Measuring The Contact Resistance; Measuring The Operating Times - GE GL 311 F3/4031 P/VE Operating Instructions Manual

C
OMMISSIONING
7.6.3

Measuring the Contact Resistance

7.6.4

Measuring the Operating Times

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• Connect the measurement and supply leads to the high voltage
terminal pads.
• Measure the contact resistance (> 100A DC).
• Compared the measured contact resistance with the reference
values in the routine test certificate and enter it in the checklist.
If the contact resistances are higher than the values given in the
routine test certificate, repeat the measurement on the terminal
pad mounting plate.
• Connect the measurement and supply leads to the terminal pad
mounting plate.
• Measure the contact resistance (> 100A DC).
• Compared the measured contact resistance with the reference
values in the routine test certificate and enter it in the checklist.
If these measured values correspond to those in the routine test
certificate, then the error is due to incorrect installation of the high
voltage terminal pads (see "Mounting the High Voltage Terminal
Pads" on Page 45).
Closing time:
From the start of the electrical tripping pulse until the contacts
touch.
Opening time:
From the start of the electrical tripping pulse until the contacts
separate.
• Connect the operating time measuring device to the pole column
terminal pads.
• Carry out a closing operation and measure the pole column
operating times.
• Carry out an opening operation and measure the pole column
operating times.
• Compare the measured operating times with the reference values
in the routine test certificate and enter them in the checklist.
OI 250 (EN) REV7
/REV6