GE DS200TCDAH1B Vector signal transceiver

in case of earth fault in the area between the opened circuit-breaker and the moulded-case circuit-breakers, only the main LV circuit-breaker opens; - in case of earth fault in the load area, only the moulded–case circuit-breaker immediately on the supply side opens. In order to make the MV circuit-breaker open, it is sufficient to send a signal to its opening coil. As an example, here is given a single line wiring diagram for the control of the opening coil of the MV release using a signaling contact (K51/p1) of the remote signaling module PR120/K:Caption AR: REF 542 Protection Unit BB1, BB3: Auxiliary contacts TR1: AC/DC converters MO1: Opening coil K51/p1: Contact of PR120/K module

The circuit-breaker opening

 commanded by the REF542 protection unit following up the trip of any of the protections, occurs through the closing of AR contact. Then the opening signal is transmitted to the coil MO1 through the rectifier TR1. The auxiliary contacts BB1 and BB3 (able to report the circuit-breaker status) can be used, for example, to prevent the opening coil from being supplied when the circuit-breaker is open or to create interlocks. To command the opening through a circuit-breaker type EMAX, it is possible to use one contact of the signaling modules PR120/K (internal) or PR021/K (external) controlled by PR123 LSIG trip unit. These signaling modules are able to signal from remote the alarms and the trips of the circuit-breaker and can be programmed according to the events to be signaled.

In detail, to realize what described above

 it is necessary to use: - a SACE Emax air circuit-breaker equipped with an electronic trip unit PR123/P LSIG; - a PR120/K module (or PR021/K) mounted on the trip unit; - a homopolar toroid to be mounted on the earthing of the star center of the transformer and connected to the electronic trip unit. As pointed out, in case of an earth fault occurring in the area of the plant between the transformer and the main LV circuit-breaker, it is necessary that the MV circuit-breaker opens so that the fault can be disconnected. To command the opening of the MV circuit-breaker, it is necessary that the contact K51/p1 of PR120/K module is set as followed: - reference event: “Gext alarm (blocked trip)” - status: NO (normally open) - latching function: not selected - time-delay upon closing: selected

 Company product range

----------------------Ruichang Mingsheng Automation Equipment Co., Ltd----------------------

PLC module, programmable controller, CPU module, IO module, DO module, AI module, DI module

Network communication module,

Ethernet module, motion control module, analog input module, analog output module, digital input module, digital output

Module, redundancy module, power module, relay output module, relay input module, processor module