LSIS Susol UTS800 Manual Del Usuario página 23

합본 Manual_800_1200AF_4 2014.7.17 5:46 PM 페이지21 위너스3
2) Operation characteristic
Long-time delay (L)
N, A type
P, S type
Short-time delay (S)
Instantaneous (I)
Ground Fault (G)
Trip Relay Setting
The function for overload protection which has time delayed
characteristic in inverse ratio to fault current.
1. Standard current setting knob: Ir
1) Setting range in P type and S type: (0.4-0.5-0.6-0.7-0.8-0.9-1.0)×In
2) Setting range in N type and A type: (0.4 ~1.0)×In
- Iu: (0.5-0.6-0.7-0.8-0.9-1.0)×In
- Ir: (0.8-0.83-0.85-0.88-0.9-0.93-0.95-0.98-1.0)×Iu
2. Time delay setting knob: tr
- Standard operating time is based on the time of 6×Ir
- Setting range: 0.5-1-2-4-8-12-16-20 sec (8 modes)
3. Relay pick-up current
- When current over (1.15)×Ir flows in, relay is picked up.
4. Relay operates basing on the largest load current among R/S/T phase.
The function for fault current (over current) protection which has definite
time characteristic and time delayed in inverse ratio to fault current.
1. Standard current setting knob: Isd
- Setting range: (1.5-2-3-4-5-6-8-10-Off)×Ir
2. Time delay setting knob: tsd
- Standard operating time is based on the time of 10×Ir.
- Inverse time (I 2 t On): 0.1-0.2-0.3-0.4 sec
- Definite time (I 2 t Off): 0.05-0.1-0.2-0.3-0.4 sec
3. Relay operates basing on the largest load current among R/S/T phase.
4. When ZSI function was set, the protection operation will take place instantaneously with input absence by
downstream devices. It is advised to disable its ZSI function on the last downstream device.
The function for breaking fault current above the setting value within
the shortest time to protect the circuit from short-circuit.
1. Standard current setting knob: Ii
- Setting range: (2-3-4-6-8-10-12-15-Off)×In
2. Relay operates basing on the largest load current among R/S/T phase.
3. Total breaking time is below 50 (±10)ms.
The function for breaking ground fault current above setting value after
time-delay to protect the circuit from ground fault.
1. Standard setting current knob: Ig
- Setting range: (0.2-0.3-0.4-0.5-0.6-0.7-0.8-1.0-Off)×In
2. Time delay setting knob: tg
- Inverse time (I 2 t On): 0.1-0.2-0.3-0.4 sec
- Definite time (I 2 t Off): 0.05-0.1-0.2-0.3-0.4 sec
3. Ground fault current is vector sum of each phase current. Therefore, 3Pole products may operate under its
phase-unbalance including ground fault situations.(R/S/T Phase)
4. When ZSI function was set, the protection operation will take place instantaneously with input absence by
downstream devices. It is advised to disable its ZSI function on the last downstream device.
5. Ground-fault functions are basically provided with products equipped with a trip relay through its internal CT
that is embedded in each phase.(But, it can't be used with earth-leakage protection function at the same time)
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UTS800/UTS1200