MN008006EN Manual
Efective March 2021
NOVA LBS Load Break Switch
16
www.eaton.com/cooperpowerseries
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.
