nader NDW3 Series Manual page 28

Grounding alarm output
Note: For details of the reverse and definite time limit, see the User Manual of NWK22 and NWK32 Controller,with the definite
time limit as T
g
Neutral line protection NWK21/NWK31 &NWK22/NWK32
Neutral wire protection
setting value
Protective features
Continued: Setting Values and Protective Features of Controller
Current leakage protection/alarm (namely the residual current protection)
Current setting value I△n
（A）
Action delay time T△n (s)
Alarm delay time T△n (s)
Alarm return current setting value
(A)
Alarm return delay time
Protective action/alarm features
(accuracy of ±10%)
Inherent absolute error: ±40ms
Alarm return features (accuracy of
±10%)
Inherent absolute error: ±40ms
Setting
time
Tripping time t(s)
I△n
(Accuracy of ±10%)
2I△n
5I△n
10I△n
Current leakage alarm output
Current unbalance protection/alarm NWK21/NWK31 &NWK22/NWK32
NWK21/NWK31
Internal & confidential file
文件编号:NDT2920213
The signal output is required to add a signal unit; set one DO of the signal unit as "grounding
alarm".
Without the signal output, observe the controller display screen or read from the display
indicator.
NWK21/NWK31 controller:50%In, 100%In or OFF;
NWK22/NWK32 controller: 50%In, 100%In, 160%In, 200%In or OFF.
OFF— Turn off N-phase protection function
Same-phase pole overload long time-delay protection, short-circuit short time-delay
protection, short-circuit instantaneous protection, ground protection
0.5~30.0 or OFF (OFF-Function off )
Instantaneous, 0.06, 0.08, 0.17, 0.25, 0.33, 0.42, 0.5, 0.5 , 0.67, 0.75 , 0.83
0.1～1.0
0.5～30.0
(s) 0.1～1.0
Current (I/I △n)
＜0.8
≥1.0
≥1.0
≤0.9
Instant
0.06 0.08
aneous
0.04 0.36 0.5
0.04 0.18 0.25
0.04 0.072 0.1
The signal output is required to add a signal unit; set one DO of the signal unit as
"current leakage fault".
Without the signal output, observe the controller display screen or read from the display
indicator.
Current unbalance setting value δ
Action delay time t
第 28 页 共 149 页
NWK22/NWK32
Tripping time
Inaction (no alarm)
Action (see the data below) or alarm (see the alarm
delay time)
Non-return
For alarm, see the alarm return delay time
0.17 0.25 0.33 0.42
1 1.5 2 2.5
0.5 0.75 1 1.25
0.2 0.3 0.4 0.5
(40％~100％) + OFF (OFF-Function off)
(s) 0.1～1.0
δ
文件版本:17
0.5 0.58 0.67 0.75
3 3.5 4 4.5
1.5 1.75 2 2.25
0.6 0.7 0.8 0.9
0.83
5
2.5
1