12.10
SEL-734 Meter Instruction Manual Date Code 20090730
Testing and Troubleshooting
Testing Methods and Tools
Testing Via Output Contacts
You can set the meter to operate an output contact for testing a single element.
Use the SET L command (SEL
OGIC control equations) to set an output
contact (e.g., OUT101 through OUT103 for Model 07340ES2-XX) to the element
under test. The available elements are the Meter Word bits referenced in
Table 9.4.
For example, to test the phase undervoltage element 27A via output contact
OUT103, make the following setting:
OUT103 = 27A
Do not forget to reenter the correct meter settings when you are finished
testing and ready to place the meter in service.
Testing Via Sequential Events Recorder
You can set the meter to generate an entry in the Sequential Events Recorder
(SER) for testing meter elements. Use the SET R command to include the
element(s) under test in any of the SER trigger lists (SER1 through SER3).
See Section 6: Power Quality and Event Analysis.
To test the phase undervoltage element 27A with the SER, make the following
setting:
SER1 = 27A
Element 27A asserts when phase voltage is below the pickup of the phase
undervoltage element. The assertion and deassertion of the element is time
stamped in the SER report. Use this method to verify timing associated with
undervoltage elements, input/output operation, etc. Do not forget to reenter
the correct meter settings when you are ready to place the meter in service.
Table 12.3 IEEE Recommended Test Pulses
Value of Current Recommended Number of Pulses
0.25 A 174
2.50 A 1736
5 A 3472
10 A 7944
20 A 13,889
ASSUMPTIONS
Kh 1,8 Wh/pulse
Vo l t a g e 1 2 0
Percent Error 0.02%
Courtesy of NationalSwitchgear.com
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