CHAPTER 5: SETTINGS GROUPED ELEMENTS
F35 MULTIPLE FEEDER PROTECTION SYSTEM – INSTRUCTION MANUAL 5-237
5
The phase instantaneous overcurrent element can be used as an instantaneous element with no intentional delay or as a
definite time element. The input current is the fundamental phasor magnitude. For timing curves, see the publication
Instantaneous Overcurrent (IOC) Element Response to Saturated Waveforms in UR Series Relays (GET-8400A
).
FUNCTION — This setting enables and disables the phase instantaneous overcurrent protection element.
SOURCE — Selects the signal source for the phase instantaneous overcurrent protection element.
PICKUP — Specifies the phase instantaneous overcurrent pickup level in per-unit values.
DELAY —Delays the assertion of the PHASE IOC OP operands. It is used to achieve timing coordination with other elements
and relays.
RESET DELAY — Specifies a delay for the reset of the phase instantaneous overcurrent element between the operate output
state and the return to logic 0 after the input passes outside the defined pickup range. This setting is used to ensure that
the relay output contacts are closed long enough to ensure reception by downstream equipment.
BLOCK A — Assertion of the operand assigned to this setting block’s phase A of the phase instantaneous overcurrent
element.
EVENTS — Enables and disables the logging of phase instantaneous overcurrent events in the sequence of events recorder.
Figure 5-125: Phase instantaneous overcurrent 1 logic
5.7.4 Neutral current
5.7.4.1 Menu
SETTINGS GROUPED ELEMENTS SETTING GROUP 1(6) NEUTRAL CURRENT
NEUTRAL CURRENT
NEUTRAL TOC 1
See below
NEUTRAL TOC 6
NEUTRAL IOC 1
See page 5-239
NEUTRAL IOC 12
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