GE Industrial Solutions WavePro Low-Voltage Power Circuit Breakers - Manual (Page 13)

MicroVersaTrip Plus™ and MicroVersaTrip PM™ Trip Units
Chapter 1. Introduction
5
power source and a cable. The LCD is energized
when the cable is plugged into the rating plug test
receptacle.
1-6 Trip Unit Information
Trip Unit Label Information
Following are descriptions of the various label information
on the front of the Trip Unit, as illustrated in Figure 2.
• Extreme top -- circuit breaker series and serial number
of the breaker, unless it is a replacement unit.
• Upper-left center – Trip Unit serial number, such as
RMS9D008587 .
• Upper-right center -- Trip Unit date of manufacture
code, such as P729= .
• Lower-left center -- catalog number of the Trip Unit,
such as K440LSGPM .
• Lower-right center-- sensor rating of the Trip Unit, such
as SENSOR (CT) = 4000A .
• Below battery cover -- indicates whether the unit is
MicroVersaTrip Plus or MicroVersaTrip PM.
Figure 2. Label information on the front of the Trip Unit.
Function Keys
The Trip Unit has four programming keys and a battery
enable key. These are marked
FUNCTION , SELECT , VALUE ,
ENTER , and BATTERY , as illustrated in Figure 3. All setup,
status, and metering functions and displays are accessed
through these keys. As each set point is entered, it is stored
in the Trip Unit’s nonvolatile memory, so subsequent loss
of power does not result in loss or change of any settings.
FUNCTION SELECT
BATTERY
VALUE ENTER
Figure 3. Function key placement on face of Trip Unit.
The functions of the five keys are
• FUNCTION -- selects the mode of display.
• SELECT -- chooses the next item for display.
• VALUE -- selects the phase-to-phase display or allows
changing of set points.
• ENTER -- stores set points.
• BATTERY -- powers the Trip Unit from the internal
battery.
Chapter 2 describes the operation of these keys in detail.
Battery Function
Pressing the BATTERY key on the face of the Trip Unit
powers the unit from its internal battery. Battery power is
maintained for 30 seconds after the last key is pressed.
This self-powered mode allows setting up the Trip Unit or
viewing trip targets when the breaker is de-energized and
external control power is unavailable. All normal setup,
meter, and status functions can be performed with battery
power.
The battery is intended to power the Trip Unit when it is
otherwise unpowered. At low line currents (less than 20%
of the sensor rating) the Trip Unit display is not active.
Pressing the
BATTERY key under these conditions will not
power the Trip Unit.
Note that at temperatures above 40° C, the BATTERY key
may have to be held down for up to 5 seconds for the Trip
Unit to be powered.