Earth Leakage, Optional (G)- I
Δ
n,
Δ
t
1. Standard setting current knob: I
Δ
n
- Setting range: 0.5-1-2-3-5-10-20-30-Off (A)
2. Time delay setting knob:
Δ
t
- Trip time: 140-230-350-800 ms
- Alarm time: 140-230-350-800-950 ms
3. Settings within its alarm range will prevent its breaker from
tripping but activating its alarm.
4. This function is enabled and can be used only with standard
ZCT provided by LS or private external CT (secondary output
5A) selected by customers.
5. 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.
Setting range
Step
Accuracy
Setting range
Step
Accuracy
Under voltage
80V ~ 0V_Pick-up
1V
±5%
Over voltage
UV_Pick-up ~ 980V
1V
±5%
Voltage unbalance
6% ~ 99%
0.01
±2.5% or (±10%)
Reverse power
10~500 kW
1kW
±10%
Over power
500~5000 kW
1kW
±10%
Current unbalance
6% ~ 99%
0.01
±2.5% or (±10%)
Over
60Hz UF_Pick-up ~ 65
1Hz
±0.1Hz
frequency
50Hz UF_Pick-up ~ 55
1Hz
±0.1Hz
Under
60Hz 55Hz ~ OF_Pick-up
1Hz
±0.1Hz
frequency
50Hz 45Hz ~ OF_Pick-up
1Hz
±0.1Hz
0.2~40sec
1.2~40sec
0.1sec
±0.1sec
Other protections
Time delay(s)
Pick-up
1.2~40sec
N.A.W. Controls Pty. Ltd.
Telephone: (03) 9464 6555
www.nawcontrols.com.au
LS ACB AS & AN range
June 2020
Catalogue number:
AN
□□□□□□
AS
Air Circuit Breaker 1600-5000 70-85kA
AS
□□□□□□
Ground Fault (G)- Ig, tg
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 (I2t On): 0.1-0.2-0.3-0.4 sec
- Definite time (I2t Off): 0.05-0.1-0.2-0.3-0.4 sec
3. Ground fault current is vector sum of each phase current.
Therefore, 3 Pole products may operate under its phase-
unbalance including in a ground fault situation.
4. When ZSI function is set, the protection operation will take place
instantaneously with the 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)
