nader NDM2E Series Product Manual page 12

文件编号：NDT2920018 文件版本：4
4. If the accumulated energy exceeds (7.2 × Ir) 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 Ir 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 × Ir / I ) 2 x Class。
5. 电流不平衡率选择 OFF 时，控制器同时也关闭了断相保护功能，电流不平衡率的计算是，三相电流的
最大值与三相电流最小值的差值，与三相电流的平均值之间的比值，即为三相电流的不平衡率。
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. 短路短延时功能，在脱扣等级规定的时间内是关闭的，在脱扣等级规定的时间过后，短路短延时功能
才被打开。
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 Ip 的整定值，经一定时间后黄灯将由闪亮转
为恒亮。
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）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 Ir 的 1.15 倍，处于过载状态，并经一
定的时间后断路器将断开。
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.
（3）电源指示灯 Power light
电源指示灯，在控制器得电后，开始闪烁，闪烁频率约为 1Hz，表明当前控制器处于有电状态，也可以表
明控制器处于正常工作状态。
When the controller is powered on, the power indicator light starts flashing. The flashing
frequency is about 1Hz, indicating that the controller is in the active state. It also indicates
that the controller is in the normal working state.
3.2.3 NDM2E 控制器通讯功能 Communication function of NDM2E controller
NDM2E 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 NDM2E 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
NDM3E 断路器通讯接口的现场总线规约为：Modbus—RTU。
The on-site bus protocol of NDM3E breaker's communication port: Modbus—RTU
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