Types Of Withdrawable Circuit-Breakers Available For Powercube Modules; Mechanism And Electrical Operation - ABB VM1 Installation And Service Instructions Manual

6.6. Types of withdrawable circuit-
breakers available for PowerCube
modules
Complete the circuit-breaker selected with the
optional accessories indicated on the following pages.
vM1/a/P withdrawable circuit-breaker
Rated uninterrupted
ur isc
current (40 °C) [a]
W = 600
I = 150
kV kA
u/l = 205
ø = 35
PowerCube Pb1
25 1250
15
31.5 1250
W = Width of the switchgear.
I = Pole horizontal centre distance.
u/l = Distance between bottom and top terminal.
∅ = Diameter of the isolating contact.

6.7. Mechanism and electrical operation

To operate the circuit-breaker electrically, control power
must be available. The section entitled Racking describes
the application of control power through the secondary
disconnect when the circuit-breaker is in the Test and
Connect positions.
1. Inspect the initial state of the circuit-breaker to determine
type of circuit-breaker
2. Energize Control Power.
VM1/A/P 15.12.25 p150
VM1/A/P 15.12.32 p150
3. Close the circuit-breaker using the close push-button or by
4. Open the circuit-breaker using the manual OPEN push-
the operations available.
a. Close/Open Indicator.
b. Circuit-breaker position Test or Connect (or control
power applied externally if withdrawn).
a. Wait until "READY" lamp is on; approximately two minute
maximum depending on control voltage with 48 V DC
taking the longest amount of time.
b. Circuit-breaker is ready to perform C-O operation.
electrical signal to the magnetic actuator.
a. The magnetic armature moves down.
• Close/Open indicator changes to Closed.
• "READY" lamp illuminates again after about one
second.
b. Circuit-breaker is ready to perform O-C-O operation.
button or by electrical signal to the magnetic actuator.
a. The armature moves up.
• Close/Open indicator changes to Open.
• "READY" lamp will remain illuminated.
b. Circuit-breaker is ready to perform C-O operation.
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