GE IS200VTURH2B IS200VTURH2BAB VME turbine card

Description

GE General Electric Technical Specifications: IS200VTURH2B

Test Connections per Figure 17–2: RELAY TEST WIRING – DELTA CONNECTION on page 17–4.

A negative sequence voltage can be created by injecting a single phase-phase voltage, or a set of two phase

IS200VTURH2B phase voltages with a known negative sequence component. For a single phase-phase injection the negative

sequence voltage magnitude is the injected voltage divided by √3.

IS200VTURH2B Pickup

1. Inject a negative sequence voltage = 0 into the bus voltage input of the relay. The PICKUP indicator should

be off.

2. Slowly raise the voltage until the PICKUP indicator comes on. This is the pickup level.
3. Lower the voltage until the PICKUP indicator goes out. This is the reset voltage, which should be 2% of VT

less than the pickup level.

Indications and Operations are as outlined under Phase Time Overcurrent 1.

IS200VTURH2B Blocking From Logic Inputs:

1. Inject voltage to cause a pickup.
2. Assert a logic input to provide a “Block Neg Seq Voltage”. The PICKUP indicator should immediately go

out.

3. Repeat steps 1 and 2 for logic input “Block 1 TRIP Relay” as required.

IS200VTURH2B Timing:

1. Connect the “Stop Trigger.”
2. Set the voltage source to the required test voltage, then turn off the voltage.
3. Reset the timer. Turn the voltage on and measure the operating time. Repeat steps 2 and 3 four more

times and obtain an average of the time intervals.

4. Reset the relay and disconnect the “Stop Trigger.

Test Connections per Figure 17–1: RELAY TEST WIRING – WYE CONNECTION on page 17–4.

Pickup with One Phase For Operation:

1. Inject Van = Vbn = Vcn = nominal voltage into the bus voltage input of the relay. The PICKUP indicator

should be off.

2. Slowly lower Van until the PICKUP indicator comes on. This is the pickup voltage.
3. Continue to lower Van until the PICKUP indicator goes out. This is the programmed Minimum Operating

Voltage level minus 2% of VT.

4. Raise Van until the PICKUP indicator comes on, and continue to increase until the indicator goes out. This

is the reset voltage, which should be the pickup value plus 2% of VT.

5. Repeat steps 1 through 4 except adjust Vbn and Vcn in turn.

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