GE Feeder Management Relay 750 User Manual

GE Multilin 750/760 Feeder Management Relay 5-79
5 SETPOINTS 5.7 S6 MONITORING
5
b) CURRENT DEMAND
PATH: SETPOINTS ÖØ S6 MONITORING ÖØ DMND Ö CURRENT
The current demand for each phase is calculated individually, and the demand for each phase is monitored by comparing to
a single current demand pickup value. If the current demand pickup is exceeded by any phase, the relay can cause an
alarm or signal an output relay.
For the
THERMAL 90% RESPONSE TIME setpoint, enter the time required for a steady state current to indicate 90% of the
actual value. This setpoint allows the user to approximately match the response of the relay to analog instruments. For the
TIME INTERVAL setpoint, enter the time period over which the current demand calculation is to be performed.
Figure 5–41: CURRENT DEMAND LOGIC
 CURRENT
 [ENTER] for more
CURRENT DMND
FUNCTION: Disabled
Range: Disabled, Alarm, Latched Alarm, Control
MEASUREMENT TYPE:
Thermal Exponential
Range: Thermal Exponential, Block Interval, Rolling
Demand. See page 5–78 for details.
THERMAL 90% RESPONSE
TIME: 15 min
Range: 5 min, 10 min, 15 min, 20 min, 30 min, 60 min
Seen only if MEASUREMENT TYPE is "Thermal
Exponential"
TIME INTERVAL:
20 min
Range: 5 min, 10 min, 15 min, 20 min, 30 min, 60 min
Seen only if MEASUREMENT TYPE is "Block
Interval" or "Rolling Demand"
CURRENT DMND
RELAYS (3-7): -----
Range: Any combination of the 3 to 7 Auxiliary Relays.
See 5.6.1: Overview on page 5–32 for details.
CURRENT DMND
PICKUP: 1000 A
Range: 10 to 1000 A in steps of 1
See 5.6.1: Overview on page 5–32 for details.
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Courtesy of NationalSwitchgear.com

GE Feeder Management Relay 750 Specifications

General

Brand	GE
Model	Feeder Management Relay 750
Category	Protection Device
Language	English