GE IS200TSVCH1A IS200TSVCH1AJE MARK 6 General Electric Board

Description

GE General Electric Technical Specifications: IS200TSVCH1A

The relay calculates an estimate of the per-phase wear on the breaker contacts by measuring and integrating

IS200TSVCH1A the arcing current squared passing through the contacts while they are opening. These per-phase values are

added to accumulated totals for each phase and compared to a programmed threshold value. When the

threshold is exceeded in any phase, the relay can be used to generate an alarm. The threshold value can be

set to a maintenance specification provided by the breaker manufacturer.

Circuit breakers typically have both a 52a (breaker tripped = open) contact and a 52b (breaker tripped =

closed) contact. Either or both of these contacts can be connected to the relay logic inputs, from which breaker

IS200TSVCH1A status is detected. Interpretation of breaker status depends on which 52 contacts are installed. See Sections

5.2.3: SYSTEM STATUS INDICATORS on page 5–2 and 10.3: BREAKER FUNCTIONS on page 10–4 for

more information on 52a (52b) contacts. If neither 52a nor 52b contacts are installed, correct breaker operation

IS200TSVCH1A will not be verified and a breaker operation alarm can never occur.

A breaker operation failure can be caused by either of the following conditions if BREAKER OPERATION FUNCTION

is set to Alarm or Control.

• The breaker does not respond to a trip command within the programmed breaker operation delay time.
• The breaker does not respond to a close command within the programmed time.

When a breaker operation failure is declared, the selected output relays will operate, but the 2 CLOSE relay

and 760 autoreclosure will be inhibited. If the 760 already has a reclosure scheme in progress, it will be sent to

lockout.

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