GE Feeder Management Relay 750 User Manual

GE Multilin 750/760 Feeder Management Relay 3-13
3 INSTALLATION 3.2 ELECTRICAL
3
Figure 3–16: TRIP/CLOSE COIL SUPERVISION
In a similar manner, the 52b auxiliary contact only allows closing of the breaker when it is open. In this breaker state, the
52b contact is shorted and a trickle current will flow through the breaker’s close circuitry. When the breaker is closed, the
52b auxiliary contact is open and no trickle current will flow. When the breaker position monitoring inputs detect a closed
breaker, the close coil supervision monitoring function will be disabled.
When the
BRKR STATE BYPASS setpoint is “Enabled”, the trip and close coil supervision circuits can be arranged to monitor
the trip and close circuits continuously, unaffected by breaker state. This application requires that an alternate path around
the 52a or 52b contacts in series with the operating coils be provided, with modifications to the standard wiring as shown on
drawing 818730. With these connections, trickle current can flow at all times. If access to the breaker coil is available, as
shown in drawing A above, continuous coil monitoring regardless of breaker state is possible without using a resistor to
bypass the 52a/b contact.
A high speed solid state (SCR) output is also provided. This output is intended for applications where it is required to key a
communications channel.
Courtesy of NationalSwitchgear.com

GE Feeder Management Relay 750 Specifications

General

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