EN 60947-6-2 EN 55011 EN 61000-4-2 No harmful substances in excess of the maximum permissible concentration is available. 1. Description and Operation 1.1 Application 1.1.1 OM-310 power limiter is designed for the following applications: Load protection at poor parameters of the mains Complete load cutoff in case if watts input exceeds the main threshold within the user-set time period Partial load cutoff in case if watts input exceeds the additional threshold within the user-set time period Measurement and indication of 3-phase electric circuit (delta voltage and mesh voltage RMS values; positive phase, negative phase and zero phase sequence voltages; phase currents RMS values; input wattage of active power, reactive power, apparent power, power factor (cos φ)) Fault warning Remote load on and off via RS-232/RS-485 interface or an external switch OM-310 provides for operation under loads ranging from 2.5 kW to 30 kW with use of integrated current transformers, and up to 350 kW at use of external current transformers, including when in networks with insulated neutral. OM-310 device provides the following types of load protection: When the mains voltage is of poor quality (impermissible voltage surges, phase loss, incorrect phase sequence and phase “coincidence”, phase/line voltage imbalance) When maximum specified current in any load phase is exceeded Against “ground” leakage currents For each separate type of protection, the unit allows to enable or disable automatic reset (AR). OM-310 provides electric equipment protection by means of a magnetic starter (contactor) coil control. Using OM-310 the user has possibility to choose functionality of additional relay and use it for following operations: Signalization of emergency situations Contactor connection of additional loading As time relay Signalization of reactive power excess Signalization of active power excess Communication OM-310 provides for: Control and parameters transfer via RS-485 interface according to MODBUS protocol Control and parameters transfer via RS-232 interface Note Simultaneous use of RS-485 and RS-232 is not possible. Interaction of PC and OM-310 is possible via “OM-310 Control Panel” Software that can be downloaded from the Novatek-Electro website www.novatek-electro.com. OM-310 Control Panel software is dedicated for monitoring status and retrieving data from OM-310 devices via standard communication interface (RS-232 or RS-485). The Software allows for saving (loading) various OM-310 settings, retrieving data and saving them for further research. The user can view saved data in a graph, while comparing parameters. The CP graphic environment allows for real-time viewing the current status of various OM-310 parameters. The flexible interface design allows tuning it to any user’s preferences. 1.1.2 OM-310 application limitations and proper selection of parameters 1.1.2.1 Use of integrated current transformers ATTENTION WHEN USING INTERNAL CT IN CASE OF THE CHOICE OF THE MAXIMUM POWER LOADINGS IT IS NECESSARY TO CONSIDER SATURATION OF THE CORE OF THE CT (TAKING INTO ACCOUNT THE POSSIBLE OVERLOAD). When measuring load currents from 63A to 300A, the measurement error does not exceed 5%, while at currents over 320A, the current transformer core saturation starts, and the measurement error increases rapidly. Regardless of the actual current value, the current measured by OM-310 will not exceed 400A. Setting up certain programmable parameters (maximum current protection) without regard to current transformers saturation will make protection tripping impossible. For example, at ind=50 (load rated current), i=P=0 (ratio of independent delay current protection), i=5=9 (maximum current protection tripping), the maximum current protection would have tripped at current value of 450A. Due to current transformer saturation, the measured current value will not exceed 380-400A, even in case of a short circuit from the load side, and currents of over 1000A, and, therefore, OM-310 will not de-energize the load. In such case (ind=50) the user shall set the overcurrent tripping ratio to not more than 6. 1.1.2.2 Use of external current transformers The rated current of the external standard current transformers must be no less than the rated load current. 1.1.4 List of abbreviations used AR – automatic reset MC – magnetic contactor PC – personal computer CT – current transformer MMSP – mode with minimal number of setting parameters Itt – rated current of CT (Specified when external CTs are used. For example, if a CT of T type-0.66 300/5, then Itt will equal 300A) In – rated current of load 1.2 Technical Brief 1.2.1 Basic technical parameters Table 1.1 – General Information Parameter Value Purpose of device Control and distribution equipment Assembly (mounting) type DIN-rail mounting Enclosure protection degree IP10 Climate zone version NF 3.1 Pollution degree III Overvoltage category III Wire cross section of adapters on terminals, mm² 0.5–2 Torque of terminal screws, Nm 0.4 Maximum diameter of wire when using internal current transformers, mm 12 Table 1.2 – Characterizing output terminals of relays Relay Type Max. current at U~ 250V Number of trips ×1000 Max switching power, VA Max sustained safe AC/DC voltage Max. current at U=30V DC Load relay (Cos φ = 0.4) 2 A 200 500 440/125 V 1.3 A Load relay (Cos φ = 1.0) 8 A 100 2000 440/125 V 1.3 A Characterizing relay (Cos φ = 0.4) 5 A 400 1250 440/125 V 3 A Characterizing relay (Cos φ = 1.0) 16 A 50 4000 440/125 V 3 A Table 1.3 – Basic Technical Parameters Parameter Value Rated supply voltage Three-phase 415V 50Hz Mains frequency, Hz 48–62 Rated load wattage range (integrated CTs), kW 3–30 Tripping threshold accuracy for wattage, % of rated ≤5 Tripping threshold accuracy for current, % of rated ≤2 Tripping threshold accuracy for voltage, V ≤3 Phase imbalance detection accuracy for voltage, V ≤3 Minimum operational voltage (single-phase, one phase + neutral), V ≥180 Minimum operational voltage (three-phase), V ≤450 Power consumption (under load), VA ≤5.0 Weight, kg ≤0.5 Case dimensions Nine S-type modules Mounting Standard 35 mm DIN-rail Mounting position Any Analog inputs: Remote switch connection input Three analog inputs for connecting standard CT with 5A output (of T-0.66 type or similar) Input for connecting differential current transformer (zero sequence transformer) Main outputs: Load relay – two groups of changeover contacts – 8A 250V cos φ=1 Characterizing relay – one group of changeover contacts – 16A 250V at cos φ=1 (the relay function is assigned by the user) 1.2.2 Measured and calculated parameters Measured and calculated parameters output to the display unit. Note The display unit includes: Two pieces of three-digit, seven segment indicators on OM-310 front panel PC connected to one of OM-310 interfaces (MODBUS, RS-232) Measured and displayed parameters, their effective range limits and tolerances are shown in Table 1.4 of Appendix B: Modbus Communication. 1.2.3 Programmable parameters Programmable parameters and their variability ranges are shown in Table 1.5 of Appendix B: Modbus Communication. 1.2.4 Operating controls and dimensions Front Panel Elements: Red LED SETUP – glows when the relay is in parameter setup mode Green LED LOAD – glows when the load relay is closed Green LED RELAY – glows when the characterizing relay is closed Green LED MMSP – glows when the relay is in MMSP mode (mode with minimal number of setting parameters) Three-digit parameter mnemonic indication display: Dot in lower case: OM-310 is in service engineer access mode Dot in middle case: setup parameter value is secured by service engineer password Dot in upper case: setup parameter is not included in the MMSP list Three-digit parameter value indication display Blue LED EXCHANGE – glows during data exchange with PC Red LED FAULT: While load relay is open: glows when OM-310 is in fault mode (flickers when AR after fault is possible) While load relay is closed: flickers when consumed input power is over the main threshold, but load relay open time has not yet been reached Plug connection for connecting OM-310 to PC via RS-232 Green LED – glows when characterizing relay works in the mode of controlling additional load Green LED TR – glows when characterizing relay functions in time relay mode; blinks when working in signalization mode of main tripping exceeding of active power Button ▲ (UP) – scroll through indicated parameters in view mode; scroll through menus in setup mode Button ▼ (DOWN) – scroll through indicated parameters in view mode; scroll through menus in setup mode Button RES/MEM/SEL – record parameters in setup mode; switch between groups of parameters in view mode; reset Button SETUP – engages the parameter setup mode Figure 1.1 – OM-310 device controls and dimensions Note LEDs 10 and 11 glow simultaneously when the OM-310 characterizing relay functions in the reactive power excess alarm mode. 1.2.5 Power Limiting Functions 1.2.5.1 Assumptions utilized in power limiter function description: a) Voltage and current protections are off or corresponding parameters values are within permissible limits b) When energized, the load relay will close after AR time (APd=1 parameter) c) Time specified by t1n parameter exceeds the AR time (Att parameter) 1.2.5.2 Limitation of active power if parameter rr5 ≠ 2 Under all relay activity conditions except using it for connection of additional loading: After OM-310 energizing, after AR time (Att parameter) the load relay will close. If during operation the active power consumed by the load crosses the main threshold for a time that is longer than assigned by t1n parameter, the load relay will open. The load will be energized again after AR period, or after time specified by t1F parameter (whichever is longer). The main threshold value and the power overload calculation depend on the rPn parameter value: When rPn=0: The load consumed wattage is calculated for each phase separately and is compared with the main threshold calculated as: Main threshold (kW) = (Pnn × P1F) / (100 × 3) Where: Pnn – cumulative rated load wattage, kW P1F – main threshold, % When rPn=1: The cumulative load power input for all three phases is compared with the main threshold calculated as: Main threshold (kW) = (Pnn × P1F) / 100 Simultaneously, the load input power is calculated for each phase separately and is compared with the second threshold (threshold calculation for each phase + 20%): Second threshold (kW) = (Pnn × P1F × 1.2) / (100 × 3) Watt consumption crossing the first and the second thresholds is considered crossing the main threshold. When rPn=2: The cumulative load power input is compared with the main threshold calculated as: Main threshold (kW) = (Pnn × P1F) / 100 Figure 1.2 – OM-310 operation in the power limiting mode when rr5=0, rr5=1, rr5=3 Where: Att – AR time t1n – time after which the load relay will open if the watts input crosses the main threshold t1F – time during which the load relay will be open after de-energizing resulting from the watts input crossing the main threshold 1.2.5.3 Active power limiting during operation of characterizing relay at rr5=2 When relay is used for connecting additional load: After OM-310 energizing, after AR time (Att parameter) the load relay will close. After the delay, defined by t12 or Att parameter (whichever time is longer), the characterizing relay closes while connecting additional load. If during operation the active power consumed by the load crosses the additional threshold for a time period that is longer than assigned by t2n parameter, the characterizing relay will open. Characterizing relay will re-close again: a) At r2r=0, after time assigned by t2F parameter b) At r2r=1, when load consumed power will reduce till the additional load power-on threshold (P2n) c) At r2r=2 depending on which event (a or b) comes first If during operation the active power consumed by the load crosses the main threshold for a time period that is longer than assigned by t1n parameter, the characterizing relay and the load relay will open. The load relay and characterizing relay will be re-closed after AR period, or after time specified by t1F parameter (whichever of the time periods is longer). Figure 1.3 – OM-310 operation in the power limiting mode when rr5=2 Where: 1 – main threshold (P1F parameter) 2 – additional de-energize threshold (P2F parameter) 3 – additional energize threshold (P2n parameter) The wattages values for the main threshold, the additional threshold, and the additional load energize threshold depend on the rPn parameter value. When rPn=0: The load consumed power is calculated for each phase separately and is compared with the thresholds calculated as: Main threshold (kW) = (Pnn × P1F) / (100 × 3) Additional threshold (kW) = (Pnn × P2F) / (100 × 3) When rPn=1: The main threshold, the additional threshold and the energizing threshold are calculated similarly to paragraph 1.2.5.2. When rPn=2: The thresholds values (kW) are defined as follows: Main threshold (kW) = Pnn × P1F / 100 Additional threshold (kW) = Pnn × P2F / 100 At any value of rPn, the additional load energizing threshold shall be determined as: Energizing threshold (kW) = (Pnn × P2n) / 100 Where P2n – additional load energizing threshold, % 1.2.6 Protection functions 1.2.6.1 Protection types OM-310 device provides the following types of load protection: Maximum phase current Against line-to-earth fault (based on zero sequence current) For minimum line voltage For maximum line voltage For line voltages imbalance (voltage negative sequence) For phase sequence order Starter unit operability control 1.2.6.2 The overcurrent protection parameters are assigned relatively to the rated load current In (ind parameter). 1.2.6.3 Overcurrent protection The overcurrent protection is of three-phase type. It is engaged when at least one of the phase current values reach the tripping threshold. The protection has a time delay setting. The delay can be independent (constant), or dependent: SIT – standard inverse (reverse dependent) VIT or LTI – very inverse (very reverse dependent) EIT – extremely inverse (extremely reverse dependent) UIT – ultra inverse (ultra reverse dependent) RI – type delay The tripping curves are displayed in Appendix A: Protection Curves. When independent time delay protection is activated, the load relay is de-energized if one of the phases current exceeds the threshold value within T period of time (parameter i=t). Is = i=5 (tripping ratio) × In (load rated current) T – protection tripping delay time Example: When i=5=4.0, In=10, i=t=10.0, the load relay shall open in 10 sec after one of the phase currents crosses 40 A value. Figure 1.4 – Principle of protection with an independent time delay The operation of the dependent time delay protection conforms to IEC 60255-3 and BS 142 standards. In corresponds to the ind setting (rated current of load) T (parameter i=t – protection function time constant) corresponds to the trip delay time for 10×In To deal with very high amperage currents the protection has a feature with an independent time delay. Figure 1.5 – Principle of protection with dependent time delay Graphs for the protection operation time constant equal to 1 sec (i=t parameter) are provided in Appendix A. When a different value for time constant is set, the protection trip time changes proportionally to the time constant (for example, at i=t=10 seconds the protection trip time at the same current ratio will increase 10 times). 1.2.6.4 Ground fault protection Is activated when earth fault current reaches the trip threshold (i_5 parameter) The load relay opens if the earth fault current crosses the trip threshold within T time period (i_t parameter) 1.2.6.5 Voltage based protection In voltage-based protections, before load energizing, OM-310 checks for corresponding threshold settings, and, depending on their value, either permits or prohibits load energization; after load energization the voltage control is retained. Voltage-based protections include: Protection for minimum line voltage – trips when at least one of the line voltages is less than the threshold setting (U_5 parameter) within time specified by U_t parameter Protection for maximum line voltage – trips when at least one of the line voltages is greater than the threshold setting (U¯5 parameter) within time specified by U¯t parameter Protection for line voltages imbalance – trips if difference between RMS line voltages exceeds the set threshold (Un5 parameter) within time assigned by Unt parameter 1.2.6.6 Phase sequence protection trips in case of phase sequence order fault or phase coincidence – it opens the load relay and locks its further operation. 1.2.6.7 Starter unit operability control (at CCi=1). If currents are present when the relay is open, the starter is considered faulty. Further OM-310 operation is locked. The alarm reset can be performed by de-energizing only. 1.3 Operating conditions The product is designed for operation in the following conditions: Ambient temperature: from −35 to +55°C Atmospheric pressure: from 84 to 106.7 kPa Relative air humidity (at temperature of +25°C): 30–80% 1.4 Product package contents Table 1.7 – Product package contents Description Abbreviation OM-310 OM-310 Differential current transformer (zero sequence transformer)* — Cable for communication with PC via RS-232* KC-01 * Supplied optionally 1.5 Equipment features and operation OM-310 is a microprocessor-based digital device that provides a high degree of reliability and accuracy. The device doesn’t need any auxiliary supply: it’s self-powered by the voltage to be monitored. OM-310 device is equipped with three built-in CTs, through which power phase mains are conducted. 2. Intended Use 2.1 Safety WARNING All connections must be performed on dead device. NEVER ATTEMPT TO REMOVE AND REPAIR THE UNIT. Some of the unit components may be live. NEVER ATTEMPT TO OPERATE THE UNIT WITH THE MECHANICAL DAMAGE OF THE HOUSING. DO NOT LET WATER INTO THE UNIT. Do not use abrasives or organic compounds for cleaning (spirit, gasoline, solvents, etc.). This unit is safe for use in case of compliance with operating rules. 2.2 OM-310 device control 2.2.1 Control Modes OM-310 has five control modes: Keyboard lock level Mode with minimal number of setting parameters (MMSP) User level Service engineer level Remote control In all operation modes the following features are available: Viewing measured and displayed parameters (Table 1.4). Scrolling through parameters list is performed by DOWN and UP buttons Faults log view (see section 2.4.8) ATTENTION OM-310 IS SUPPLIED WITH SET MODE OF MINIMUM SETTINGS QUANTITY. TO CHANGE THE PARAMETER, IT IS NECESSARY IN THE SERVICEMAN MODE TO REMOVE THE PARAMETER FROM THE LIST OF MINIMUM SETTINGS (section 2.2.5). 2.2.2 Disabled keypad mode When keypad is locked, viewing and resetting programmable parameters is not possible. When keypad is locked, pushing SETUP button will result in LOC message display. To unlock the keyboard: Press the SETUP button again The “SETUP” LED lights up, and figure “0” is blinking on the indicator With the UP and DOWN buttons enter a password digit from 1 to 9 Press the RES/MEM/SEL button If the password is correct, the keypad will be unlocked. If after the keypad was unlocked no button is pressed during 15 sec and the lockage setting is not released by user, the keypad will relock. The unblocked keypad allows: To operate in MMSP mode To change and to view the user level parameters To view the service engineer level parameters 2.2.3 MMSP – mode with minimum number of setting parameters MMSP is devised to ease the service personnel’s operations with OM-310. To employ MMSP mode in OM-310, the user needs to set 5in=1 parameter, or perform resetting to factory settings. When OM-310 is in this operation mode, green LED “MMSP” is on. In MMSP for normal activity of OM-310 it is enough to fix parameter Pnn (nominal active power). If necessary, also parameters t1n (time before loading relay will be switched OFF after energy input exceeding main threshold) and t1F (time interval of cut off loading relay on energy input exceeding main threshold). On duty of external CT it is necessary to fix following parameters: Type of CT (parameter tPt) – external Nominal current of CT (parameter tnt) The difference between MMSP mode and the user mode is that the parameters not included in the MMSP register are set to default factory values. ATTENTION If some programmable parameters have been modified by the user or service engineer, but not included in the MMSP register, switching to MMSP mode will reset such parameters to factory settings. The parameters included in this register cannot be viewed or modified. Operations with the MMSP register parameters are similar to the user level operations. Adding parameters to the MMSP register and MMSP mode disabling is possible only in service engineer access mode. When switching off the MMSP mode (setting parameter 5in=0) LED “MMSP” goes off. In the user mode all parameters list is displayed. 2.2.4 User level To view and to change the user level parameters: Press the SETUP button – “SETUP” LED will glow Scroll parameters with DOWN and UP buttons Enter parameter change mode – press SETUP button again (the parameter value starts to flicker) Change parameters with DOWN and UP buttons Record parameter – press RES/MEM/SEL To return to menu without change – press SETUP button again If no button is pressed during 30 sec the OM-310 will transfer to the initial state. If a parameter change is forbidden (a dot in the middle digit field of the parameter mnemonic indicator glows), then the parameter change is possible only in Service Engineer level after the prohibition has been released. 2.2.5 Service Engineer Level Access to the Service Engineer level: Push SETUP button and hold for 5 sec If the level is protected by a password, the label PAS appears on the indicator The “SETUP” LED lights up, and indication “000” flickers on the parameter value indicator With the UP and DOWN buttons enter the three-digit service engineer password, digits from 1 to 9, and separate dialing with pressing the RES/MEM/SEL button If the password is incorrect, the PAS label lights on blinking in the higher position of the value indicator, and OM-310 goes back to the initial state after 15 sec. Otherwise the first parameter of the service engineer menu appears on the indicator. Scroll parameters with DOWN and UP buttons, enter parameter change mode – press SETUP button (the parameter value starts to flicker), change parameters – with DOWN and UP buttons, record parameter – RES/MEM/SEL, to return to menu without change – press SETUP button again. If no button is pressed during 30 sec the OM-310 will transfer to the initial state. While OM-310 is in Service Engineer mode, the decimal point in the lower digit position of the mnemonic indicator is on. In the Service Engineer level the access to any user level parameter can be prohibited or permitted by simultaneous pressing the SET and DOWN buttons. Access denial is indicated by decimal point in the middle digit position of the mnemonic indicator. Adding parameters to MMSP register (while in Service Engineer access mode): With DOWN and UP buttons choose the parameter to be added Push buttons DOWN and UP simultaneously Excluding a parameter from the MMSP register: With DOWN and UP buttons choose the parameter to be excluded Push buttons DOWN and UP simultaneously When a parameter is excluded from the MMSP mode register, a decimal point glows in the higher digit position of the mnemonic indicator. 2.2.6 Restoring factory settings There are two ways to restore the factory settings. Way 1: Set up parameter PPP=1. Upon exit from the parameter setup mode all factory settings will be restored (except the Service Engineer Password). Way 2: When powering OM-310 on, hold down SETUP and RES/MEM/SEL buttons for 2 seconds. All factory settings including the Service Engineer password will be restored (Service Engineer password – 123). After completion of the factory settings setup, OM-310 will start operation in MMSP mode, which includes the following parameters: CT type (external or integral): tPt CT rated current (set in case of external CT): tnt Rated power of load: Pnn 2.3 OM-310 pre-operation procedure WARNING OM-310 IS NOT INTENDED FOR SWITCHING THE LOAD AT SHORT CIRCUIT. THEREFORE, IN THE POWER SUPPLY CIRCUIT FOR OUTPUT CONTACTS OF THE LOAD RELAY, THE AUTOMATIC CIRCUIT BREAKERS (FUSES) OR THEIR ANALOGUES SHOULD BE INSTALLED. The nominal value is chosen in accordance with the connected circuits, but it should not exceed 15 A for contacts 1, 2, 3, and 6.3 A for contacts 4-9. To improve the performance, it is recommended to install fuses (fuse links or their analogs) in the following circuits: OM-310 power supply circuits (27, 28, 30, 31 - L1, L2, L3, N) – 1 A Remote control circuits (51, 52), RS-485 (33, 34, 35) – 0.5 A 2.3.1 When operating with load power ranging from 3 kW to 30 kW, use of built-in current transformers is allowed. The mains leading to the load must be conducted through openings in OM-310 casing (each phase wire uses a separate opening). When using other capacity loads, current transformers with 5A rated output current shall be connected. For correct OM-310 operation, the current transformers’ polarity must be observed. Figure 2.1 – OM-310 connection schematic with use of external CTs and at rr5=2 (characterizing relay operation in the mode of controlling additional load) Where: S1 – remote switch AS – automatic switch MC1 – additional load magnetic contactor MC2 – main load magnetic contactor K1 relay – load relay K2 relay – characterizing relay T1-T3 – external CTs T4 – differential current transformer 2.3.2 Run all three power phase cables through differential current transformer (zero sequence transformer) and connect the DCT to OM-310. 2.3.3 Connect OM-310 to power mains in accordance with Figure 2.1. 2.3.4 To operate OM-310 via PC as control or monitoring device with use of “OM-310 Control Panel” software: Install “OM-310 Control Panel” software to your PC by running software “Setup_cpl_pl310(XX).exe”, where XX – program version number Connect PC connection plug on OM-310 front panel to RS-232 plug on PC with use of KC-01 cable Set parameter rPP=1 Note “Setup_cpl_pl310(XX).exe” software can be downloaded from Novatek-Electro website (http://www.novatek-electro.com/production_ubz.htm) KC-01 cable is optional and can be ordered separately. Users can make KC-01 cable themselves following the diagram shown in Figure 2.2 Custom-developed software can also be used to operate OM-310 2.3.5 When using MODBUS, connect communication lines to terminals 33, 34, 35 of OM-310. Set rPP=2 parameter. 2.3.6 Energize OM-310. Note OM-310 is supplied with rated load power set equal to zero. In this case the OM-310 load relay will not close before the rated load power is set up. Load relay closing sequence is controlled by APd and ACd parameter values. 2.3.7 Set up required parameter values in the menu. 2.3.8 De-energize OM-310. 2.3.9 Connect the load magnetic contactor (MC) according to Figure 2.1. Note When the load relay is energized, contacts 5-6 and 8-9 are closed. When the relay is de-energized, contacts 4-5 and 7-8 are closed. 2.4 Intended Use Note In the OM-310 operation description, it is assumed that the protections described are enabled and all necessary sensors are connected. 2.4.1 OM-310 operation before load relay closure 2.4.1.1 OM-310 operation after power-on (first start) After power-on, the mnemonic indicator displays 5tA for 1-2 seconds, and then before load energizing OM-310 tests: Mains voltage quality: whether voltage is present on all three phases, if the mains voltage is symmetrical, what the RMS line voltage value is Correct phase sequence, absence of phase fritting When any of inhibiting factors is present, the load relay is not closed, and on the mnemonics indicator FAULT LED glows. Depending on the 5iP parameter, the indicator displays: Line voltage UAb at 5iP=0 Active power (PoA) at 5iP=1 AR time countdown in seconds (Att) at 5iP=2 When power-on inhibiting factors are not present, the load relay closure is defined by APd parameter value (OM-310 device operation after power-on): At APd=0 the load relay will not close. To close load relay in this case, both DOWN and UP buttons have to be pressed simultaneously When APd=1 the load relay will close after AR time When APd=2 the load relay will close in 2 sec after power-on Simultaneously with the load relay closure, green LED LOAD starts to glow. OM-310 operation with remote control permitted via RS-232/RS-485 (dUd=1, dUd=2) is covered in section 2.4.5. OM-310 operation with remote control permitted via switch (dUc=1, dUc=2) is covered in section 2.4.6. 2.4.1.2 OM-310 operation after a fault-caused de-energizing The OM-310 device operation in such case is similar to the first start operation, but the load relay closure is not dependent on the APd parameter value. If after a fault AR is prohibited (Arr=0), the load power-on is not possible before OM-310 de-energizing. Arr parameter value is effective for all types of faults except voltage faults. i=r, U_r, U¯r, Unr parameters shall be used to prohibit AR in case of voltage faults. 2.4.1.3 OM-310 operation after de-energizing tripping caused by exceeding the watt input OM-310 operation in this case is covered under section 1.2.5. 2.4.2 OM-310 operation after load relay closure After load relay closure OM-310 performs the following: Control and limiting the active and reactive power by input load wattage (section 1.2.5) Current overload protection (section 1.2.6.3) Protection against line-to-earth fault (section 1.2.6.4) Voltage protection (maximum, minimum, phase imbalance) (section 1.2.6.5) Starter unit operability control (section 1.2.6.7) The indicator can display either phase A current or a user-selected parameter value. The value of the user-selected parameter can be displayed either constantly (5iC=0), or within 15 sec, and then phase A current (5iC=1) indication is displayed again. 2.4.3 Characterizing relay operation Functions performed by the characterizing relay are defined by rr5 parameter. When rr5=0: The relay functions as signaling alarm relay (EXTRA LOAD and TIME RELAY LEDs are off). The relay contacts are closed in case of any fault specified in Table 2.8. When rr5=1: The relay functions as time relay (TR LED glows). The relay closes upon expiration of time set by t12 parameter, after load relay closing. When rr5=2: The relay is used to control switching additional load (EXTRA LOAD LED glows) (see section 1.2.5.3). When rr5=3: The relay is used for reactive power excess signalization (LEDs EXTRA LOAD and TIME RELAY are on). Functional relay is switched ON by exceeding total reactive power across three phases – Prn (admissible reactive power of loading) and switched OFF if not exceeded. When rr5=4: The relay is used for active power main threshold excess signalization (LED is blinking). The threshold value is being calculated according to section 1.2.5.2. Note When the characterizing relay is closed, contacts 1-2 are open, and contacts 2-3 are closed. 2.4.4 Work with RS-232/RS-485 interface under MODBUS protocol in RTU mode The OM-310 allows for data exchange with an external device via serial interface under MODBUS protocol. During data exchange via RS-485 or RS-232 blue LED “EXCHANGE” glows. 2.4.4.1 Communication parameters: Device address: 1–247 (r5A parameter) Data transfer rate: 9600 baud, 19200 baud (r55 parameter) Response to loss of carrier: warning and continue operation, warning and load de-energizing, continue operation without warning (r5P parameter) Response timeout detection: 1 sec – 120 sec (r50 parameter) Transmission word format: 8 bit, no parity check, two stop bits 2.4.4.2 OM-310 control from PC Communication between PC and OM-310 is effected through serial interface. Each OM-310 has a unique communication address. PC controls each OM recognizing them by their address. OM-310 can operate within RTU mode controlled Modbus networks. Figure 2.2 – OM-310 connection to PC schematic 2.4.4.3 Communication protocol The exchange between PC and OM-310 uses Modbus protocol. The data formats and parameters addresses are given in Appendix B: Modbus Communication. 2.4.4.8 Energy meters reset Reset of energy meters (total, at all phases) is performed when setting the parameter “1” to register 239, when using RS-232/RS-485 interface. After reset of energy meters, OM-310 will automatically switch register 239 to parameter “0”. 2.4.5 Load energize/de-energize remote control via RS-232/RS-485 interface OM-310 operation in the remote control mode is defined by the dUd parameter. When dUd=0: The load energize/de-energize remote control is prohibited. When dUd=1: The OM-310 device after power-on works similarly as when the remote control is off (normal operation), but writing to the R_COMMAND command register is permitted. When dUd=2: OM-310 will energize load only after the corresponding command via RS-232/RS-485 has been received. The R_COMMAND register address and allowed values are given in Appendix B: Modbus Communication. 2.4.6 Load energize/de-energize via remote breaker OM-310 operation in the remote control mode is defined by the dUc parameter. When dUc=0: Load energize/cutoff by means of remote breaker is prohibited. When dUc=1: OM-310 with the open terminal of the S1 remote breaker functions same as during normal operation mode. When the remote breaker terminal is closed, the load relay opens (when rr5=2, the characterizing relay will also open). When dUc=2: OM-310 with the closed terminal of the S1 remote breaker functions same as during normal device operation. When the remote breaker terminal is open, the load relay opens (when rr5=2, the characterizing relay will also open). When dUc=3 and dUc=4: OM-310 functions same as dUc=1 and dUc=2 accordingly, but AR after the remote motor de-energizing is forbidden. 2.4.7 Fault conditions system In case of fault condition occurrence, the OM-310 performs following actions: Mnemonic indicator displays error code according to Table 2.8 Value indicator displays value of the faulty parameter (if given fault does not have numeric value, the indicator displays ”----”) Red LED FAULT lights (glows continuously if AR will not initiate, and flickers if AR is expected) Load relay opens Characterizing relay closes (when rr5=0) If OM-310 defines several types of faults simultaneously, the error codes and parameter values are displayed consecutively, one after one. If AR is permitted, the fault codes and time left till AR are displayed. Fault codes mnemonics, register flags and values are shown in Table 2.8 of Appendix B: Modbus Communication. 2.4.8 Fault conditions log When load relay in case of fault opens, the OM-310 device stores the fault code, the parameter value, and time of occurrence. Note Time of fault is defined by OM internal clock. As OM-310 has no integral power source, the time when the device was de-energized is not accounted. Number of synchronously stored fault codes is five. When next following faults occur, the information of this fault is recorded over the latest fault. To view log press RES/MEM/SEL button. ATTENTION The occurrence of EEP alarm (EEPROM destruction) means that the data of the programmable parameters (Table 1.5) is destructed. To continue the operation, it is necessary to turn off OM-310 and restore the factory settings (section 2.2.6 - the second method). The SETUP LED will start to flicker, and the OM-310 indicator panels will display line 1 from Table 2.9. Log scrolling performed by pressing UP and DOWN buttons. To exit log view mode press RES/MEM/SEL button, or the log will close automatically after 30 sec since last button was pressed. Table 2.9 – Fault log display Mnemonic indicator Value indicator LOG Number of log record (1 = latest record) XXX – fault mnemonic YYY – parameter value (if negative, ”----” is displayed) XXX – hours since fault YY – minutes since fault occurrence Fault log registers are shown in Appendix B: Modbus Communication. 2.4.9 Load start/cutoff control with use of OM-310 front panel Depending on the ACd parameter value, the OM-310 load relay can be controlled by pressing buttons UP and DOWN simultaneously (unless OM-310 is in keypad lock-up mode): ACd=0 – no response ACd=1 (load energizing permitted) – load relay will close, if AR time has not expired ACd=2 (emergency load de-energize) – load relay will open and produce EAd fault code. Load restart is possible after disconnecting and re-connecting power to OM-310 ACd=3 (load energizing and de-energizing permitted) – load relay will open and produce EOd fault code. To close, press UP and DOWN buttons again Note When parameters APd=0 (after power-on, load is energized manually via OM-310 control panel) and ACd=0 (load energizing manual control forbidden) are selected, the load relay will not close. 3. Maintenance 3.1 Safety WARNING Installation, adjustment and maintenance of the unit should only be provided by the qualified personnel, having reviewed this Operating manual. During maintenance operations, OM-310 power supply must be disconnected. 3.2 Maintenance schedule Recommended maintenance schedule – semiannually. Maintenance scheduled operations consist of visual observation, during which wiring connection to OM-310 terminals is checked, casing integrity check for cracking and chipping. 4. Transportation and Storage OM-310 in manufacturer package should be stored in enclosed rooms at −45° to +60°C and exposed to no more than 80% of relative humidity when there are no fumes in the air that have a damaging effect on package and the equipment material. The customer shall provide for the OM-310 equipment protection against mechanical damage while in transport. 5. Period of Service, Storage, and Manufacturer’s Warranty The unit service life is 10 years. Upon expiration of the service life you should contact the Manufacturer. Shelf life is 3 years. Warranty period of the unit operation is 5 years from the date of sale. During the warranty period the Manufacturer is responsible for free repair of the unit, if the Consumer has complied with the requirements of this Operating Manual. ATTENTION IF THE UNIT HAS BEEN OPERATED WITH VIOLATION OF THE REQUIREMENTS OF THIS OPERATION MANUAL, BUYER WILL FORFEIT THE RIGHT TO WARRANTY SERVICE. Warranty service is performed at the place of purchase or by the Manufacturer of the product. Post-warranty service is performed by the Manufacturer at current rates. Before sending for repair, the unit should be packed in the original or other packaging excluding mechanical damage. Contact Information: NOVATEK-ELECTRO Ltd. www.novatek-electro.com 59, Mykhailo Boltenko (Admiral Lazarev) str., Odesa, Ukraine, 65007 Tel: +38 (067) 565 37 68 Tel: +38 (050) 359 39 11 Tel: +38 (063) 301 30 40

Novatek-Electro OM-310 Documentation

Appendix A: Protection Curves Dependent Time Delay Current Protection Types The following curves show the relationship between current ratio (I/In) and trip time for different protection curve types when the time constant parameter it = 1 second. When a different value for time constant is set, the protection trip time changes proportionally to the time constant. For example, at it = 10 seconds, the protection trip time at the same current ratio will increase 10 times. Protection Curve Types Type Description Standard SIT Standard Inverse Time IEC 60255-3 / BS 142 VIT (LTI) Very Inverse Time (Long Time Inverse) IEC 60255-3 / BS 142 EIT Extremely Inverse Time IEC 60255-3 / BS 142 UIT Ultra Inverse Time IEC 60255-3 / BS 142 RI RI Type IEC 60255-3 / BS 142 Protection Curves Curve Formulas The operation of the dependent time delay protection conforms to IEC 60255-3 and BS 142 standards. Standard Inverse Time (SIT): $t = \frac{0.14 \times T}{(I/I_n)^{0.02} - 1}$ Very Inverse Time (VIT/LTI): $t = \frac{13.5 \times T}{(I/I_n) - 1}$ Extremely Inverse Time (EIT): $t = \frac{80 \times T}{(I/I_n)^2 - 1}$ Ultra Inverse Time (UIT): $t = \frac{315.2 \times T}{(I/I_n)^{2.5} - 1}$ Where: t = trip time in seconds T = time constant (parameter it) I = measured current In = rated current (parameter In) Usage Notes Select the appropriate curve type using parameter iP: 0 = Independent time delay (constant) 1 = SIT (Standard Inverse Time) 2 = VIT/LTI (Very Inverse Time) 3 = EIT (Extremely Inverse Time) 4 = UIT (Ultra Inverse Time) 5 = RI Type The time constant it corresponds to the trip delay time for 10×In To deal with very high amperage currents, the protection has a feature with an independent time delay

Novatek-Electro OM-310 Documentation

Appendix B: Modbus Communication Communication protocol The exchange between PC and OM-310 is effected via data packages. Data packet format (Table 2.1) Field Description START Silence interval – over 2 ms at 9600 baud, or over 4 ms at 19200 baud ADDRESS ID OM-310 communication address (8 bit) FUNCTION Command code (8 bit) DATA 0 … DATA (n-1) Data contents: N×8 data bit (n≤24) CRC CHK low CRC checksum (16 bits) – low byte CRC CHK high CRC checksum (16 bits) – high byte END Silence interval – over 2 ms at 9600 baud, or over 2 ms at 19200 baud CMD (command code) and DATA (data symbols) Data symbols format depends on command codes. Command code 0x03 – n-words read Example: Read 2 continuous words from address 0x64 (100) in OM-310 with communication address 0x01. Command message Response message ADDRESS ID 0x01 ADR 0x01 FUNCTION 0x03 CMD 0x03 Start data address 0x00, 0x64 Data amount, bytes 0x04 Data amount in words 0x00, 0x02 Data contents 0x17, 0x70 CRC CHK low 0x85 Data contents 0x00, 0x00 CRC CHK high 0xD4 CRC CHK low 0xFE CRC CHK high 0x5C Command code 0x06 – write (record) one word WARNING Using this command is not recommended as writing incorrect data may lead to OM-310 failure. Data writing is possible only to the programmable parameter’s addresses (Table 1.5), except for the following parameters: Parameter Code Address Equipment operation time counter, days tbU 191 User access code LOC 192 Service engineer access code PA5 193 System reset to factory settings PPP 194 Device version rEL 200 Parameter writing is performed independently from the installed Service Engineer protection (the entry made via communication line has a higher priority). When a new parameter value is written into a MMSP-protected cell, such parameter will automatically be excluded from this mode. Command code 0x08 – diagnostics 0x08 function provides a number of tests for checking communication system between PC and OM-310, and for OM-310 integrity control. The function uses the sub function field to specify the action performed (test). Sub function 0x00 – query data response Data transferred in the query field must return in the response data field. Example: sub function 0x00 request and response in OM-310 with communication address 0x01. Command message Response message ADDRESS ID 0x01 ADR 0x01 FUNCTION 0x08 CMD 0x08 Subfunction 0x00, 0x00 Subfunction 0x00, 0x00 Data 0xA0, 0x3C Data 0xA0, 0x3C CRC CHK low 0x98 CRC CHK low 0x98 CRC CHK high 0x1A CRC CHK high 0x1A Sub function 0x01 – communication options restart OM-310 peripheral port shall be initialized and restarted. Example: sub function 0x01 request (response is not returned) for OM-310 with communication address 0x01. Command message ADDRESS ID 0x01 FUNCTION 0x08 Subfunction 0x00, 0x01 Data 0x00, 0x00 CRC CHK low 0xB1 CRC CHK high 0xCB CRC – Cyclic redundancy check code The checksum (CRC16) is a cyclic redundancy check code based on 0xA001 polynomial. The transmitting device forms the checksum for all bytes of the message transmitted. The receiving device similarly forms the checksum for all bytes of the message received, and compares it to the checksum received from the transmission device. When received and transmitted checksums do not match, an error message is generated. The checksum field size occupies two bytes. The checksum within message is transferred with low byte coming first. The checksum is registered under the following algorithm: Load CRC register (16 bit) with units (0xFFFF) Exclusive OR with first 8 bytes of message and CRC register contents Offset the result one bit to the right If the offset bit = 1, the exclusive OR of the register contents with 0xA001 value If the offset bit = 0, repeat step 3 Repeat steps 3, 4, 5 until 8 offsets have been completed Exclusive OR with the next 8 bits of the message byte and CRC register contents Repeat steps 3–7 until all bytes of the message have been processed The finite register contents will contain the checksum CRC code generation example in C: unsigned int crc_chk(unsigned char* data, unsigned char length) { int j; unsigned int reg_crc = 0xFFFF; while(length--) { reg_crc ^= *data++; for(j = 0; j < 8; j++) { if(reg_crc & 0x01) reg_crc = (reg_crc >> 1) ^ 0xA001; // LSB(b0)=1 else reg_crc = reg_crc >> 1; } } return reg_crc; } Communication error handling When an error situation occurs at time of a frame receipt (parity error, frame error, checksum error), the OM-310 device does not return a response. When an error occurs in the format or in the value of the data transferred (unsupported function code, etc.), OM-310 receives the request frame and forms a response with the error indicator and code. A high-order function field bit inserted in the unit serves as error indicator. Example: function 0x30 error response (illegal function) from OM-310 with communication address 0x01. Command message Response message ADDRESS ID 0x01 ADR 0x01 FUNCTION 0x30 FUNCTION ERROR 0xB0 DATA … Error code 0x01 CRC CHK low … CRC CHK low 0x94 CRC CHK high … CRC CHK high 0x00 Table 2.6 – Error codes Error code Title Description 0x01 ILLEGAL FUNCTION Function code received cannot be processed by OM-310 0x02 ILLEGAL DATA ADDRESS Data address in the query is not accessible by the given subordinate 0x03 ILLEGAL DATA VALUE Value contained in the request data field is not a valid value for OM-310 0x04 SLAVE DEVICE FAILURE While OM-310 attempted to perform the requested action, an unrecoverable error occurred 0x05 ACKNOWLEDGE OM-310 accepted request and is processing it, but it requires a long time 0x06 SLAVE DEVICE BUSY OM-310 is busy with command processing. Master must repeat message later 0x07 NEGATIVE ACKNOWLEDGE OM-310 cannot perform the program function received in the request Measured and Displayed Parameters (Table 1.4) Currents Measurement function Range Accuracy Mnemonics Address Units Phase currents RMS (built-in CT) 0.5–100 2% iF1, iF2, iF3 100, 101, 102 1/10 A Phase currents RMS (built-in CT) 100–300 5% iF1, iF2, iF3 100, 101, 102 1/10 A Phase currents RMS (external CT) 5–999 2% iF1, iF2, iF3 100, 101, 102 1/10 A Zero sequence current RMS, A 0.3–9.9 2% iF0 103 1/10 A Average current value per phase — — iS1, iS2, iS3 104, 105, 106 1/10 A Max average current value per phase <3 Itt 2% in1, in2, in3 107, 108, 109 1/10 A Max average current value per phase >3 Itt 10% in1, in2, in3 107, 108, 109 1/10 A Negative sequence current (imbalance), A 0.2–200 5% ioP 110 1/10 A Note All average values can be reset with RES/MEM/SEL button at time of max average current value output for any phase (real-time average current value for corresponding phase is assigned). Voltages Measurement function Range Accuracy Mnemonics Address Units Phase voltages RMS (with zero wire), V 100–300 3 V UF1, UF2, UF3 111, 112, 113 Volts Line voltage RMS values, V 100–450 5 V UL1, UL2, UL3 114, 115, 116 Volts Positive-sequence voltage, V 100–300 3 V UPP 117 Volts Negative-sequence voltage, V 3–300 3 V UoP 118 Volts Zero-sequence voltage, V 3–100 3 V UnP 119 Volts Note Zero-sequence voltage (vector sum of three phase voltages, divided by three) measurement is possible only when zero wire is connected to OM-310. Power and Cosines Measurement function Range Accuracy Mnemonics Address Units Gross power, kVA 0–5000 5% Pot 120, 121 W × 10 Active power, kW 0–5000 5% PoR 122, 123 W × 10 Reactive power, kVAr 0–5000 5% PoJ 124, 125 W × 10 Phase L1 active power, kW 0–5000 5% PAR 126, 127 W × 10 Phase L2 active power, kW 0–5000 5% PAb 128, 129 W × 10 Phase L3 active power, kW 0–5000 5% PAC 130, 131 W × 10 Phase L1 cos φ 0.00–1.00 5% PCA 132 ×1000 Phase L2 cos φ 0.00–1.00 5% PCb 133 ×1000 Phase L3 cos φ 0.00–1.00 5% PCC 134 ×1000 Note If power consumed by the load is over 999 kW (kVA, kVAr), then MW (MVA, MVAr) is displayed on screen with a “п”-shaped point in the middle position. For instance, if the display shows “3п4”, it means 3.4 MW (MVA, MVAr). Timers and Frequency Measurement function Range Accuracy Mnemonics Address Units Time before load disconnect (power exceeded), sec 0–600 1s tOP 135 seconds Time before AR delay termination, sec 0–900 1s tAP 136 seconds Wait time after de-energizing (over wattage), min 0–30 1s ttP 137 seconds Mains frequency, Hz 45–65 1% FFF 138 1/10 Hz Note If the time is not defined, ”---” is displayed on screen If automatic reset is forbidden, “not” message is displayed Energy Meters Measurement function Range Accuracy Address Units Active electric power, phase L1, kWh 0–200,000,000 5% 90, 91 100s of Wh Active electric power, phase L2, kWh 0–200,000,000 5% 92, 93 100s of Wh Active electric power, phase L3, kWh 0–200,000,000 5% 94, 95 100s of Wh Note When working with external transformers of rated current over 100A, the currents (measured and calculated), except for the zero sequence current (ground fault) are transferred via RS-232/RS-485 in amperes In excess of the energy meter value 200,000,000, the counter is reset and energy metering will start from zero Recording the current values of the energy in the non-volatile memory is performed every 15 min Programmable Parameters (Table 1.5) Transformers Parameter Code Min Max Default Description Address CT in use tPt 0 1 0 0 = integrated CT, 1 = external CT 150 CT rated current, A tnt 20 800 100 For external CT 151 Load rated current, A ind 5 700 10 Used for calculating current and time of overcurrent protection 152 Power Control Parameter Code Min Max Default Description Address Rated power of load, kW Pnn 3 450 5 — 153 Power limiter threshold calculation rPn 0 2 0 0 = per phase (Pnn/3), 1 = per phase +20%, 2 = aggregate 154 Main threshold, % P1F 50 150 110 — 155 Additional threshold, % P2F 30 100 90 — 156 Time before load relay de-energizing (main), sec t1n 0 300 60 Time before load disconnect when main threshold exceeded 157 Time while load relay is open (main), min t1F 1 60 5 Time relay stays open after main threshold trip 158 Time before characterizing relay de-energizing, sec t2n 0 300 10 Additional threshold delay 159 Time while characterizing relay is open, min t2F 1 60 5 Time relay stays open after additional threshold trip 160 Additional threshold for characterizing relay closure, % P2n 3 100 30 Threshold for relay closure after overload 161 Characterizing relay operation mode rr5 0 4 0 0=alarm, 1=time relay, 2=additional load, 3=reactive power alarm, 4=active power alarm 162 Characterizing relay activation mode (when rr5=2) r2r 0 2 0 0=after time t2F, 1=after power reduction, 2=first event 163 Delay of characterizing relay closure, sec t12 0 300 5 Relative to load relay closure 164 Allowable load wattless power, kVAr Prn 3 450 5 — 165 Current Protection - Maximum Current Parameter Code Min Max Default Description Address Maximum current protection type i=P 0 5 0 0=independent, 1=SIT, 2=VIT, 3=EIT, 4=UIT, 5=RI 166 Max current protection tripping ratio i=5 0.8 9.0 2.0 Ratio to load rated current (when i=P=0) 167 Current protection tripping delay, sec i=t 0.3 600 10.0 — 168 Protection function permission i=r 0 2 0 0=prohibited, 1=permitted (no AR), 2=permitted (with AR) 169 Current Protection - Ground Fault (iF0) Parameter Code Min Max Default Description Address Current fault tripping setting, A i_5 0.3 5.0 0.5 — 170 Protection tripping delay, sec i_t 0.3 2.0 1.0 — 171 Protection function permission i_r 0 2 0 0=prohibited, 1=permitted (no AR), 2=permitted (with AR) 172 Voltage Protection Parameter Code Min Max Default Description Address Minimum line voltage, V U_5 270 415 320 — 173 Min voltage tripping delay, sec U_t 5 30 10 — 174 Min voltage protection permission U_r 0 2 0 0=prohibited, 1=permitted (no AR), 2=permitted (with AR) 175 Maximum line voltage, V U¯5 330 475 415 — 176 Max voltage tripping delay, sec U¯t 1 10 2 — 177 Max voltage protection permission U¯r 0 2 0 0=prohibited, 1=permitted (no AR), 2=permitted (with AR) 178 Line voltage imbalance, V Un5 15 120 35 — 179 Imbalance tripping delay, sec Unt 1 30 5 — 180 Imbalance protection permission Unr 0 2 0 0=prohibited, 1=permitted (no AR), 2=permitted (with AR) 181 Phase sequence protection permission UЧr 0 2 0 0=prohibited, 1=permitted (no AR), 2=permitted (with AR) 182 Load Engagement and Automatic Reset Parameter Code Min Max Default Description Address Automatic reset (AR) time, sec Att 0 900 5 — 183 AR prohibited for all faults Arr 0 1 1 0=prohibited, 1=permitted (except voltage faults) 184 Load relay after power-on APd 0 2 1 0=manual, 1=after AR delay, 2=after 2 sec 185 Load start/cutoff from front panel ACd 0 3 0 0=prohibited, 1=energize, 2=de-energize, 3=both 186 Miscellaneous Parameter Code Min Max Default Description Address Average current measurement time, sec t5i 10 600 60 Time for measuring iS1, iS2, iS3 187 MMSP mode enable 5in 0 1 1 0=disabled, 1=enabled 188 Indication before load energize 5iP 0 2 1 0=UAb, 1=PoA, 2=Att countdown 189 Parameter indication mode 5iC 0 1 1 0=continuous, 1=15 sec then iF1 190 Equipment operation time, days tbU 0 999 0 Read-only; hours via Modbus 191 User access code LOC 0 9 0 0=unlocked, 1-9=password 192 Service engineer access code PA5 000 999 123 000=permitted, other=password 193 System reset to factory settings PPP 0 1 0 Set 1 to restore defaults 194 Serial Interface Parameters (RS-485/RS-232) Parameter Code Min Max Default Description Address Communication address r5A 1 247 1 — 195 Transfer rate r55 0 1 0 0=9600, 1=19200 baud 196 Response to loss of connection r5P 0 3 0 0=continue, 1=warning, 2=warning+de-energize (AR), 3=warning+de-energize (no AR) 197 Response timeout detection, sec r50 0 120 0 0=prohibited 198 Communication permitted rPP 0 2 0 0=prohibited, 1=RS-232, 2=MODBUS 199 Device version rEL — — 14 Read-only; firmware dependent 200 Remote control via RS-232/RS-485 dUd 0 2 0 0=prohibited, 1=permitted, 2=wait for command 201 Remote control via switch dUc 0 4 0 0=prohibited, 1-4=see manual 202 Starter monitoring CCi 0 1 0 0=off, 1=on 203 Status and Fault Registers OM Status Register (Address 240) Bit Description 0 0 = no fault, 1 = fault (code in registers 241, 242) 1 0 = load relay open, 1 = load relay closed 2 0 = characterizing relay open, 1 = characterizing relay closed 3 0 = restart not activated, 1 = AR expected 4-6 Characterizing relay mode: 000=alarm, 001=time relay, 010=additional load, 011=reactive power alarm 7 0 = MMSP disabled, 1 = MMSP enabled Fault Registers Register Address Description Fault register 1 241 Bit mapping per Table 2.8 (0=no fault, 1=fault) Fault register 2 242 Bit mapping per Table 2.8 Fault codes (Table 2.8) Fault description Mnemonic Parameter value Address Fault code Register bit De-energizing based on main threshold crossing AP= Main threshold value in 100×W 300 0 241:0 Additional threshold crossing APd Additional threshold value in 100×W 301 1 241:1 Maximum phase current fault Ai= Maximum phase current 302 2 241:2 Line-to-earth fault (zero sequence current) Ai_ Zero sequence current 303 3 241:3 Currents present when load relay is de-energized (contactor fault) ACo Current 304 4 241:4 Phase sequence order fault AU — — 5 241:5 Minimum line voltage fault AU_ Voltage 306 6 241:6 Maximum line voltage fault AU¯ Voltage 307 7 241:7 Phase imbalance fault AUn Imbalance 308 8 241:8 Remote control channel fault AdU — — 9 241:9 Emergency load de-energize, AR not possible EAd — — 10 241:10 Emergency de-energize of load, AR possible by pressing UP+DOWN EOd — — 11 241:11 Emergency load de-energizing by remote breaker Edc — — 12 241:12 EEPROM destruction EEP — — 13 241:13 Fault Log Registers Description Address Fault code 1 243 Parameter value 1 244 Fault time 1 (high word) 245 Fault time 1 (low word) 246 Fault code 2 247 Parameter value 2 248 Fault time 2 (high word) 249 Fault time 2 (low word) 250 Fault code 3 251 Parameter value 3 252 Fault time 3 (high word) 253 Fault time 3 (low word) 254 Fault code 4 255 Parameter value 4 256 Fault time 4 (high word) 257 Fault time 4 (low word) 258 Fault code 5 259 Parameter value 5 260 Fault time 5 (high word) 261 Fault time 5 (low word) 262 Note Fault time is measured in minutes since OM-310 power-on Upon delivery or after factory reset, error code 40 and parameter value 10000 are written in the log When power is supplied, the number 5000000 is entered in all fault time registers Fault Parameter Value Registers Description Address Main threshold value (100×W) 300 Additional threshold value (100×W) 301 Maximum phase current 302 Zero sequence current 303 Contactor fault current 304 Minimum voltage fault value 306 Maximum voltage fault value 307 Imbalance fault value 308 Command Register Register Address Values R_COMMAND 220 0=de-energize, 1=normal operation, 2=early energize Value Action 0 De-energize load. If load is de-energized, before a power-on command from Remote Control has been received, the load will not energize. If load is energized, it will be de-energized. 1 Normal device operation. If load was de-energized by remote control command, by pressing DOWN+UP buttons (while ACd=3), or in case of a failure after which automatic restart is permitted, then load will be energized within specified automatic restart time. 2 Early load energizing. Value “2” record will lead to load power-on until expiration of the automatic reset time period. After load power-on, R_COMMAND=1. The R_COMMAND value is regarded by the OM-310 operation algorithm when dUd=1 or dUd=2. If dUd=0 and the user sets dUd=1 or dUd=2, then 0 will be recorded to R_COMMAND. If dUd=1, then after energizing “1” value (device normal operation) will be recorded in the command register. If dUd=2, then after energizing “0” value (load de-energized until the command to energize is received) will be recorded in the command register. In case of an emergency load shutdown by simultaneous pressing DOWN+UP buttons (while ACd=2 or ACd=3), the command register will be reset to 0. Energy Meter Reset Register Address Description Energy reset 239 Write 1 to reset all energy meters; auto-resets to 0