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Idiomas disponibles
Idiomas disponibles
MCP800
- Instant Only
- Ii (Adjustable instant)
Instantaneous
Current setting (A)
Ii = In×...
Tripping time
MCP1200
- Instant Only
- Ii (Adjustable instant)
Instantaneous
Current setting (A)
Ii = In×...
Tripping time
MCS
- Instant Only
- Ii (Fixed instant current)
- GCB800: 12,000A / GCB1200: 18,000A
2) Operation characteristic
Long-time delay (L)
N, A type
P , S type
Short-time delay (S)
Instantaneous (I)
Trip Relay Setting
2
3
50(±10ms)
2
3
50(±10ms)
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
t On): 0.1-0.2-0.3-0.4 sec
²
- Definite time (I
t Off): 0.05-0.1-0.2-0.3-0.4 sec
²
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.
- 18 -
4
6
8
10
4
6
8
12
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