Installation and Operating Instructions - Crompton Instruments

Parameter details
Range of Current Trip point (TripPoint)
Range of Hysteresis (Diff)
Range of Time Delay (TimeDelay)
Accuracy of Trip Point
5 — 120% of nominal input
1 — 15% of nominal input
0 to 30 seconds
±5% of nominal input
TYPE 32O — DIRECTIONAL (FORWARD) OVER POWER
Brief details
The relay will operate (trip) when the power level out of the “generator” on any phase exceeds
the selected value for the duration of the time delay. The relay will return to the “not tripped”
condition (provided that latched operation has not been selected) when the power level from the
“generator” on all phases falls below the selected trip point by at least the hysteresis value. The
time delay is not used on the transition to the “not tripped” condition.
The function is intended to detect conditions such as generator overload.
Parameters
The following parameters must be specified for the operation of the directional power (forward
or export) relay::
●
(SPR-014) The maximum permitted power on any phase out of the “generator”.
• (SPR-013) The maximum permitted system power out of the “generator”.
●
The time for which the directional power conditions must be true.
●
The power level below the previously defined maximum that all phases from the
“generator” must exceed to return operation to the not tripped condition following a
trip. (Hysteresis)
Parameter details
Range of Directional Power trip (TripPoint) 3 — 120% of nominal power per phase (line)
Range of Hysteresis (Diff)
1 — 15% of nominal power per phase
Range of Time Delay (TimeDelay) 0 to 30 seconds
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