MN008006EN Manual
Efective March 2021
NOVA LBS Load Break Switch
14
www.eaton.com/cooperpowerseries
OPERATION
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This equipment is not intended to protect human life. Follow all locally
approved procedures and safety practices when installing or operating
this equipment. Failure to comply can result in death, severe personal
injury, and equipment damage.
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Hazardous voltage. Do not rely on the open position of the yellow
operating handle or the contact position indicator; it does not ensure
that the line has been de-energized. Always establish a visible
disconnect. Failure to follow proper safety practices can result in
contact with high voltage, which will cause death or severe personal
injury.
Electrical Operation
The NOVA LBS Load Break Switch uses an interface circuit located in the
mechanism housing. The electronic interface circuit controls the open
and close signals to the spring-loaded mechanism of the switch.
Manual Closing/Loading
The power required for the closing operation of the NOVA LBS Load
Break Switch is provided by charging the closing spring using a charging
motor. With charging complete, the switch will close automatically.
Closing
By sending an electrical close command to the NOVA LBS Load Break
Switch via the LBC control, the charging motor is powered on 24V DC,
and after the charging spring is fully charged, the mechanism is engaged
instantly.
Opening
By sending an electrical close command to the NOVA LBS Load Break
Switch through the LBC control, the opening solenoid activates the
opening spring and the mechanism is engaged instantly. The NOVA LBS
Load Break Switch uses a hydraulic damper to help absorb some of the
opening force.
OPEN/CLOSE Contact Position Indicator
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Hazardous voltage. Never rely on the open position of the operating
handle or the contact position indicator; it does not ensure that the
line is de-energized. Follow all locally approved safety practices. Failure
to comply can result in contact with high voltage, which will cause death
or severe personal injury.
The OPEN/CLOSED contact position indicator consists of a red CLOSED
indicator and a green OPEN indicator located on the bottom of the
mechanism housing (Figure 14).
Hotstick Operation (Manual Open, Electrical Close
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Hazardous voltage. Always use a hotstick when working with this
equipment. Failure to do so could result in contact with high voltage,
which will cause death or severe personal injury.
The NOVA LBS Load Break Switch Key can be manually opened by using
a hotstick to pull down the GREEN manual OPEN handle, located on the
front of the Switch (Figure 14). To close the switch after a manual
opening, first push up the GREEN manual-open handle, then using the
LBC control, close the NOVA LBS. To perform a manual close, pull down
the GREEN manual-open handle 7 times.
IMPORTANT
If the manual GREEN OPEN handle remains in the down position, the
key cannot be closed manually or electrically.
Figure 14.
NOVA LBS switch identification board and manual opening
and closing handle.
Opening Handle
Closing Handle
Position indicator
