9
NOVA
®
15i, NOVA 27i, and NOVA 38i; Three-phase
microprocessor-controlled; installation and operation
instructions (S280-43-1)
Instructional Literature
IL0104001E
Effective January 2017
Remove recloser from service
1. Block ground tripping via the control panel.
2. Close all three bypass switches.
3. Pull down the yellow operating handle with a hotstick. The
yellow operating handle is located under the recloser sleet
hood.
4. The control will sense that the recloser is open and provide
OPEN/LOCKOUT indication on the front panel.
5. Open the source and load disconnect switches.
6. Remove high-voltage connections from recloser.
7. Remove control cables, power cables, and ground leads from
recloser.
Note:
Disconnecting the control cable on an energized
recloser will not damage the integrated CTs.
8. Follow standard utility procedures regarding removal of
recloser from service.
Grounding the NOVA i recloser
3-wire ungrounded and impedance grounded systems
The use of a grounding mat may be required depending upon the
local safety regulations defining the permissible step and touch
potential levels. Consult local regulations for proper grounding
procedures.
In pole-mounted applications, a ground connection must be made between the
recloser, transformer, recloser control, and SCADA equipment for proper
protection of the equipment. It is recommended to use a minimum of 50 sq mm
copper wire for the pole ground connection to the recloser.
IMPORTANT
All external inputs to the control must be routed within 203 mm of their
corresponding ground. During a surge, a potential of approximately 1.5 kV per foot
can develop in the conductors. Differences between conductor and ground path
lengths can add additional stress to the control components in the event of a
power surge.
IMPORTANT
Any external voltage sensor installed with the NOVA i recloser must have its
ground referenced to the recloser ground.
IMPORTANT
Hazardous Voltage. If the recloser is energized while the control cable is
disconnected, the CT secondaries can generate high voltages. Contact
with high voltage can cause severe personal injury or death.
WARNING
