NOVATEK-ELECTRO LTD Research-and-Manufacture Company POWER LIMITER OM-310 USERS MANUAL www.novatek-electro.
-2- CONTENT 1. DESCRIPTION AND OPERATION .................................................................................................................................... 3 1.1 APPLICATION .............................................................................................................................................................. 3 1.1.1 OM-310 power limiter is designed for the following applications: ......................................................................... 3 1.1.
-3- 1. DESCRIPTION AND OPERATION 1.1 APPLICATION 1.1.
-4- 1.1.3 Integrated relays output terminals specification The internal relays output terminals specifications are outlined in Table 1.1 and Table 1.2 Table 1.1 - Load relay Max. current for U~ 250 V Cos ϕ = 0.4 Cos ϕ = 1.0 5А 8А Number of trips х1000 Max switching power Max sustained safe AC/DC voltage Max. current for U = 30V D.C. 200 100 1000 VА 440/125 V 1.3 А Table 1.2 - Characterizing relay Max. current for U~ 250 V Cos ϕ = 0.4 Cos ϕ = 1.
-5- - PC, connected to one of OM-310 interfaces (MODBUS, RS-232). Table 1.4 - Measured and Displayed Parameters Measurement functions Range Accuracy Currents Phase currents RMS values, A 0,5-999 2% Zero sequence current RMS value, A Each phase average current value at time specified in tSi parameter Мах each phase average current value obtained (was obtained) since last power on.
-6- * 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/RS485 in amperes. ** 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). *** Note.
Settings and read-off parameters Code pa- Minimum Max. rameters values values -7Default setting Address Operation 2 – relay will close after expiration of time or after reduction of consumed wattage to level of whichever is earlier Delay of characterizing 0 300 relay closure relatively to load relay closure Allowable load wattless 3 450 power, kVar. Current protection.
Settings and read-off parameters Code pa- Minimum Max.
Settings and read-off parameters Code pa- Minimum Max.
- 10 12 – button (marked in text as UP) – used to scroll through indicated parameters in the parameter view mode and scroll through menus in the parameter setup mode 13 – button (marked in text as DOWN) – used to scroll through indicated parameters in the parameter view mode and scroll through menus in the parameter setup mode 14 – key – RES/MEM/SEL – used to record parameters in setup mode; switch between groups of parameters displayed in view mode, reset 15 - SETUP button engages the parameter setup mode
- 11 - t1F - time, during which the load relay will be open after de-energizing resulting from the watts input crossing the main threshold Figure 1.2 - OM-310 operation in the power limiting mode when =0, =1, =3 1.2.5.3 Active power limiting during operation of a characterizing relay at = 2 ( relay used for connecting additional load) After ОМ-310 energizing, after AR time (Att parameter) the load relay will close.
- 12 - When =2, the thresholds values (kW) are defined as follows: Main threshold (kW) = “Pnn” * “P1F” / “100”, where “Pnn” – cumulative rated load wattage, kW; “P1F” – main threshold, %. Additional threshold (kW) = “Pnn” * “P2F” / “100”, where “P2F” – additional threshold, %. At any value of rPn, the additional load energizing threshold shall be determined as: Energizing threshold (kW) = (“Pnn” * “P2n”) /(“100”), where “P2F” – additional load energizing threshold, %. 1.2.6 Protection functions 1.2.6.
- 13 - Figure 1.5 - Principle of protection with dependent time delay Graphs for the protection operation time constant equal to 1 sec (“” parameter) are provided in Appendix 1. When a different value for time constant is set, the protection trip time changes proportionally to the time constant (for example, at “”=10 seconds the protection trip time at the same current ratio will increase 10 times). 1.2.6.
- 14 - 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 the SETUP button shall be pressed again. The "SETUP" LED lights up, and figure "0" is blinking on the indicator. With the UP and DOWN buttons user enters a password digit from 1 to 9 and presses the RECORD/RESET/SELECT button. If the password is correct, the keypad will be unlocked.
- 15 - While in Service Engineer access mode, any additional parameter can be added to the MMSP parameter register. Action: - with DOWN and UP buttons choose the parameter to be added; - push buttons DOWN and UP simultaneously. To exclude a parameter from the MMSP register: - with DOWN and UP buttons choose the parameter to be excluded; - push buttons DOWN and UP simultaneously.
- 16 L1 L2 L3 N X1-1 Cont Designation 27 28.5 30 31.
- 17 - When power-on inhibiting factors are not present, the load relay closure is defined by APd parameter value (ОМ-310 device operation after power-on) At =0 the load relay will not close. To close load relay in this case both DOWN and UP buttons have to be pressed simultaneously. 1) When =1 the load relay will close after AR time. 2) When =2 the load relay will close in 2 sec after power-on. Simultaneously with the load relay closure, green LED LOAD starts to glow.
- 18 - Figure 2.2 - ОМ-310 connection to PC schematic 2.4.4.3. Communication protocol The exchange between PC and ОМ-310 is effected via data packages. Data packet format is given in Table 2.1. Table 2.1 START ADR CMD DATA 0 ….
- 19 - Table 2.3 Settings and read-off parameters Code parameters Address Equipment operation time counter, days User access code Service engineer access code System reset to factory settings Device version 207 208 209 210 217 A parameter recording is performed independently from the installed Service Engineer protection (the entry made via communication line has a higher priority).
- 20 - The checksum field size occupies two bytes. The checksum within message is transferred with low byte coming first.
- 21 - Fault code 2 value of parameter 2 Fault time 2 Fault code 3 value of parameter 3 Fault time 3 Fault code 4 value of parameter 4 Fault time 4 Fault code 5 value of parameter 5 Fault time 5 247 248 249 250 251 252 253 254 255 256 257 258 259 260 261 262 fault code according to table 2.8 parameter value according to table 2.8 two upper bytes two lower bytes fault code according to table 2.8 parameter value according to table 2.8 two upper bytes two lower bytes fault code according to table 2.
- 22 - When =1, the ОМ-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 =2, ОМ-310 will energize load only after the corresponding command via RS-232/RS-485 has been received. The R_COMMAND value is regarded by the ОМ-310 operation algorithm when =1, =2. If =0 and the user sets =1 or =2, then 0 will be recorded to R_COMMAND.
- 23 - Table 2.
- 24 - 3. MAINTENANCE 3.1. SAFETY During maintenance operations, ОМ-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 ОМ-310 terminals is checked, casing integrity check for cracking and chipping. 4.
- 25 - APPENDIX 1- Dependent time delay current based protection types: NOVATEK-ELECTRO ОМ-310
- 26 - ОМ-310 NOVATEK-ELECTRO
- 27 - NOVATEK-ELECTRO ОМ-310
- 28 - ОМ-310 NOVATEK-ELECTRO
