1 INTRODUCTION
1 INTRODUCTION 1.1 OVERVIEW
a) PROTECTION
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3 separate phase time overcurrent (51) elements with 5 curve shapes:
Definite time, moderately inverse, normal inverse, very inverse, extremely inverse.
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Phase instantaneous (50) element
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Ground time overcurrent (51G) with 5 curve shapes:
Definite time, moderately inverse, normal inverse, very inverse, extremely inverse.
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Ground instantaneous (50G) element
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10 curves for each shape
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4 time multipliers for each curve
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3 different curve types: ANSI, IAC, IEC/BS142
b) INDICATORS
Trip:
Phase A, B, C instantaneous
Phase A, B, C time overcurrent
Ground fault instantaneous
Ground fault time overcurrent
Status: Relay in service
Service required
Phase pickup
Ground pickup
Current bargraph: 10 to 100%
c) OTHER
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Conventional 1 A or 5 A CT input
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Drawout case
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AC or DC control power
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Seal provision for tamper proof settings
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Output contacts:
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Trip
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Aux Trip
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Service Required
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(737 only) pickup, trip, cause of trip outputs;
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50A, 50B, 50C, 50N
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51A, 51B, 51C, 51N
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RS485 communications: settings, currents, status
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86 lockout
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Programmable block instantaneous on autoreclose.
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Ground Fault trip programmable to Aux. Trip relay, separate from Main trip.
GE Power Management
735/737 Feeder Protection Relay
1.1 OVERVIEW
1.1.1 FEATURES
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