MN008006EN Manual
Efective March 2021
NOVA LBS Load Break Switch
www.eaton.com/cooperpowerseries
11
Remove NOVA LBS from Service
1.
Close all three by-pass switches
2.
Pull down the GREEN operating lever with a hookstick. The
GREEN operating lever is located under the hail protection
of the switch.
The control will detect that the switch is open and activate an
OPEN/Locked indication on the front panel.
3.
Open the source and load disconnect switches.
4.
Disconnect the battery from the control.
CAUTION
Improper operation of the equipment. Disconnect all control power
sources before disconnecting or reconnecting the control cable to the
control. Failure to comply could result in improper operation of the
switch when disconnecting or reconnecting the control cable to the
control.
IMPORTANT
The disconnect switches for AC power and measurement connections
are needed to isolate the control for testing and maintenance purposes.
1.
Remove the measurement and AC power connections from the
control using a separate disconnect switch.
CAUTION
Hazadous voltage. Open CT secondaries can generate high voltages.
Contact with disconnected CT cable pins can cause electrical shock,
which can result in personal injury. Before disconnecting the control
cable, open the NOVA LBS switch contacts and open the disconnect
switches.
CAUTION
Disconnect the battery and external power sources from the control
and then remove the control cable at the control end before removing it
from the NOVA LBS Load Break Switch extremity.
1.
Disconnect the control cable from the NOVA LBS Load Break
Switch.
2.
Follow the utility's standard procedures regarding the removal
from service of the NOVA LBS switch.
•
Eaton recommends carrying NOVA LBS in the closed
position to maximize the unit's operational performance.
NOVA LBS Load Break Switch Grounding
IMPORTANT
In pole-mounted applications, a ground connection must be made
between the switch, transformer, LBC control, and SCADA equipment
for proper protection of the equipment. The pole ground must be sized
per local utility practices to minimize the impedance between the
Switch and the control.
IMPORTANT
All external inputs to the control must be
routed within 8 inches of their corresponding ground.
During a surge, a potential of approximately 1.5 kV per foot can develop
in the conductors. Differences between conductor and ground path
lengths can add additional stress to the control components in the
event of a power surge.
IMPORTANT
Any external voltage sensor installed with the NOVA LBS must have its
ground referenced to the switch ground.
