User guide

DIGITMR USER’S MANUAL REV 3
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3.2 General Procedures
The main steps for timing a circuit breaker are listed in Figure 10 below.
Figure 10. DigiTMR General Operating Procedures
NOTE
To reduce the possibility of damaging the DigiTMR due to static discharge in high
voltage substations, it is recommended that one side of the breaker’s bushings be
grounded for the contact channels.
3.3 Timing Breakers in Quick-Shot Mode
The DigiTMR can provide OPEN or CLOSE times only in Quick-Shot Mode. The DigiTMR can
initiate the OPEN or CLOSE tests, and then the test report will show the OPEN or CLOSE coil
current reading and waveform. If the DigiTMR is operated in Quick-Shot mode using the
External Trigger, no coil current reading or waveform will be recorded.
Get Test Results
• View or print tabulated results
• Print graphic results
• Save timing shot
Time Breaker
• Select DigiTMR test
• Operate Breaker
Connect the DigiTMR
• Ground the DigiTMR (see note)
• Connect the DigiTMR cables to the circuit breaker
• Install the transducer and cable
Apply Power
• Turn on the power for the DigiTMR. Once the unit
goes through its start-up cycle, the “Start-Up”
menu will be displayed.
• Perform self test (hook-up test, cable test) if
necessary