11-34 Testing and Troubleshooting Date Code 20010731
SEL-352-1, -2 Instruction Manual
7. Verify that the timer reading is approximately the CLSdo timer setting.
8. Repeat Steps 2 through 7 for B-phase and C-phase.
9. Repeat Steps 2 through 8 using the input assigned to MCLOSE.
10. For each test, the relay generated a sequential events record for the elements
programmed in Step 1. View the SER using the SER command. The RCApu
timer setting should be the difference between assertion of the CLOSE or
MCLOSE input and assertion of the CCA element. The CLSdo timer setting
should be the difference between the assertion of the CCA element and the
deassertion of the CCA element.
POINT-ON-WAVE CLOSE LOGIC TEST
Purpose: Verify the point-on-wave close logic (Reference: Figures 4.6–4.9).
Method: 1. While the relay can use two different closing schemes, only one is enabled at a
time. Select Scheme 2 by setting CLSLOG = 2 in the relay setting group. Point-
on-wave closing controls the output contacts faster than the processing interval of
the relay. Use an oscilloscope to monitor the voltages and the output contact
operation to verify the point at which the contacts close. Using the SET R
command, set the SER to trigger for the listed elements. Using the SET
command, set CLSA to control one of the fast high current interrupting output
contacts. One of these fast high current interrupting outputs must be used for
accurate timing.
The following test uses the relay event report to verify point-on-wave closing to
±2 ms.
Using the SET R command, set the SER to trigger for the listed elements. Using
the SET command, set MER to CLOSE+MCLOSE. Using the SET command, set
three outputs to follow the CTA, CTB, and CTC elements (i.e., OUT101 = CTA).
Verify the settings with the SHO commands.
Setting
Elements
CLSLOG, 59L,
CLSA, ZCApu,
PCApu, CLSdo,
TRIPA, CLOSE,
MCLOSE
CTA, TRIPA, X59L3, Y59L3, XNTA, YNTA,
XPTA, YPTA, CLOSE, MCLOSE
2. Apply a balanced 67 V to VAX, VBX, and VCX (each 120 out of phase).
3. Assert the CLOSE input to initiate point-on-wave closing.
4. Deassert the CLOSE input.
5. Verify that the CCA element asserted and deasserted by viewing the SER.
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