nader NDM3EU-400 Operating Instructions Manual page 7

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并经一定的时间后断路器将断开。
过载指示灯快速闪烁时(频率 4Hz)，表示在 3 次脱扣动作仍未导致产品脱扣。
Constant light of overload indicator indicates that actual current is more than 1.5 times of
overload long-time delay current setting Ir. The breaker will break the circuit after certain duration.
When the overload indicator flashes fast（frequency is 4Hz） ，it indicates that the 3 trip has not
caused the product tripped.
（2）电源指示灯 Power light
电源指示灯慢速闪烁时(频率 1Hz)，表示正常运行；
电源指示灯快速闪烁时(频率 4Hz)，代表控制器自检或系统运行过程中检测到故障。
When the overload indicator flashes slow(frequency is 1Hz)， it indicates that the system is
running normally；
When the overload indicator flashes fast (frequency is 4Hz)，it indicates that self-checking of
the controller or failure detected during the system operation.
注：两种指示灯应在每半年进行一次常规检验。
Note: Two indicator lights should have once routine inspection per half a year.
3.2.2.4 过载长延时保护 Protection of overload long-delay
a）过载长延时整定电流 Ir，容许偏差±3%;
a) Setting current Ir of overload long-delay, Allowable deviation is ±3%;
b）过载长延时整定时间 Tr，动作时间精度为±10%;
b) Setting time Tr of overload long-delay，Accuracy of action time is±10%;
c）当实际电流 I 超过 1.15 倍的过载长延时整定电流值 Ir 时，视为过载状态。过载保护按反时限特
性进行，延时动作时间 tr=（2×Ir/I）
c) When actual current's value is more than 1.15 times overload long delay setting current Ir,
see as overload status. Overload protection is carried out according to inverse time-delay
characteristics, delay action time tr=（2×Ir/I）
3.2.2.5 短路短延时保护 Short-circuit short-delay protection.
a）短路短延时整定电流 Isd，容许偏差±3%。设置为 off 时，控制器短路短延时保护功能关闭。
a) Setting current Is of short-circuit short-delay, Allowable deviation is ±3%.
b）短路短延时保护动作时间值 Tsd，动作时间精度为理论值±10%（注意：0.1s 和 0.2s 这两个档
位，固有绝对误差±40ms） 。
b) Action time value of short-circuit short-delay protection, accuracy of action time is ±
10%(Notes: Inherent absolute deviation is ±40ms for 0.1s and 0.2s these two gears).
c）短路短延时保护分为定时限保护和反时限保护两种方案。
c) Short-circuit short-delay protection include two schemes of definite time-delay and inverse
time-delay protection.
当故障电流 1.5×Isd＞I≥Isd 时，具有反时限保护特性，即 tsd=（1.5×Isd/I）
When fault current is 1.5×Isd＞I≥Isd, triggered by inversed time-delay characteristics，即 tsd=（1.5×
NDT2920257
Edition
×Tr。
2
第 2 版
版次
Version 2
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6
实施日期
Implementation date
2019.12.31
文件控制
×Tsd；
2
2019-08-19