文件编号
Doc.No.
NDT2920002
版次
Edition
第
5
版
Version5
实施日期
Implementation date
20181213
14
In, Then directly by 1 times the In to calculate。
4. If the accumulated energy exceeds (7.2
×
I
R
)
2
×
Class for a period of time specified in the
tripping rating, the motor-protective circuit-breaker shall be tripped in advance. If it is less than the
value specified in the previous paragraph and the time until the tripping time.The current is not
reduced to 1.5 I
R
or less, then the time specified in the tripping rating to the time, immediately
tripping; outside the tripping time, the circuit breaker tripping time according to the formula t = (7.2
×
I
R
/ I )
2
x Class。
5. When the current unbalance rate is OFF, the controller also shuts off the phase protection
function. The calculation of the current unbalance rate is the difference between the maximum value
of the three-phase current and the minimum value of the three-phase current and the average value
of the three-phase current between three-phase current unbalance。
6. Short-circuit Short delay function, which is switched off within the time specified in the
tripping rating , after the time specified in the tripping rating has elapsed, the short-circuit short
delay function is switched on。
3.2.2.3 指示灯 Indicator light
（1）预报警指示灯 Pre-alarm light
预报警指示灯黄灯闪亮时，表示实际电流超过了预报警电流 I
p
的整定值，经特定时间后黄灯将由
闪亮转为恒亮。
（2）过载指示灯 Overload light
过载指示红灯恒亮时，表示实际电流超过了过载长延时整定电流值 I
R
的 1.15 倍，处于过载状态，
并经一定的时间后断路器将断开。
（1）Flashes of pre-alarm indicator light indicate that actual current has exceeded setting value for
pre-alarm current Ip. After certain duration, the flashes will turn into constant illumination.
（2）Constant light of overload indicator indicates that actual current is more than 1.5 times of
overload long-time delay current setting I
R
. The breaker will break the circuit after certain duration.
3.2.2.4
NDM3E 控制器通讯功能 Communication function of NDM3E controller
NDM3E 通讯功能通过外挂式通讯模块来实现“四遥”功能。该通讯模块可将断路器的相关信息经
现场总线传至上位机，上位机通过通讯模块下发指令操作电动操作机构，从而控制断路器的合、分。
The communication function of NDM3E can achieve “Four-remoteness” functions through the
external hanging communication modules. The communication module can transfer relevant
information of the breaker to upper computer through on-site bus, and then the upper computer can
use the instructions released by the communication module to operate the motor -operated
mechanism, and achieve closing and opening of the control breaker.
通讯模块上传的信息包括：Information uploaded by the communication module includes:
· 断路器设备代码；Equipment code of the breaker;
· 断路器各参数设定值；Setting values of the breaker’s parameters;
· 断路器的合、分状态；Closing and opening state of the breaker;
· 通过断路器每极的实时电流。Real-time current passing through each pole of the breaker
