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MN008006EN Manual
Efective March 2021
NOVA LBS Load Break Switch
10
www.eaton.com/cooperpowerseries
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.