COMMISSIONING
52 OI 248 (EN) REV6 /REV7
7.6.3 Measuring the Contact Resistance
• 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 now 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 Ter-
minal Pads” on Page 40).
7.6.4 Measuring the Operating Times
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 se-
parate.
• 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.
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