5-36 750/760 Feeder Management Relay GE Multilin
5.6 S5 PROTECTION 5 SETPOINTS
5
5.6.2 PHASE CURRENT
a) MAIN MENU
PATH: SETPOINTS ÖØ S5 PROTECTION Ö PHASE CURRENT
Phase overcurrent protection comprises two time overcurrent, two instantaneous overcurrent, and a phase directional ele-
ment. The directional element determines whether current flow is in the forward or reverse direction, as determined by the
connected polarity of the input CTs and the Maximum Torque Angle selected for the phase directional element. Each phase
overcurrent element can be programmed to either disable directionality or provide a trip for current flow in the forward/
reverse direction only. Two elements allow the use of ‘Loset’ and ‘Hiset’ detectors in autoreclose applications, zone-selec-
tive (blocking) schemes, and distinct settings for faults in different directions. Phase overcurrent protection elements can be
blocked individually or by logic inputs.
b) PHASE TIME OC
PATH: SETPOINTS ÖØ S5 PROTECTION Ö PHASE CURRENT Ö PHASE TIME OC 1(2)
Phase Time Overcurrent 1 and 2 are identical elements. Each consists of the equivalent of three separate time overcurrent
relays, ANSI Device 51P, with identical characteristics. These elements can be controlled by the phase directional element,
providing operation for current flow in the permitted direction only. Voltage restrained operation which reduces the pickup
level with reduced voltage is also available.
îš„ PHASE CURRENT
îš„ [ENTER] for more
îš„ PHASE TIME OC 1
îš„ [ENTER] for more
See below
îš„ PHASE TIME OC 2
îš„ [ENTER] for more
îš„ PHASE INST OC 1
îš„ [ENTER] for more
See page 5–38.
îš„ PHASE INST OC 2
îš„ [ENTER] for more
îš„ PHASE DIRECTIONAL
îš„ [ENTER] for more
See page 5–39.
îš„ PHASE TIME OC 1
îš„ [ENTER] for more
PHASE TIME OC 1
FUNCTION: Trip
Range: Disabled, Trip, Trip & AR, Alarm, Latched Alarm,
Control
PHASE TIME OC 1
RELAYS (3-7): -----
Range: Any combination of 3 to 7 Auxiliary relays
PHASE TIME OC 1
PICKUP: 1.00 x CT
Range: 0.05 to 20.00 x CT in steps of 0.01
PHASE TIME OC 1
CURVE: Ext. Inverse
Range: see Table 5–4: TOC Curve Selections on page
5–32 for values
PHASE TIME OC 1
MULTIPLIER: 1.00
Range: 0.00 to 100.00 in steps of 0.01
PHASE TIME OC 1
RESET: Instantaneous
Range: Instantaneous, Linear
PHASE TIME OC 1
DIRECTION: Disabled
Range: Disabled, Forward, Reverse
PHASE TIME OC 1 VOLT
RESTRAINT: Disabled
Range: Enabled, Disabled
ENTER
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Courtesy of NationalSwitchgear.com
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