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图1 NDM3EU-225/400 控制器控制面板
Fig. 1 Control panel of NDM3EU-225/400 controller
3.2.2 NDM3EU 控制器控制面板各部分功能 Functions of each part in control panel of NDM3EU controller
(1)测试端口 Test port
即“TEST”端口，NDM3EU 专用测试仪通过该端口与控制器相连，进行测试及调试等操作。
That is, the "TEST" port, the NDM3EU dedicated tester is connected to the controller through this port for
testing and debugging operations.
(2)电流、时间调节旋钮 Current and time adjustment knob
可通过电流、时间旋钮的调节，选择适当的组合以达到保护线路、保护设备的作用。此项操作必须由
专业技术人员进行。
注：Tr 表示当实际电流为 Ir 整定值的 2倍时，断路器动作时间。
如：当 Ir 整定为 400、Tr 整定为 12s 时，当主回路电流为 2×400A 时，断路器将持续 12s 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=(2*Ir/I)2*Tr
I——表示过载情况下，主回路实际电流值。
The current and time knobs can be adjusted to select the appropriate combination to protect the circuit and
protect the device. This operation must be performed by a professional technician.
Note: Tr indicates the breaker operating time when the actual current is twice the Ir setting value.
For example, when Ir is set to 400 and Tr is set to 12s, when the main circuit current is 2×400A, the circuit
breaker will continue to open the main circuit after 12s. The operating time accuracy is ±10%.
With overload current, the time when the circuit breaker opens the main circuit follows the formula:
t= (2*Ir/I)2*Tr
I—— indicates the actual current value of the main circuit with overload conditions.
3.2.3 指示灯 Indicator light
(1)电源指示灯 Power
控制器处于工作状态时指示灯闪亮。
The indicator light flashes when the controller is in operation.
(2)过载指示灯 Overload
过载指示灯常亮时，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
