GE IS200UCVBG1A Communication Monitor General Electric

Description

GE General Electric Technical Specifications: IS200UCVBG1A

The 750 and 760 have four channels for AC voltage inputs, each with an isolating transformer. Voltage trans

IS200UCVBG1A formers up to a maximum 5000:1 ratio may be used. The nominal secondary voltage must be in the 50 to 240

V range.

The three phase inputs are designated as the “bus voltage”. The bus VT connections most commonly used,

wye and delta (or open delta), are shown in the typical wiring diagram. Be aware that these voltage channels

IS200UCVBG1A are internally connected as wye. This is why the jumper between the phase B terminal and the Vcom terminal

must be installed with a delta connection

Supervision of a breaker trip coil requires the relay supervision circuit to be wired in parallel with the 1 TRIP

contact. Likewise, supervision of the close coil requires the supervision circuit to be wired in parallel with the 2

IS200UCVBG1A CLOSE contact. Each connection places an impedance across the associated contact, which allows a small

trickle current to flow through the related trip and close coil supervision circuitry. For external supply voltages in

the 30 to 250 V DC range, this current draw will be between 2 to 5 mA. If either the trip or close coil supervision

circuitry ceases to detect this trickle current, the appropriate failure will be declared by the relay.

When the BREAKER STATE BYPASS setpoints are disabled, the logic only allows a trip circuit to be monitored

when the breaker is closed and a close circuit to be monitored when the breaker is open.

Circuit breakers equipped with standard control circuits have a 52a auxiliary contact which only allows tripping

of the breaker when it is closed. In this breaker state, the 52a contact is closed and a trickle current will flow

through the trip circuitry. When the breaker is open, the 52a auxiliary contact is also open and no trickle current

will flow. When the breaker position monitoring inputs detect an open breaker, the trip coil supervision monitor

ing function will be disabled.

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Lead time problem
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