文件编号：
NDT2920002
文件版本：
5
地址：上海市浦东新区申江南路
2000
号
邮编：
201315
电话：
(021)68586699
传真：
(021)23025796
第
11
页
共
39
页
如：当 I
R
整定为 250A、T
R
整定为 100s 时，当主回路电流为 2³250A 时，断路器将持续 100s 时后断开主回
路。动作时间精度为±10%。在过载电流下，断路器断开主回路的时间遵循以下公式：
t=(2³I
R
/I)
2
³T
R
（其中 I 表示过载情况下，主回路实际电流值）
2. T 型、GT 型只能通过电脑上位机通讯软件调整整定值。
3. 电动机保护型面板，（2）整定是与其他类型的控制器的整定方法不同，两旋钮相加后的值作为最
后整定的值，若相加的和超过 In，则直接按 1 倍的 In 来计算。
4. 电动机保护型断路器，如在脱扣等级规定的时间范围内，若累积的能量超过(7.2
×
I
R
)
2
×
Class,则提
前脱扣，若小于前面约定的值，且至脱扣等级时间到时，电流仍未降至 1.5 I
R
以下，则在脱扣等级规定的
时间到时，立即脱扣；在脱扣等级时间外，断路器脱扣的动作时间按公式 t=(7.2
×
I
R
/I)
2
×
Class 计算。
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。
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。
Notes: 1.T
R
indicates the operating time of the breaker when actual current is twice of I
R
setting.
E.g.: when I
R
and T
R
are set as 250A and 100s respectively, when the current in main circuit reaches
2³250A, the breaker will disconnect the main circuit after lasting for 100s. The time precision
of action is ±10%. Under the overcurrent, the time that the breaker disconnects the main circuit
shall follow the following format: t=(2³I
R
/I)
2
³T
R
(Of which, I stands for the actual current
in the main circuit under overcurrent.)
2. The setting values of T type and GT type breakers can only be adjusted through
communication software of the upper computer.
3. The motor protection type panel ，(2) settings are not the same as those of other types
of controllers. The values of the two buttons are added as the final setting value. If the sum
is more than 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.
