5
NOVA™ STS Single-Tank, Triple-Single, Electronically Controlled Recloser
INSTALLATION AND OPERATION INSTRUCTIONS
MN280046EN May 2016
4.
Ground the reclosers and mounting hanger
. Make
the ground connection to the ground connector in
accordance with approved utility standards. The ground
connector is located on the back of the mechanism
housing. See Figure 4 for ground connector location.
The ground clamp accepts #10 to #2 stranded cables.
See Figures 8 and 9 for recommended grounding for
the NOVA STS recloser.
Ground
Figure 4 . NOVA STS recloser ground and receptacles .
5.
Install the control
. Refer to
Service Information S280-
70-7 Form 6 Triple-Single, Microprocessor-Based Pole
Mount Recloser Control Installation and Operation
Instructions
. Make sure the control cable is connected
between the control and the recloser, the control is
properly programmed for the planned installation, and
the control is grounded.
To ensure proper installation of this cable, securely
fasten the aluminum cable coupler ring (Figure 5).
Figure 5 . Cable with aluminum cable coupler ring .
CAUTION
Equipment damage . Check the heater input power label
located near the receptacle on the recloser to insure
the input power matches the heater rating . Failure
to comply can result in recloser misoperation and
equipment damage .
T354 .0
6.
Connect heater power cable
. The recloser tank
includes either a 120 Vac or 240 Vac heater for humidity
control. Connect the two-wire input cable to the
recloser input receptacle.
7.
Make bypass and disconnect provisions in
accordance with approved utility standards
: the
recloser contacts are open, the bypass switches are
closed, and the disconnected switches are open.
otee:
N
Disconnect switches and bypass switches are
not required, but are highly recommended as
they facilitate switching and isolation. Disconnect
switches for AC sensing and power connections are
necessary to isolate the Form 6-TS control for testing
and servicing.
CAUTION
Equipment damage . Do not adjust or rotate bushing
terminals . The bushing terminals are factory-calibrated
to meet the continuous current requirement of the
switchgear . Adjusting or rotating the bushing terminals
can damage the encapsulated interrupter, resulting in
equipment damage or personal injury .
T270 .0
CAUTION
Equipment damage may occur if torque values are
exceeded .
T370 .0
8.
Make the high-voltage line connections
.
A. Connect high-voltage lines to recloser bushings
terminals. Refer to Figure 6 for terminal identification
of the NOVA STS recloser. 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 20—23 Nm (15—17 ft•lbs); torque
1/2-13 pinch bolts to 39—42 Nm (29—31 ft•lbs).
Recommended torque for bushing terminal to line
connection of 45-50 ft•lbs.
IMPORTANT
The default connections use the horizontal bushing as the
source side and vertical bushing as the load side. Also, the
horizontal bushing may be used as the load side and 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.
If equipped with internal voltage sensors, the horizontal
bushings (1, 3, 5) must be connected to the source. The
internal voltage sensors cannot monitor source-side voltage
when the NOVA STS recloser is in the OPEN position if the
horizontal bushings are connected to the load.
