GE Industrial Solutions Spectra RMS Molded Case User Manual

Page 50

GEH-702 Users Manual

Appendix F. Replacing MicroVersaTrip

with microEntelliGuard

There are occasions when a field update or repair will
require replacement of a Spectra RMS Molded Case
circuit breaker with a MicroVersaTrip

Trip Unit with a

Spectra RMS Molded Case circuit breaker with a
microEntelliGuard

Trip Unit. There are two cases

The new Spectra RMS Molded Case Circuit breaker with
microEntelliGuard

will be a direct replacement for the

old circuit breaker. A standard replacement procedure
can be used following all safety procedures.

to consider when performing this replacement . The

replacement procedures are described in this appendix.

For either case the first step is to identify the appropriate
Molded Case circuit breaker with microEntelliGuard

Trip Unit to use in the replacement . The figure provides
a conversion map from a MicroVersaTrip

(MVT) to a

microEntelliGuard

(MET). This figure only helps identify

an equivalent breaker. Should additional features be
desired during the replacement contact a GE sales
representative or distributor for assistance.

Figure 20. MicroVersaTrip

vs. microEntelliGuard

™

Conversion

The first case to consider is a MicroVersaTrip

unit that

does not use POWERLEADER

communications. If the

trip unit does not use the Commnet communications
port for POWERLEADER

or other communications, the

replacement method is strictly a physical replacement.

Warning - High voltage and high currents are present

when working with circuit breaker replacement . Be
sure all power is removed before replacing the existing
circuit breaker. Before reapplying the power, be sure to
check the integrity of all connections.

The second case to consider is replacement of a
MicroVersaTrip

breaker that is connected to a

communications port. When replacing a MicroVersaTrip

breaker that uses the communication port, minor wiring
updates are required. The block diagram in Figure 21
shows the typical MicroVersaTrip

connection.

Figure 21. MicroVersaTrip

Commnet Wiring

Figure 22. microEntelliGuard

Modbus Wiring