Eaton NOVA LBS 15 User manual

NOVA LBS Load Break Switch
Installation and Operation Instructions
Automatic Switches
Manual
MN008006EN
COOPER POWER
SERIES
Efective March 2021
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CONTENT
SAFETY FOR LIFE............................................................3
SAFETY INFORMATION..................................................3
PRODUCT INFORMATION..............................................4
Introduction...........................................................4
Additional Information..........................................4
Acceptance and Initial Inspection .........................4
Handling and Storage ............................................4
Standards...............................................................4
Quality Standards ..................................................4
Description of Operation.......................................4
Check NOVA LBS Ratings Prior To
Installation.............................................................5
DIMENSIONS .................................................................6
NOVA LBS MECHANISM INTERFACE OPTIONS..............7
Control-Powered Interface....................................7
INSTALLATION PROCEDURE ..........................................9
Moving the Switch.................................................9
Lifting the Switch...................................................9
Remove NOVA LBS from Service .........................11
NOVA LBS Load Break Switch Grounding............11
3-Wire Ungrounded and Impedance
Grounded Systems ..............................................12
Grounding on a 3-Wire Uni-Grounded
System .................................................................13
OPERATION .................................................................14
Electrical Operation.............................................14
Manual Closing/Loading......................................14
Closing .................................................................14
Opening ...............................................................14
OPEN/CLOSE Contact Position Indicator.............14
Hotstick Operation (Manual Open,
Electrical Close.....................................................14
VOLTAGE SENSING OPTION ........................................15
Installation...........................................................15
Operation ............................................................16
LBC control settings.............................................16
ACCESSORIES...............................................................17
Terminals............................................................. 17
Pole-Mounting Hanger........................................ 18
Arrester-Mounting Brackets ............................... 19
SERVICE INFORMATION .............................................. 20
Service Requirements .........................................20
Frequency of Inspection...................................... 20
Testing Operation ...............................................20
High-Potential Withstand Testing.......................20
Test 1................................................................... 21
Test 2................................................................... 21
Test 3................................................................... 21
Withstand Test Results .......................................21
Module Flashover Service ...................................21
TROUBLESHOOTING....................................................22
Unit Will Not Close.............................................. 22
Unit Will Not Open Electrically............................22
Undesired Closing ...............................................22
Undesired Opening ............................................. 22
ANNEX A – PIN RELATION FROM THE CONTROL CABLE23
ANNEX B – WIRING DIAGRAM ....................................24

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SAFETY FOR LIFE
Eaton products meet or exceed all applicable industry standards relating to product safety. We actively promote safe practices in the use and
maintenance of our products through our service literature, instructional training programs, and the continuous efforts of all Cooper Power Systems
employees involved in product design, manufacture, marketing, and service.
SAFETY INFORMATION
The instructions in this manual are not intended as a
substitute for proper training or adequate experience in
the safe operation of the equipment described. Only competent
technicians who are familiar with this equipment
should install, operate, and service it.
A competent technician has these qualifications:
•Is thoroughly familiar with these instructions.
•Is trained in industry-accepted high- and low-voltage
safe operating practices and procedures.
•Is trained and authorized to energize, de-energize,
clear, and ground power distribution equipment.
•EIs trained in the care and use of protective equipment
such as flash clothing, safety glasses, face shield, hard
hat, rubber gloves, hotstick, etc.
Following is important safety information. For safe installation and
operation of this equipment, be sure to read and understand all cautions
and warnings.
HAZARD STATEMENT DEFINITIONS
This manual may contain four types of hazard statement:
DANGER
Indicates an imminently hazardous situation which, if not avoided, will
result in death or serious injury.
ADVERTISEMENT
Indicates a potentially hazardous situation which, if not avoided, could
result in death or serious injury.
CAUTION
Indicates a potentially hazardous situation which, if not avoided, may
result in minor or moderate injury.
WARNING
Indicates a potentially hazardous situation which, if not avoided, may
result in equipment damage only.
Following are general caution and warning statements that apply to this
equipment. Additional statements, related to specific tasks and
procedures, are located throughout the manual.
DANGER
Hazardous voltage. Contact with hazardous voltage will cause death or
severe personal injury. Follow all locally approved safety procedures when
working around highand low-voltage lines and equipment.
ADVERTISEMENT
Before installing, operating, maintaining, or testing this equipment,
carefully read and understand the contents of this manual. Improper
operation, handling, or maintenance can result in death, severe personal
injury, and equipment damage.
ADVERTISEMENT
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 may result in death, severe personal
injury, and equipment damage.
ADVERTISEMENT
Power distribution and transmission equipment must be properly selected
for the intended application. It must be installed and serviced by
competent personnel who have been trained and understand proper
safety procedures. These instructions are written for such personnel and
are not a substitute for adequate training and experience in safety
procedures. Failure to properly select, install, or maintain power
distribution and transmission equipment can result in death, severe
personal injury, and equipment damage.

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PRODUCT INFORMATION
Introduction
The MN008006EN manual provides installation, operation, and service
instructions for the NOVA LBS Load Break Switch. Before installing and
operating this switch, carefully read and understand the contents of
this manual.
Read This Manual First
Read and understand the contents of this manual and follow all locally
approved procedures and safety practices before installing or
operating this equipment. The NOVA LBS switch is used with the LBC
(Load Break Control) control.
Additional Information
These instructions cannot cover all details or variations in the
equipment, procedures, or process described nor provide directions
for meeting every possible contingency during installation, operation,
or maintenance. For additional information, contact your Eaton
representative.
Acceptance and Initial Inspection
Each NOVA LBS is completely assembled, tested, and inspected at the
factory. It is in good condition when accepted by the carrier for
shipment. Upon receipt, inspect the shipping container for signs of
damage. Unpack the switch and inspect it thoroughly for damage
incurred during shipment. If damage is discovered, file a claim with the
carrier immediately.
Handling and Storage
Be careful during handling and storage of the switch to minimize the
possibility of damage. Refer to the Moving the Switch and Lifting the
Switch sections. If the switch is to be stored for any length of time prior
to installation, provide a clean, dry storage area.
Eaton recommends transporting NOVA LBS switches in the closed
position to maximize the operational performance of the unit.
Standards
The NOVA LBS Load Break Switches are designed and tested in
accordance with:
IEC 62271-1 - High-voltage switchgear and control gear - Part 1:
Common specifications for alternating current switchgear and control
gear
IEC 62271-103 - High-voltage switchgear and control gear - Part 103:
Switches for rated voltages above 1 kV up to and including 52 kV
Quality Standards
ISO 9001 Certified Quality Management System
Description of Operation
The NOVA LBS Load Break Switch is a three phase vacuum switch
designed for distribution electrical systems is a three-phase, vacuum
interrupting switch designed for electrical distribution systems through
15/27 kV.
The NOVA LBS is designed and tested to be compatible with the LBC control
Eaton type. The NOVA LBS has an alimentation interface by the control.
The solid polymer insulation system does not rely on a gaseous, liquid, or foam
dielectric. The NOVA LBS is highly resistant to ozone, oxygen, moisture,
contamination, and ultraviolet light. The NOVA LBS has three solid-polymer
interrupter modules, a current transformer encapsulated by interrupt module
and a standard aluminum (or stainless steel if requested) enclosure for the
mechanism with protection rating IP54 or IP67. It is suitable for operation in the
temperature range of -40°C to +60°C
to +55°C.

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RATINGS AND SPECIFICATIONS
Check NOVA LBS Ratings Prior To Installation
The NOVA LBS must be applied within its specified ratings. Check data
plate ratings and compare with the system
characteristics at the point of application prior to installation.
The Tables 1, 2, and 3 list the ratings and specifications for the NOVA LBS Load
Break Switch. The NOVA LBS has an electrical durability class E3 (highest rating)
according to IEC 62271-103. The NOVA LBS switch can perform up to 10,000
operations at rating load.
TABLE 1: Voltage Ratings
Description
NOVA LBS 15
NOVA LBS 27
Maximum Voltage (kV) 15.0 27.0
Rated Basic Impulse Level (kV) 110 125
Power Frequency Withstand
Dry, one minute 60 60
Wet,one minute 50 50
TABLE 2: Current Ratings
Description
NOVA LBS 15
NOVA LBS 27
Rated Current(A) 630 630
Load Break Switching Capability (A) 630 630
Symmetrical peak withstand current (kA)
16 (3 sec) 16 (3 sec)
Peak asymmetrical withstand current (kA)
41.6 41.6
Line charging current (A)
2 2
Cable charging current (A)
20 20
TABLE 3: Mecanical Especification
Description
NOVA LBS 15
NOVA LBS 27
Minimum number of Mechanical/Electrical Operations without
Maintenance (Close-Open)
10.000 10.000
Mechanical durability class according to IEC 62271-103
M2 M2
Mass (Weight) - kg (lbs)
105 (231)* 105 (231)*
*Estimated average weight of the NOVA LBS Load Break Switch (varies depending on accessories).
The average weight of the NOVA LBS Load Break Switch with LBS control is 130 kg

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DIMENSIONS
Figure 1. NOVA LBS Dimensions.
TABLE 4 - Terminal
Terminal Options
A
Eyebolt
, 1/0 500 MCM
Cable range (630 A maximum) 78 mm (3.1 in)
Eyebolt, 6/0 500 MCM
Cable range (630 A maximum) 78 mm (3.1 in)
Eyebolt, 2/0 600 MCM
Cable range (630 A maximum) 78 mm (3.1 in)
Eyebolt, 4/0 1000 MCM
Cable range (800 A maximum) 106 mm (4.2 in)
Flat Pad, 2 holes
(630 A maximum) 117 mm (4.6 in)
Flat Pad, 4 holes
(800 A maximum) 121 mm (4.7 in)
TABLE 5 - Dimensions
Model
B
C
NOVA LBS 15 850 mm (33,5 in) 590 mm (23,3 in)
NOVA LBS 27 850 mm (33,5 in) 590 mm (23,3 in)
TABLE 6 - Creepage Distances
Description
NOVA LBS 15
NOVA LBS 27
Terminal to terminal 1080 mm (42.5 in) 1080 mm (42.5 in)
Lower terminal to ground/earth 860 mm (33.8 in) 860 mm (33.8 in)

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NOVA LBS MECHANISM INTERFACE OPTIONS
Control-Powered Interface
The NOVA LBS Load Break Switch has a power through control interface
and is fully operational with Eaton's LBC control equipped with a
switched power supply required to drive the mechanism, interface
circuitry and a fully shielded 19-pin cable. The power interface through
the control includes a 19-pin receptacle on the LBS Load Break Switch
and internal heaters (for humidity control), powered through the control
on 24V DC.
The LBC control can be powered from 85 to 265 VAC via an auxiliary
power supply (commonly a TP power supply). The power supply board
located in the control converts the input voltage to 24 Vdc for driving
the opening coil and powering the opening and closing spring-loading
motor.
A DC-DC converter converts the control voltage from 24V DC to 12V DC
to power the communication devices.
Figure 3. Configuration of the NOVA LBS switch with power supply
through the control with input power supply from a potential
transformer.
The power supply board also houses the voltage monitoring and
conditioning circuits that protect the battery from faults and provide
tripping/closing operations without AC power. In the absence of AC
power to the electronic control, the control battery will provide
tripping/closing operations. The NOVA LBS Load Break Switch and the
control system are capable of exceeding one thousand operations on
battery power alone.
In the absence of voltage to power the electronic control and the
absence of power from the control batteries, the NOVA LBS Load Break
Switch can be opened manually by using the opening lever. The NOVA
LBS Load Break Switch can also be closed by means of the closing lever,
which needs to be operated 7 times to charge the spring and close the
NOVA LBS switch.
4-pin CA power supply cable
19-pin control
cable..
Potencial
transformer(optional
)

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Figure 4. NOVA LBS Load Break Switch mechanism (bottom view with cover removed).
Figure 5. NOVA LBS Load Break Switch mechanism housing without bushings installed.
Figure 6. NOVA LBS Load Break Switch, nameplate and manual opening and closing handle.
Opening Coil
Closing
spring
Opening
spring
Lifting
eyebolts
Main Grounding
Terminal
19-pin
Receptacle
Vent Valve
Mounting
Base
Circuit Setting
Board
Open/Close position
indicator
Opening
handle
Mecanism
Closing handle
Spring-charging
motor
Contact Position
Indicator
19-pin
Receptacle
Auxiliary
Contacts
Mechanism
Housing
Nameplate
Opening handle
Closing handle

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INSTALLATION PROCEDURE
ADVERTISEMENT
This equipment is not intended to protect human life. Follow all local
safety procedures and practices while installing or operating this
equipment. Failure to comply could result in death, severe personal
injury, and equipment damage.
ADVERTISEMENT
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.
CAUTION
Personal injury. Epoxy encapsulated bushing have sharp edges. Wear
protective gloves when handling the unit. Failure to do so may cause
cuts and abrasions.
When installing the switch, refer to the applicable frame mounting
instructions. Installation instructions are included with the mounting
frame.
1. Check the Data Plate Ratings. Make sure that the ratings,
settings, and interface options on the Load Break Switch
nameplate (see Figure 06) are correct for the planned
installation.
2. Perform High-potential Withstand Tests. Before installing the
NOVA LBS switch, perform withstand voltage tests. Refer to
the Service Information section for withstand voltage test
procedures.
3. Install the Switch Under Load. Install the Switch on Cooper
Power Systems frames suitable for pole mounting. Refer to
Figure 7 for moving and lifting instructions.
•Before installing the switch, open the switch
using the green handle.
ADVERTISEMENT
Follow all locally approved safety procedures when lifting and mounting
the equipment. Use the lifting lugs provided. Lift the unit gently and do
not allow it to shift. Incorrect lifting may cause damage to the
equipment.
Moving the Switch
NOVA LBS switches are transported on pallets (bolted onto them).
When moved by forklift truck, the switch must remain bolted to the
pallet to prevent damage to the OPEN/CLOSED position indicator. Eaton
recommends carrying NOVA LBS switches in the closed position to
maximize the operating performance of the unit.
CAUTION
Risk of tipping over. High center of gravity. Use a 4-point lash to prevent
the unit from tipping over during lifting operations. Incorrect lifting may
cause personal injury or damage to the equipment.
Lifting the Switch
Follow all approved safety procedures and practices when securing and
lifting the equipment. Lift the unit smoothly and do not allow it to shift.
Figure 7. Moving and lifting the NOVA LBS Load Break Switch
A: Tie height for units: 914 mm (36 in)
B: The center of gravity (Cg) is approximately 100 mm (4 in) below the
plane of the lower terminals.
ADVERTISEMENT
Equipment damage can occur if torque values are exceeded.
1. Ground the NOVA LBS Load Break Switch. Ground the
grounding connector. The ground connector is located at the
back of the mechanism housing. Improper grounding can
cause equipment damage and malfunction.
•See Figure 5 for the location of the grounding
connector.
•See Figures 11, 12, and 13 for the recommended
ground connection for the NOVA LBS Load Break
Switch.
2. Install the Controller. Refer to the control installation manual
and install the control. Make sure that the control cable is
connected between the control and the Load Break Switch,
that the control is correctly programmed for the planned
installation, and that the control is grounded.
To ensure proper installation of this cable, securely fasten the aluminum
cable coupler ring (Figure 7).
Figure 8. Cable with aluminum cable coupler ring.

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3. Make High-voltage Line Connections (refer to Figures 9 and
10).
•The disconnect switches and by-pass are not necessary
but are highly recommended because this facilitates
switching and isolation.
CAUTION
Equipment Damage. Do not adjust or rotate bushing terminals without
first removing power line leads and loosening pinch bolt to release
clamp tension. Failure to remove tension between the clamp and the
interrupter stud prior to rotating the terminal will damage the
encapsulated interrupter assembly resulting in equipment damage.
CAUTION
Equipment damage may occur if torque values are exceeded.
1. Connect high-voltage lines to switch bushing terminals
The recommended torque value for bushing terminal-to-line
connection is 45-50 ft-lbs. This is applicable to soft-drawn and
hard-drawn copper as well as applicable wire sizes, solid wire, and
stranded wire.
NOTICE: Equipment damage may occur when:
•Line tension is not removed prior to making or
disconnecting wires to the switch terminals
•If the recommended torque is exceeded.
Refer to Figure 10 for terminal identification of the NOVA LBS.
Terminal connection to copper conductors only are recommended.
To rotate a flat-pad or eyebolt bushing terminal prior to connecting
power line leads, loosen the pinch bolt on the terminals.
After rotating the terminal, retighten the pinch bolt as follows:
torque 3/8-16 pinch bolts to 15-17 ft-lbs;
torque 1/2-13 pinch bolts to 29-31 ft-lbs.
IMPORTANT
8
The default connections use the horizontal bushing as the source side
and the vertical bushing as the load side. Also, the horizontal bushing
may be used as the load side and the vertical bushing as the source side.
Note that reversing the source and load bushings has no effect on
overcurrent protection but may require setting or wiring changes to the
control for correct metering.
The horizontal bushings (1, 3, 5) must be connected to the source.
1. Provide surge protection. Surge protection must be
provided on both sides; see Figure 9.
Figure 9. Connection diagram shows complete surge protection
and illustrates bypass and disconnect switches.
Figure 10. Terminal identification of NOVA LBS Load Break Switch.

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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.

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3-Wire Ungrounded and Impedance Grounded Systems
The use of a grounding mat may be required depending upon the local
safety regulations defining the permissible step and touch potential
levels. Consult local regulations for proper grounding procedures.
Grounding with a Local Supply Voltage Transformer: 4-Wire
Multi-Grounded, 3-Wire Ungrounded, or Impedance- Grounded
Installation with a local supply voltage transformer must
include the following (refer to Figure 11):
• Protection of the switch bushings and the supplying
transformer with lightning arresters.
• Grounding of the switch head and tank.
• Grounding of the transformer tank.
• Grounding of the control cabinet.
• Grounding of the SCADA equipment.
Figure 11. Recommended grounding method for NOVA LBS switches
with LBC control and local power potential transformer.
Grounding with a Remote Supply Voltage Transformer: 4-Wire
Multi-Grounded, 3-Wire Ungrounded, or Impedance- Grounded
Installation with a remote supply voltage transformer must include the
following (refer to Figure 12):
• Protection of the switch bushings and the supplying
transformer with lightning arresters.
• Grounding of the switch head and tank.
• Grounding of the transformer tank.
• Grounding of the control cabinet.
• Grounding of the SCADA equipment.
Figure 12. Recommended grounding method for NOVA LBS switches
with LBC control and remote power potential transformer.

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Grounding on a 3-Wire Uni-Grounded System
Installation on a 3-wire uni-grounded system must include
the following (refer to Figure 13):
• Protection of the switch bushings and the supplying
transformer with lightning arresters.
• Grounding of the switch head and tank.
• Grounding of the transformer tank.
• Grounding of the control cabinet.
• Grounding of the SCADA equipment.
ADVERTISEMENT
Hazardous Voltage. Use locally approved operator safety procedures for
proper insulation when maintaining this equipment. High voltage step
and touch potential is characteristic in uni-ground systems. Failure to
comply can cause death or severe personal injury.
CAUTION
Exported Potential. Do not make direct electrical connections to remote
devices. All SCADA equipment must be mounted locally or connected
using the fiber-optic or radio communication accessory. Direct
connections to remote devices can produce exported potential causing
equipment damage or personal injury
CAUTION
Hazardous Voltage. Do not use a shared low-voltage network to power
the switch control unless the network is specifically designed to
withstand maximum ground potential rise. Ground faults on a
highvoltage network can create a rise in ground potential
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. An improper ground
connection can cause equipment damage and malfunction. 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.
Figure 13. Recommended grounding method for LBS switches with LBC control and 3-wire system with single ground.

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OPERATION
ADVERTISEMENT
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.
ADVERTISEMENT
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
ADVERTISEMENT
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
ADVERTISEMENT
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

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VOLTAGE SENSING OPTION
Installation
ADVERTISEMENT
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.
ADVERTISEMENT
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.
ADVERTISEMENT
Hazardous voltage. Solidly ground all equipment. Failure to comply can
result in death, severe personal injury, and equipment damage.
IMPORTANT
Disconnect switches for AC control power are necessary to isolate the
control for testing and servicing.
ADVERTISEMENT
Hazardous voltage. If terminal connections are reversed, the internal
voltage sensing option may indicate zero voltage with the contacts
open. Do not rely on internal voltage sensing to ensure that the voltage
is zero and the line has been de-energized. Always follow proper safety
practices and use a separate detection method to verify a de-energized
condition. Failure to do so can result in contact with high voltage, which
will cause death or severe personal injury.
CAUTION
Equipment damage may occur if torque values are exceeded.
The Internal voltage sensing uses a capacitive voltage divider to provide
a low voltage input to the NOVA LBS switch control.
Refer to the Installation section of this manual for the installation
procedure for the NOVA LBS.
See manual MN008007 for more information on installing the LBC Pole
Mount control. Make the internal voltage sensing option connections
when installing the control as indicated in these Service Information
manuals.
Verify correct grounding of the NOVA switch and control prior to
making any high-voltage connections and before high-potential testing.
A proper ground connection consists of a good electrical ground
connection to the surge ground connector located on the mechanism
housing. Provide a good electrical ground connection to the control
cabinet ground.
Note: Painted surfaces of the mechanism housing may prevent a ground
connection to the switch housing. Always provide a good electrical
connection to the mechanism surge ground connector. Poor grounding
of the mechanism housing may result in the presence of high voltage on
the mechanism housing associated with the high-voltage resistor or
capacitor connections used with internal voltage sensing.
To ensure proper installation of this cable, securely fasten the aluminum
cable coupler ring.
Figure 15. Receptacle for NOVA LBS cable.
CAUTION
Dangerous voltage. Do not touch the voltage measurement/control
cable receptacle connections. If the NOVA LBS Load Break Switch is
energized and the voltage measurement/control cable is disconnected
from the Load Break Switch or control, a voltage will be present at the
receptacle. Contact with this voltage can cause personal injury.
The NOVA LBS switch has a 19-pin male receptacle (Figure 15) that
connects to the control via a shielded 19-pines cable. The control has a
19-pin female receptacle and its corresponding circuitry; see Figure 16.
The LBC control has a 4-pin male receptacle (Figure 16) that connects to
the Potential Transformer via a shielded 4-conductor cable.
Figure 16. Connections of the LBS Control
Grounding
conector
19-pin receptacle
for 19-pin cable.
Cable glands for
connecting
external control /
antenna cables
Receptacle for
power supply
cable

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CAUTION
Equipment misoperation. Verify all connector pins and both mating
interface surfaces are clean and dry before connecting cables. Voltage
sensing errors can result from contamination. Failure to comply can
result in control and switch misoperation.
The electrical connectors of the switch, control, and cable must be clean
and dry. Contaminated surfaces may be cleaned with denatured alcohol
and wet connector surfaces may be dried with a heat gun. Dry surfaces
are particularly important for the internal voltage sensor cable
connections. The accuracy of the sensors can be influenced by moisture
contamination.
CAUTION
Equipment misoperation. Do not connect this control to an energized
switch until all control settings have been properly programmed and
verified. Refer to the programming information for this control. Failure
to comply can result in control and switch misoperation, equipment
damage, and personal injury.
Connect control cables, power cables, and sensor cables to the control.
Verify that the proper cable/receptacle connections are made. Improper
cable connections can result in damage to the switch and/or control.
Complete the control programming before making the high-voltage line
connections. Refer to the Operation section of this manual. Verify the
correct voltage rating of the equipment. Verify the correct control
programming for ratio and phase angle correction for the voltage rating
of the equipment.
Make appropriate electrical connections to the terminals of the switch.
Verify the correct load-side (vertical bushings) and source-side
(horizontal bushings) terminal connections. This is required for correct
operation of the internal voltage sensor. Energize switch and confirm
the voltage outputs in the control.
When the switch is energized, the output signal from the voltage
sensors sent to the control is 20 to 40 V (depending on the primary
voltage).
Operation
TABLE 7 - Phase angle adjustment / Voltage sensor ratio adjustment
Sensor Switch Cable lenght
Voltage sensor
ratio adjustment
Phase shift
Capacitive NOVA LBS 15 / 27
3 m
6 m
9 m
12 m
15 m
727:1
731:1
732:1
735:1
740:1
-2°
-2°
-2°
-2°
-2°
LBC control settings
The LBC control must be programmed with the TP ratio and phase angle
setting as per TABLE 7. These are inserted in the System Setup screen
(Figure 17).
See Manual MN008008 for more information about programming the
LBC control.

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Figure 17. System Configuration Screen of the LBS control.
ACCESSORIES
Terminals
The standard terminal is an eyebolt, 1/0—500 mcm (630A). Eyebolt,
4/0—1000 mcm (800 A), 2-hole and 4-hole flat- pad terminals, and stud-
type terminals are available as an accessory (Table 4).
The eyebolt, flat-pad, and stud terminals are made of copper alloys.
Eaton recommends terminal connection to copper wires to optimize the
electrical connection. Aluminum cables may produce aluminum oxide
sufficient to compromise the electrical connections.
Anti-oxide coatings for temporary protection of wirebrushed, aluminum
cable connections to flat-pad or stud terminals must be maintained at
intervals determined by the customer based on load current, climate,
and other installation conditions.
Eyebolt terminals are recommended for copper conductors only.

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Pole-Mounting Hanger
A pole-mounting hanger (Figure 18), which bolts directly to the switch
frame, is available for pole-mounting installation.
Note: All dimensions are mm (inches). Dimensions shown are
approximate.
Figure 18. Dimensions of NOVA LBS switch with pole-mounting hanger and arrester-mounting bracket accessories.
Pole

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Arrester-Mounting Brackets
The arrester-mounting bracket accessory (Figure 23) can be bolted to
the switch frame and pole-mounting hanger for the addition of inboard
and outboard arresters. The arresters are not included with the
brackets.
Note: All dimensions are mm (inches). Dimensions shown are
approximate.
Figure 19. Dimensions of NOVA LBS switch with pole-mounting hanger and arrester-mounting bracket accessories.
Pole

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SERVICE INFORMATION
Service Requirements
The NOVA LBS switch is designed for a minimum mechanical life of
10,000 operations, which is class M2 according to IEC-62271-103. The
NOVA LBS switch should be inspected every 10 years for physical
damage and correct operation.
Frequency of Inspection
Because these switches are applied under widely varying operating and
climatic conditions, service intervals are best determined by the user
based on actual operating experience. However, solid-insulated,
vacuum-interrupting switches should be inspected every ten years.
Testing Operation
This switch is used with Eaton microprocessor-based NOVA LBS control.
Refer to the control operation manual.
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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.
1. Check the data plate ratings. Make sure the ratings, settings,
and interface options on the switch data plate (Figure 6) are
correct for the planned testing.
2. Test electrical open and close operation. Close and open the
switch contacts using the microprocessor control. Confirm that
the contacts have closed and opened by:
A. The OPEN/CLOSE contact position indicator, or
B. By a continuity check between the switch terminals.
3. Test manual open. Pull the yellow manual open handle (Figure
14) down to open the switch contacts. Confirm that the contacts
have opened by:
A. The OPEN/CLOSE contact position indicator, or
B. By a continuity check between the switch terminals.
4. To close the NOVA LBS contacts
A. First push up the GREEN manual opening handle;
B. Close the NOVA LBS switch using the LBC control. To
perform Manual Closing, pull down the closing lever 7
times.
High-Potential Withstand Testing
The following equipment is required for this test:
High-voltage test set – Must be capable of supplying suitable voltages
for determining the dielectric withstand capability of the switch.
Sensitive circuit breakers should be included to prevent damage in the
event of a flashover.
Note: Test results for NOVA switches equipped with the internal
voltage sensing option will be influenced by the source-to-
ground connected sensing resistor, especially if DC high-
potential testing is performed.
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Hazardous voltage. The switchgear (apparatus and control) and high-
voltage transformer must be in a test cage or similar protected area to
prevent accidental contact with the high-voltage parts.
CAUTION
Radiation. At voltages up to the specified test voltages, the radiation
emitted by the vacuum interrupter is negligible. However, above these
voltages, radiation injurious to personnel can be emitted. See Service
Information S280-90-1, Vacuum Interrupter Withstand Test Voltage
Ratings Information for further information.
Use the following procedures to perform high-potential withstand tests
at 75% of the rated low-frequency withstand voltage for 60 seconds.
Refer to Table 8 for test voltages and Figure 25 for test connection
diagrams.
Test results for NOVA switches equipped with the internal voltage
sensing option will be influenced by the source-to ground connected
sensing resistor.
TABLE 8 – NOVA LBS withstand test voltage ratings information
75% of Rated Low-Frequency Withstand Voltage
(1-minute dry) (kV rms)
Model
CA
NOVA LBS 15 37,5
NOVA LBS 27 45,0
1. Approximately 0.53 mA additional leakage current per phase with internal voltage
sensors.
2. Approximately 0.32 mA additional leakage current per phase with internal voltage
sensors.