变压器中性点接地电阻柜

Transformer neutral point grounding resistance ark 

一、作用

A, 

连接于变压器中性点与大地之间的一种限流电气保护设备，在电网正常运行时不工作，当电网线路出线故障时，变压器中性点电压将产生偏移（中性点电压不再为零），如果变压器中性点接有接地电阻装置，它可以将配电网中性点强制接地，并限制其故障电流，使继电保护设备有足够的时间进行检测，实现跳闸和备用切换，避免配电网和电气设备遭到破坏。

Connection between transformer neutral point and the earth a current-limiting electrical protection equipment, don't work in the normal operation of power grid, when a fault line qualification, transformer neutral point voltage will generate offset (neutral point voltage is no longer zero), if transformer neutral point grounding resistance device, it can be distribution network neutral point grounding compulsory, and limiting the fault current, make the relay protection device has enough time for testing, realize the trip and the standby switch, avoid the distribution network and electrical equipment damage. 

二、适用范围

Second, the scope of application 

广泛用于 6～35kV系统，安装在变压器中性点处。

Widely used in 6 ~ 35 kv system, installed on the transformer neutral point. 

三、产品特点

Three, product features 

1、柜体材质采用不锈钢板，外型美观，耐腐蚀性强，防护等级可达IP55。        2、根据不同的使用条件，电阻柜分为户内型和户外型。

1, the cabinet put oneself in another's material is made of stainless steel plate, good appearance, strong corrosion resistance, protection grade reaches IP55. 2, according to the different conditions of use, resistance cabinet is divided into indoor and outdoor. 

3、电阻材质可采用特种合金材料。

3, resistance material can use special alloy materials. 

4、当变压器绕组为△形联结而需要独立安装Z形绕组接地变压器时，中性点接地电阻器可与之配套使用。

4, when the transformer winding is delta connection and need independent installing a zigzag winding grounding transformer, neutral grounding resistor can be used to match. 

5、可加装电阻监测记录仪。

5, can be mounted to the resistance monitor. 

6、电阻柜可选配电阻监测记录仪，电阻监测记录仪集数据采集、温度控制、告警、通讯于一体，具有过流、失电、超温、接地等故障状态下的告警功能，能够监视中性点电流、柜内温度、接地时间、接地次数，并且可将这些信息通过通讯接口上传到计算机后台监控系统，通讯采用MODBUS通讯协议。

6 optional resistance monitoring recorder, resistance ark, resistance monitoring recorder set data acquisition, temperature control, alarm, communication at an organic whole, over-current, power loss and overtemperature, grounding fault condition of the alarm function, can monitor neutral current, temperature, time of grounding, grounding contained in the number of times, and can upload the information through the communication interface to computer background monitoring system, communication adopts the MODBUS communication protocol.