Secondary circuit diagram of voltage transformer using V-V connection

Voltage transformer secondary circuit diagram

110kV Bus block spacing secondary circuitBB:Microcomputer line protection measurement and control deviceSFA:Selector switchSFB:Selector buttonPGW:White lightPGG:Green lightPGR:RedlightQB:Travel switchTA:Current transformer

11kV Substation secondary circuit wiring diagramBB:Microcomputer line protection measurement and control deviceSFA:Selector switchTA:Current transformerFE:Lightning arresterFU:FuseQA:Circuit breaker

Secondary circuit diagram of 110kV power supply incoming lineBB:Microcomputer line protection measurement and control deviceSFA:Selector switchSFB:Selector buttonPGW:White lightPGG:Green lightPGR:RedlightQB:Travel switch

Secondary circuit diagram of power supply entry circuit breaker cabinetBB:Microcomputer line protection measurement and control deviceSFA:Selector switchPGW:White lightPGG:Green lightPGR:RedlightFU:FuseXG:Connecting pieceV:Rectifier bridgeCBO:Opening coilQA:Circuit breakerBG:Travel switchSFU:Transfer switch

Substation secondary circuit wiring diagramnote 1:When used for busⅡ power input, QA1 is changed to QA2note 2:When used for busⅡpower input, change terminals A17,C18 from the busbar integrated protection device to C23,C24QA:Circuit breakerTA:Current transformerFE:Lightning arresterFU:FuseBB:Microcomputer line protection measurement and control deviceBG:Travel switchSFU:Transfer switch

Composite electrical signal alarm circuit secondary wiring diagramSFA:change-over switchSFB:change-over buttonKFM:Intermediate relay

Secondary control circuit diagram of isolation switch and ground switch in combined electricSP:Limit deviceCX:Closing contactorSFA:selector switchSFB:selector button89KT:Thermal relayTX:Dc switching contactor

Primary main wiring of single bus segmentTA:Current transformerTV:Voltage transformerPG:Pressure GaugeQA:Circuit breakerQB:Disconnecting switchQC:Ground switch