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14
Equipment Description
PowlVac
®
STD Vacuum Circuit Breaker
IB-60201
Figure 6
Operation Sequence
Secondary
Disconnect
Makes
Motor “M”
Energized
Green Light
Energized
Close Spring
Charged
LS
Makes
LS
Breaks
LS
Breaks
LS
Makes
LCS
Makes
White Light
Energized
Motor “M”
Deenergized
“Y” Circuit
Disabled
Close Control
“CS/C” Makes
Close Coil “CC”
Energized
Close Spring
Discharged
LS
Breaks
LS
Makes
LS
Breaks
LS
Makes
52/b
Breaks
VCB Closed
White Light
Deenergized
Motor “M”
Energized
Prevents
Close Coil
Energization
Before
Spring is
Fully Charged
“Y” Coil
Energized
Close Coil “CC”
Deenergized
52/b
Breaks
52/a
Makes
“Y” Contact
Makes
Close Spring
Charged
“Y” Coil
“Seals In”
Green Light
Deenergized
Trip Circuit
Set Up
Red Light
Energized
LS
Makes
LS
Breaks
LS
Breaks
LS
Makes
White Light
Energized
Motor “M”
Deenergized
Release Close
Control Switch
“CS/C” Breaks
“Y” Coil
Deenergized
“Y” Contact
Breaks
Prevents
Pumping
if VCB Trips
Before Control
Switch is
Released