MicroVersaTrip Plus™ and PM ™Trip Units
Rating Plugs
The same interchangeable rating plugs are used in all of the
MicroVersaTrip Plus™ and MicroVersaTrip PM™ trip units
across the entire Power Break® I I breaker product l ine. Rating
plugs are the key devices that establish the current rating of
the breaker. They provide an essential scaling function for the
unit's microprocessor. and ensure maximum accuracy. They
a lso provide an external jack for connection to an external
battery pack.
Rating plugs have rejection features that allow them to be
inserted only with breakers containing the correct current
sensors. Rating plugs for the enhanced MicroVersaTrip Plus
and M icrosVersaTrip PM trip u n its cannot be use with Spectra
RMS™ molded case circuit breakers, but are compatible with
Power Break and Type AKR breakers with M icroVersaTrip Plus
and MicroVersaTrip PM trip units. See Table 23.1
M icroVersaTrip rating plug
Table
23.1
Rating Plug And Current Sensor Rating
Envelope Frame Max.
Size
Rating
(Amps)
800
800,1600
2000
1600
2000
2500
3000
3000
4000
4000
S= Sensor amp rating
X= Rating plug amps
Sensor
Rating
(Amps)
(S)
200
400
800
1000
1600
2000
1000
2000
2500
3000
4000
Sensor Rating
Plug Amps IX)
100, 150, 200
150, 0. 225 ,250, 300, 400
300.400,450,500.600,700,800
400,600,800,1000
600,800, 1000,1100,1200, 1600
800, 1000, 1200,1500,1600,2000
400,600,800, 1000
800,1000.1200.1500,1600,2000
1600,2000,2500
2000,2500,3000
1600,2000,2500,3000, 3600,4000
Current Sensors
Toroidally wound current sensors are furnished for all major
protective functions and for use with M icroVersaTrip PM trip
u nits. Toroidal sensors, including a second air-core winding,
are provided with the high-range instantaneous function.
Current sensors are factory insta l led and a re not changeable
in the field. There are 11 current ratings for the Power Break
II breaker line through 4000 amps. See Table 23.1 for current
ratings. Rating plugs must be coordinated with the current
sensor rating (S) listed on the face of the rating plug.
Typical toroidolly wound current sensor
Accessory Configu ration
Activation of the Bell Alarm - Alarm Only and Bell Alarm with
Lockout are controlled by switch setting on the rear of the
trip unit. To change the conditions which activate these ac
cessories, configure the trip unit switch setting as described
below.
Rear of tri p unit
Table
23.2
Accessory Switch Setting
Switch
Factory
Function
Setting
1
Disable
Shunt trip activates Bell Alarm - Alarm Only
2
Disable
UVR Trip activates Bell Alarm- Alarm Only
3
Enable
Protection trip activates Bell Alarm - Alarm Only
4
Disable
Shunt Trip Activates Bell Alarm/ Lockout
5
Disable
UVR trip activates Bell Alarm/Lockout
6
Enable
Protection trip activates Bell Alarm/ Lockout
23
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