GE IS200VPROH1BCD IS200VPROH2B Protection card

Description

GE General Electric Technical Specifications: IS200VPROH1BCD

For applications where the breaker may be closed directly, without using the

760 to provide the closing signal to the breaker, enabling this setpoint will use

breaker state to determine if a manual close has occurred.

The 760 uses the detection of a manual close to disable the autoreclose

IS200VPROH1BCD scheme to prevent reclosing onto a fault. Also, if the Autoreclose scheme is in

the lockout state, a successful manual close would result in the autoreclose

scheme being automatically reset after the AR BLOCK TIME UPON MANUAL CLOSE

time has expired.

When Enabled, this setpoint uses the detection of the breaker going from the

IS200VPROH1BCD open state to the closed state to determine if a manual close has occurred.

The breaker state is determined by the 52a/b contact feedback to the 760.

When Disabled, only close commands sent via the 760 will be considered as a

manual close for the autoreclose scheme logic.

This timer is used to set the maximum time interval allowed for a single reclose

shot. It is started whenever a reclosure is initiated and is active when the

IS200VPROH1BCD scheme is in the ‘Reclosure In Progress’ state. If all conditions allowing a

breaker closure are not satisfied when this timer expires, the reclosure initia

tion is abandoned. Any combinations of the following conditions block the

IS200VPROH1BCD breaker from closing.

Breaker status logic inputs (52a or 52b contact) fail to report the breaker has

opened.

The ‘Block 2 Close Relay’ logic input function is asserted.

The synchrocheck feature is blocking breaker closes.

NOTE: This timer must be set to a delay less than the autoreclose reset

timer.

Select the relays required to operate while the front panel RECLOSURE IN

PROGRESS indicator is on. This indicator is on when the autoreclose scheme

has been initiated, but has not yet sent a close command. This output could be

used to block the operation of a transformer tap changer during a reclosure

sequence.

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