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| | | | | 1. FEATURE
The multi digital protective relay(Type D2K-OG50) is designed using 32bit DSP and 14bit A/D Converter. 12 Sampling method per cycle is applied. For total network, RS-485 port is prepared at the back terminal block while RSC-232C port at the front plate is for PC connection at site. Not only ten times event recording but also 5 times fault recording function are provided for fault analysing purpose. 7 kinds of time characteristic curve can be selected to meet any kind of protection coordination. each fault data have a real time tag occurred, fault current and fault duration. | | | | | | 2. APPLICATION
The multi digital Over Current Protective Relay(Type D2K-OG50) can be applied not only for a backup protection in over 154kV system but also for main protection purpose on the 24kV distribution system for solid or medium resistance grounding system. Ten events and five fault wave recordings will help for fault analyzing purpose. | | | | | Part Name | OCEF Three Phase – Over Current and Earth Fault Relay | | Model | D2K-OG50 | | Standard code | IEC 255 . KEMC 1120 . and KEPCO | | Element | Overcurrent (50/51) 3Phase . Earth Fault (50N/51N) | | Aux. power | AC 110 / 120V and DC 100 / 125V ±30%, 9W(Non oper) 16W (Oper) | | Rating | AC 5A, 50 / 60㎐ | | | Burden OC / EF 0.3VA | | Setting range | OC | Overcurrent : 0.2~15A (0.1A step) Instantaneous : 5~80A (1A step) Time lever : 0.1~15 (0.1 step) | Inst Time | 40ms이하 | | EF | Overcurrent : 0.2~15A (0.1A step) Instantaneous : 5~80A (1A step) Time lever : 0.1~15 (0.1 step) | | Time curve | 장강반한시(LT-VI), 반한시(H-IN), 강반한시(V-IN), 초반한시(E-IN) IEC std. 반한시
(NIES), 강반한시(VIES), KEPCO std.. | | Resetting value | Set of > 95% | | Reset time | 50㎳ ±25㎳ | | Degree protection | IP52 | | Short current | 80 In | | Communication | RS232 (Front view), RS485 (Reare view) | | Key – pad | Mode, ESC, Enter, Direction Key (←,↑,→,↓) | | Indicator | RUN (Green) : C.P.U Error 동작상태 감시 및 전원감시 COMM (Yellow) : 깜박일 때 신호 출력 중 PICK-UP (Red) : Pick-up 과부하 동작시 점등 ERR (Red) : 내부회로 및 소자
불량시 점등 R.S.T.N :동작상표시INST :단락상태 표시등 | | Fault Memory | 10회 Memory 가능 및 사고선로별 회로표시 (선입선출방법, “1”이 최근 사고를 뜻함) Memory event recording time 1.2sec | | Reset | Auto Reset, Indicator (Manual Reset) | | Temperature | Operating temperature -10 ~ 60℃ Storage temperature -20 ~ 70℃ | | Mounting | Flush mounted type | | Contact capacity | Make AC 250V 15A 0.5sec (L/R-0), DC 125V 30A 0.5sec Break AC 250V 3A 0.5sec (L/R-0), DC 125V 5A 0.5sec | | Output contact | Main trip 2a CPU Error : SCADA 1a, alarm 1a OC 과부하 : SCADA 1a, alarm 1a OC
단락 : SCADA 1a, alarm 1a EF 과부하 : SCADA 1a, alarm 1a EF 단락 : SCADA 1a,
alarm 1a | | Life time | 기계적 수명:10 × 106 전기적 수명:5 × 105 | | Withstａnd voltage | 2kV for 1minute between all terminal | | Lightning impulse withstａnd voltage | 1.2㎲/50㎲ 5㎸ Positive/Negative electrodes, 3times | | Surge transient | 2.5㎸ / 1㎒ (IEC255-4) | | Electrostatic | 5W transceiver 150㎒-400㎒ / 0.3m (IEC 1000-4-3 c1.2) | | Transient Bust immunity | Aux. power, contacts, current-4㎸ (IEC 255-22-4) | | Electrostatic discharge | 8㎸ in air, 6㎸ by contacting | | Vibration | Vibration frequency : 16.7㎐ Double amplitude : 0.4㎜ Direction : horizontal, vertical, transverse | | Shock | Shock acceleration : 50G Shock application direction : horizontal, vertical, transverse Shock times : 3 times | | | | | | |
