OMICRON 225
Off-service diagnostic methods
7. Repeat steps 1 to 6 for all phases.
Disconnection
Do not disconnect the circuit breaker but leave it connected for performing the next test. For
disconnecting the circuit breaker, see "Disconnection" on page 245.
Table 17-67: Contact Resistance measurement data
Data Description
Channel Current +/–
Phase Measured phase
IDC
1
1. Only available if the Compensate ground loop resistance check box is selected.
DC test current with the circuit breaker open
VDC
1
Measured voltage with the circuit breaker open
R open
1
Measured resistance with the circuit breaker open
I DC DC test current with the circuit breaker closed
V DC Measured voltage with the circuit breaker closed
Rclosed
1
Measured resistance with the circuit breaker closed
R meas Measured contact resistance
Assessment Measurement assessment
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