9
Installation procedure
INSTALLATION AND OPERATION INSTRUCTIONS
MN280103EN March 2023 www.eaton.com
Figure 8 . Connection diagram shows complete
surge protection and illustrates bypass and
disconnect switches
Figure 9 . Terminal identification of
Type NOVA NX-STS recloser
Refer to
for terminal identification
of the NOVA NX-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 lb); torque 1/2-13 pinch bolts to
39–42 Nm (29–31 ft lb).
7.
Block ground sensing via the control panel.
8.
Close source and load disconnect switches.
9.
Close reclosers via control signal.
10.
Open bypass switches.
11.
Enable ground sensing, if applicable.
Removing recloser from service
WARNING
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.
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.
1.
Block ground tripping via the control panel. Refer
to
Service Information MN280095EN Form 7
Microprocessor Based Pole Mount Recloser Control
Installation and Operation Instructions
.
NOTICE
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.
2.
Close all three bypass switches.
Note:
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 handle is 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.
The control will sense that all three recloser phases
are open.
NOTICE
DISCONNECT SWITCHES FOR AC SENSING AND POWER
CONNECTIONS ARE NECESSARY TO ISOLATE THE CONTROL FOR
TESTING AND SERVICING.
5.
Disconnect the control battery.
6
4
2
5
3
1
Source
Load
