Relay kỹ thuật số bảo vệ tích hợp quá áp, thiếu áp, mất pha, đảo pha, mất cân pha, tần số thấp, tần số cao. Tất cả các chức năng có thể lập trình on/off
FEATURES - TÍNH NĂNG CHÍNH
- Network selection 3Ø-4 wire / 1Ø-2 wire
- Monitoring Under Voltage / Over Voltage / Asymmetry / Phase reversal / Phase failure (Phase loss)
- Monitoring Over Frequency / Under Frequency
- Adjustable trip levels
- Separate selectable trip time delay for Voltage And Frequency
- Error indication on LCD display as well as by LEDS
SPECIFICATION - THÔNG SỐ KỸ THUẬT CHÍNH
- NOMINAL VOLTAGE (Vn) : 240 VAC
- NOMINAL FREQUENCY : 50 Hz
- SUPPLY VARIATION : 70 - 130% of Vn
- SUPPLY NETWORK SELECTION : 1 Ø-2 wire / 3 Ø-4 wire
- PHASE FAILURE TRIP :
- For L1 Phase: <70% of nominal voltage
- For L2 & L3 phase: OFF / 70% of nominal Voltage
- Min voltage measurable: 60V (In OFF Condition)
- VOLTAGE ADJUSTMENT :
- Under Voltage: OFF / 180 to 234V (in one volt step)
- Over Voltage: OFF / 246V to 300V (in one Volt step)
- Voltage Asymmetry: OFF / 0V to 99V (in 1V Step)
- TRIP TIME DELAY FOR VOLTAGE (tr):
- 0.2 to 99 sec (Actual delay=Adjustable delay + Response time)
- Accuracy: ± 0.5% of F.S. or ±100ms (whichever is greater)
- ADJUSTMENT OF HYSTERESIS FOR VOLTAGE : 1 to 10% of trip level
- FREQUENCY ADJUSTMENT :
- Under frequency: OFF / 40 - 49Hz ( in 1 Hz step )
- Over frequency: OFF / 51 - 60Hz ( in 1 Hz step )
- TRIP TIME DELAY FOR FREQUENCY (tf):
- 0.2 to 99 sec (Actual delay=Adjustable delay + Response time)
- Accuracy: ± 0.5% of F.S. or ±100ms (whichever is greater)
- ACCURACY : ±0.5% @ constant conditions
- RESPONSE TIME : 150ms max
- POWER ON DELAY (Td) : Approx 400ms
- OPERATING TEMPERATURE : OoC to 50oC
- RESET : Auto reset on removal of fault condition
- OUTPUT RATING : Fail safe relay SPDT: 7A@250 VAC/30 VDC, Resistive
- PAGE UPDATE TIME : 2 sec
- DISPLAY UPDATE TIME : 1 sec