pplications: Over current Under current Load detection Monitoring of electric heating system General application- for any electrical load, monitoring

Transcription

1 Technical Datasheet True RMS Digital Protection Relay is used to protect against Over Current, Under Current, Current Loss, Current Unbalance. True RMS Measurement Trip relay cum DPM with Class different parameters on site selection Dual color LED for fault indication Stores last 5 faults Configuration via USB-based PRKB Detection of fault with display of parameter value Page of 7 4 digit 7 segment LED display

2 pplications: Over current Under current Load detection Monitoring of electric heating system General application- for any electrical load, monitoring for under load and over load conditions Motors- monitoring for conditions such as overload,locked rotor and short circuit Genset- to ensure load current is within generator capacity Machinery-detecting broken drive belt on machinery Product Features: Over current protection with IDMT curve uto / Manual reset In auto mode instrument automatically clears itself. If the device set into manual mode, the device must be manually reset by push button through display if it goes into fault. Under current protection Current loss protection User selectable 3 phase 3W or 4W Current unbalance protection User can on site program the network connection as either P2W / 3P4W / 3P3W network using front panel keys 4 Digits ultra bright Seven segment LED Display Trip relay cum DPM with Class 0.5 True RMS measurement The instrument measures distorted waveform up to 5 Harmonic. djustable set point for th Previous fault Storage Instrument memorizes the last 5 fault occurred. LED indications - LED indication for Relay- and Relay-2 status. - Trip indication are displayed on 4 Digit display. - Dual color LED for per phase indication green color for normal condition and Red color for faulty condition. ND function User can use NDing function to set trip on any two fault condition. - Over current - Under current - Current loss - Current Unbalance djustable time delay for - Over current - Under current - Current loss - Current Unbalance Trip or Buzzer mode Relay can be used to protect the system or simply to control the buzzer. Trip mode is for protection purpose and Buzz mode is for buzzer control. User Selectable CT Secondary The input rated current can be programmed on site as to 5 using front panel keys. Configuration via USB-based PRKB User can con gure the Meter using USB-based PRKB. Compliance to International Safety standards Compliance to International Safety standard IEC Page 2 of 7

3 NSI Numbers: User selectable CT primary The Primary of Current Transformer can be programmed on site from to k for Current protection relay. NSI NO. cronyms 37 Under current relay 5 Over current relay 46 Current unbalance relay EMC Compatibility Compliance to International standard IEC Onsite selection of uto scroll / Fixed Screen User can set the display in auto scrolling mode or fixed screen mode using front panel keys. Technical Specifications: Dimensions Details: Input Current Nominal Input Current (C RMS) Max Continuous Input Current 45% of CT Secondary System CT Secondary Values to 5 programmable on site System CT Primary Values to k programmable on site uxiliary Supply uxiliary Supply Voltage 60 V 300V C-DC Higher ux Nominal value 230 V C/DC 50/60 Hz for C ux OR External Lower ux 20 V 60 VDC / 20 V 40 VC Lower ux Nominal value 48 VDC / 24 VC 50/60 Hz for C ux ux Supply Frequency 45 to 66 Hz range Overload Withstand Current 20 x for second, repeated 5 times at 5 min Operating Measuring Ranges Current Range % of CT Secondary Frequency Hz V Burden Input Current Burden < 0.25 V approx. per phase uxiliary Supply Burden < 4 V approx. Reference condition for ccuracy Reference Condition 23 C +/- 2 C Input waveform Sinusoidal (distortion factor 0.005) Input Frequency 50 or 60 Hz ±2% uxiliary supply voltage Nominal Value ±% uxiliary supply frequency Nominal Value ±% Page 3 of 7

4 Electrical Connection: ccuracy Input Current ±0.5% of nominal value Frequency ±0.2 Hz Trip, Reset Delays, Power ON ±40 msec or ±5% of Set Delay, Whichever is Greater (WIG) L N UXSUPPLY L O D Technical Specifications: Influence of Variations 3 Phase 4 wire Unbalanced load Temperature coefficient : 0.05%/ C for current pplicable Standards EMC IEC Immunity IEC V/m min Level 3 industrial Low level L N UXSUPPLY L O D 3 Phase 3 wire Unbalanced load L N UXSUPPLY L O D Phase 2 Wire Electrical circuits. Relay 2 COM Relay COM 2 NO Safety IEC , Permanently connected use IP for water & dust IEC Pollution degree: Installation category: 300V CT III / 600V CT II High Voltage Test 2.2 KV C, 50Hz for minute between all NO 24 Note- Relay Contacts are shown in power off condition Environmental Operating temperature -0 to +55 C Storage temperature -25 to +70 C Relative humidity % non condensing Shock 5g in 3 planes Vibration Hz, 0.5mm amplitude Enclosure IP20 (front face only) Relay Contacts Types of output CO, 2CO, CO+CO Contact Ratings (Res. Load) 5/250VC/30VDC Mechanical Endurance x0^7 OPS Electrical Endurance NO- 3x0^4 OPS for CO / CO+CO relay - x0^4 OPS x0^5 OPS for 2CO relay Mechanical ttributes Weight 300g pprox Page 4 of 7

5 Definite Time Characteristics: Over set (%) Over (OC) and Under (UC) Current Under set (%) Over set (%) Under set (%) Over set (%) Under set (%) Relay - OC: -4 (Energized) Pd Relay 2- UC: 2-24 (De-Energized) Phase -LED Phase -LED Phase -LED Relay- LED (OC) Relay-2 LED (UC) ux Supply Relay States Energized De-Energized Time Current Loss (C.LoS) and Current Unbalance (C.un) Phase LED Indications Red blinking - Trip Delay (only Phase LEDs) Green blinking - Reset Delay (only Phase LEDs) Phase Fail set (%) RED ON - fault condition Unbalance Green ON - healthy condition Input bsent Phase Fail set (%) Relay LED Indications Unbalance RED ON - fault condition Green ON - healthy condition Phase Fail set (%) Pd Relay - C.LoS : -4 (Energized) Relay 2 - C.Un: 2-24 (De-Energized) Phase -LED Note: ] Pd- Power ON delay 2] - Trip delay 3] - Reset delay 4] Both relay can be configured to energize or de-energize mode 5] ny relay can be assigned to any fault condition Phase -LED Phase -LED Relay- LED (C.LoS) Relay-2 LED (C.Un) ux Supply Time Page 5 of 7

6 Operating elements: LED : Indicates status of I. It Lights green when input current is healthy, red in fault condition, red blinking in trip delay and green blinking in reset delay LED : Indicates status of I2. It Lights green when input current is healthy, red in fault condition, red blinking in trip delay and green blinking in reset delay. RISHBH RISHBH RELY- RELY-2 k 2 3 RESET TEST ENTER LED : Indicates status of I3. It Lights green when input current is healthy, red in fault condition, red blinking in trip delay and green blinking in reset delay. 4/5 - Relay- and Relay-2 status LED : Indicates status of relay- and relay-2 respectively. It lights green for relay in healthy condition and red for relay in trip condition. 6-4 Digit ultra bright 7 seg LED Display. 7 - K LED : It is used to show value in k. 8 - Enter Key : Confirms changes of parameter setting. When on the measurement screen, holding for 3 sec enters in setup menu. - Test Key : Increments setting value, move upwards in the menu or change parameter. It is also used to test operation of relay. Continuous holding of test key changes relay position and when release it resets the relay position (Only in healthy condition). 0- Reset Key : Decrements setting value, move downwards in the menu or change parameter. It is also used to reset relay when manual reset mode is selected. Parameter Settings: - Configuration via USB-based PRKB. Parameters Trip setting for Current loss Trip setting for Current Unbalance Trip setting for over current (IDMT Disabled) Trip setting for over current (IDMT Enabled) Trip setting for under current Setting for Differential / hysteresis Time Multiplier Setting (TMS) Individual Faults can be deactivated as per system requirement Relay control mode Reset Delay Programmable Delay for over current Programmable Delay for under current 5 - % 2-20% 0-40% 0-25% 0 - % - 5%* 0. - YES De-energize / Energize s Programmable Delay for Current loss Programmable Delay for current unbalance Power ON Delay s CT primary current - k Rated current to 5 Reset option uto / Manual Note * Differential setting range for current unbalance is limited as per its setting of trip point. Page 6 of 7

7 Hysteresis Calculation Method: Example: For C.un (Current Unbalance) CT Secondary = 5 Trip point = 0% of CT Secondary = 0.5 Hysteresis = 2% of CT Secondary = 0. Relay Reset point = Trip point - Hysteresis = = 0.4 Example: For OC (Over Current) CT Secondary = 5. Trip point = 0% of CT Secondary = 5.05 Hysteresis = 2% of CT Secondary = 0. Relay Reset point = Trip point - Hysteresis = = 4.5 Inverse Characteristics Curve [Over Current IDMT]: Relay Characteristics type Standard Inverse Very Inverse Extremely Inverse Long Inverse α C To Calculate Relay Operating Time when IDMT is enabled, use the following formula ) T= C I α Is ) x TMS Where, T = Time in Sec (Operating time of relay). I = Input Current. Is = Secondary Current. TMS = Time Multiplier Setting. C = Constant for relay characteristics. α = Constant representing inverse time type (α >0) Ordering Information Description Code OR0-I74H PROG. 3PH I U CO OR0-I74H PROG. 3PH I U 2CO OR0-I74H PROG. 3PH I U CO+CO Page 7 of 7