Grounding with a Local Supply Voltage
Transformer: 4-Wire Multi-Grounded,
3-Wire Ungrounded, or Impedance-
Grounded
Installation with a local supply voltage transformer must
include the following (refer to Figure 11):
• Protection of the recloser bushings and the supplying
transformer with lightning arresters.
• Grounding of the recloser head and tank.
• Grounding of the transformer tank.
• Grounding of the control cabinet.
• Grounding of the SCADA equipment.
Grounding with a Remote Supply Voltage
Transformer: 4-Wire Multi-Grounded,
3-Wire Ungrounded, or Impedance-
Grounded
Installation with a remote supply voltage transformer must
include the following (refer to Figure 12):
• Protection of the recloser bushings and the supplying
transformer with lightning arresters.
• Grounding of the recloser head and tank.
• Grounding of the transformer tank.
• Grounding of the control cabinet.
• Grounding of the SCADA equipment.
Type NOVA Three-Phase, Microprocessor-Controlled Recloser Installation and Operation Instructions
12
GROUND TIE
POLE
SURGE
ARRESTER
SUPPLY VOLTAGE
(12 GAUGE MINIMUM)
ARRESTER
GROUND
SURGE
ARRESTER
KYLE
CONTROL
POLE
AC
NEU
GRD
NEU
AC
INPUT TERMINAL
BLOCK
CONTROL CABLE(S)
ARRESTER
GROUND
CUSTOMER GROUND CONNECTION
AT EXTERNAL LUG
SURGE
ARRESTER
NOVA
RECLOSER
RECLOSER
GROUND
CONNECTOR
TRANSFORMER
POLE GROUND
(6 GAUGE MINIMUM)
NOTE: Distance between
transformer and recloser
should be one pole span
or less.
Figure 12.
Recommended grounding method for NOVA reclos-
ers with Cooper microprocessor-based control and
remote supply voltage transformer.
TRANSFORMER
SURGE
ARRESTER
POLE
SUPPLY VOLTAGE
(14 GAUGE MINIMUM)
POLE GROUND
(6 GAUGE MINIMUM)
KYLE
CONTROL
CUSTOMER GROUND CONNECTION
AT EXTERNAL LUG
NEU
AC
GND
NEU
AC
INPUT
TERMINAL
BLOCK
CONTROL
CABLE(S)
RECLOSER
GROUND
CONNECTOR
NOVA
RECLOSER
ARRESTER
GROUND
SURGE
ARRESTER
ARRESTER
GROUND
SURGE
ARRESTER
Figure 11.
Recommended grounding method for NOVA recloser
with Cooper microprocessor-based control and local
supply voltage transformer.
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