
Connecting the Circuit Breaker
4-6
72A-1898 Rev. A 11/01
Monday
, November 26, 2001 1:09 pm
Connecting the Circuit Breaker
Leads for measuring the Main Contact current are connected via a
clip-on probe to the current transformer secondary of the phase being
measured. If testing a live tank breaker, where a separate free-standing
CT is used, it should be possible to position the TDR9000 so that cable
lengths suffice to make the connection. The connections to the breaker
are:
1.
Connect the test set ground connection to the circuit breaker ground.
2.
Connect a Doble current probe (Doble P/N 401-0055) to a
CT secondary for each phase being measured to record the Main
Contact currents and then connect the current probe leads to the
analog channels on the TDR9000 Event module.
3.
Connect the current probes (Doble P/N 401-0055) to selected relay
coil circuits and then connect the leads to Doble probes and into the
Event module Analog channels, as required.
This records the selected relay coil currents.
4.
Connect a set of Analog cables across the DC supply switch and into
the TDR9000 Event module Analog connector.
This records the DC supply voltage.
5.
Connect Auxiliary Contact cables across the selected contacts and
into the TDR9000 Event module Auxiliary connector.
This records the selected contact states.
6.
Connect:
• Trigger In cables across the 52CS/T contacts if using the
TDR9000 with a Trigger option and if Trigger In is set as the
trigger source in the Test Plan.
Otherwise
• Connect Auxiliary Contact cables across the 52CS/T contacts
ensuring that Aux Contact is set as the trigger source in the
Test Plan.
When the Trigger In or Connect Auxiliary Contact cable is used as an
external trigger signal, it records the 52CS/T contact state.
Содержание TDR9000
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