Characteristic
Operating time at twice current setting and time multiplier/
time dial setting of 1.0
Nominal (seconds) Range (seconds)
IEEE M Inverse 3.8 3.61 - 4.0
IEEE V Inverse 7.03 6.68 - 7.38
IEEE E Inverse 9.50 9.02 - 9.97
US Inverse 2.16 2.05 - 2.27
US ST Inverse 12.12 11.51 - 12.73
Note:
With the exception of the def
inite time characteristic, the operating times given are for a Time Multiplier Setting (TMS) or Time
Dial Setting (TDS) of 1. For other values of TMS or TDS, the values need to be modified accordingly.
Note:
For definit
e time and inverse characteristics there is an additional delay of up to 0.02 second and 0.08 second respectively.
You may need to add this the IED's acceptable range of operating times.
Caution:
On completion of the tests, you must restore all settings to customer specifications.
Chapter 21 - Commissioning Instructions P14x
508 P14xEd1-TM-EN-1
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