NKR Boundary switch different protection controller with ordinary LCD protection controller
分界开关保护控制器与普通液晶保护控制器的区别
1 watchdog boundary protection can distinguish fault is from users outside or within the boundary demarcation
Can greatly improve the reliability of power supply for users, avoiding other fault user affects the normal power supply user
2 built-in super capacitor, even in the higher substation tripping, after the delay decision bounds after failure, can still tripping time, increase the reliability of switch action
3 dial type protection setting value, you can set the protection setting value directly in a completely without electric power, all the fixed value of stick out a mile, a comprehensive visualization!!
1 看门狗分界保护可以区分故障是来自用户的分界外还是分界内
可以大大提高用户的供电可靠性,避免了其他故障用户影响了正常用户的供电
2 内置超级电容,即使在上级变电站分闸后,经过延时判定界内故障后,仍可以分闸一次,增加了开关动作的可靠性
3 拨码式保护定值,可以在完全没有电的情况下直观地设置保护定值,所有定值一目了然,全面可视化!!
VS 
Intelligent data machine palm, can in the boundary controller within 30 meters, check the switch current, voltage state, the protection setting value,
While the ordinary liquid crystal protection controller need to climb the pole to view data, protection setting value requires several operations to read!
The boundary protection processing method
The controller input signal: A total of four phase current, phase C current, the zero sequence current, AB phase to phase voltage.
Through the real-time monitoring of the controller input, and compared to determine the line fault types and constant value, so as to carry out corresponding treatment. The following table for the system of neutral point protection treatment results in different operation modes.
智能掌上数据机,可以在分界控制器的30米范围内,查看开关的电流,电压状态,保护定值,
而 普通液晶保护控制器 需要登杆才能查看数据,保护定值需要多次操作才能读取!
分界保护处理方式
控制器输入信号共四个：A相电流、C相电流、零序电流、AB相间电压。
控制器通过实时监测上述输入量，并与定值进行比较来判断线路故障得类型，从而进行相应的处理。下表为系统中性点不同的运行方式保护处理结果。
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fault protection treatment
故障点保护处理
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The single-phase grounding fault
单相接地故障
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Non-ground neutral system user limits
中性点不接地系统用户界内
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single-phase earth fault judgement for permanent ground immediately after trip
判定为永久接地后立即跳闸
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Neutral point via arc suppression coil grounding user limits
中性点经消弧线圈接地用户界内
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Neutral point via small resistance grounding user limits
中性点经小电阻接地用户界内
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Before the substation tripping protection action
先于变电站保护动作跳闸
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Non-ground system users out
中性点不接地系统用户界外
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Neutral point via arc suppression coil grounded out by the user
中性点经消弧线圈接地用户界外
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Neutral point via small resistance grounding out by the user
中性点经小电阻接地用户界外
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Interphase short circuit fault
相间短路故障处理
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User limits brake fault
用户界内故障
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Supply side circuit breaker tripping after power failure, demarcation load switch tripping 电源侧断路器跳闸停电后,分界负荷开关分闸
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The user out fault
用户界外故障
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