Instruction Manual

DIGITMR S2 USER’S MANUAL REV 1
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3.11 Working with Breaker Test Plans
A breaker test plan is comprised of all circuit-breaker performance specifications (stroke,
velocity, and contact time). Following is a typical list of operating parameters contained in a test
plan:
• Maximum and minimum Contact Trip Time
• Maximum and minimum Contact Close Time
• Maximum Contact Spread Time
• Maximum and minimum Resistor On Time
• Maximum and minimum Stroke
• Maximum and minimum Trip/Close Velocity
• Maximum and minimum Over Travel (Open/Close)
• Maximum and minimum Bounce Back (Open/Close)
• Trip Analysis Points
• Close Analysis Points
Circuit breaker test plans can be created on a PC using the included VCBA S2 software (please
see the VCBA S2 Software Manual for further information). Test plans can then be transferred
from the PC to the DigiTMR S2 via the USB interface. The DigiTMR S2 can store up to 100 circuit
breaker test plans in its Flash EEPROM.
By recalling a test plan before testing, the user does not have to set analysis points to calculate
the Trip or Close velocity of the circuit breaker contacts. Since the test plan contains the
breaker test parameters, the test report will also display the “Pass” or “Fail” status for each
parameter tested based on comparing the test results with the parameters in the test plan. A
typical test report with “Pass” or “Fail” indicators is shown in Appendix D.