6
NOVA™ STS Single-Tank, Triple-Single, Electronically Controlled Recloser
INSTALLATION AND OPERATION INSTRUCTIONS
MN280046EN May 2016
WARNING
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 .
T365 .0
6
2
4
3
1
5
Figure 6 . Terminal Identification of the NOVA STS
recloser .
B. Provide surge arrester protection. Surge arrester
protection should be provided on both sides; refer to
Figure 7.
Surge
Arresters
Bypass
Switch
Disconnect
Switch
Surge
Arresters
Disconnect
Switch
Recloser
1
3
5
2
4
6
Figure 7 . Connection diagram shows complete surge
protection and illustrates bypass and disconnect
switches .
9. Block ground sensing via the control panel.
10. Close source and load disconnect switches.
11. Close all three phases via control signal.
12. Open bypass switches.
13. Enable ground sensing, if applicable.
Remove recloser from service
WARNING
H
azardous 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 .
G108 .1
WARNING
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 .
G114 .1
1. Block ground tripping via the control panel. Refer to
Service Information S280-70-7 Form 6 Triple-Single,
Microprocessor-Based Pole Mount Recloser Control
Installation and Operation Instructions
.
CAUTION
Equipment misoperation . Disconnect all control
power sources prior to disconnecting or reconnecting
the control cable from the control . Failure to comply
can result in recloser misoperation at the time of
disconnection or reconnection of the control cable to
the control .
T311 .1
2. Close all three bypass switches.
otee:
N
If only one bypass switch is closed and the recloser
is opened via the yellow operating handle, it is
possible all three phases will trip based upon mode
selection.
3. Open the source and load disconnect switches.
4. Pull down all three yellow operating handles with a
hotstick. The yellow operating handles are located
under the recloser sleet hood.
●
●
If the recloser is set in single-phase trip/single-phase
lockout mode, only one phase will open.
●
●
If the recloser is set in single-phase trip/three-phase
lockout mode or three-phase trip/three-phase lockout
mode, all three phases will open.
5. The control will sense that all three recloser phases are
open.
