Installation of a Form 6 pole-mount recloser control with a
remote supply voltage transformer must include the
following:
• 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.
Form 6 Microprocessor-Based Pole-mount Recloser Control Installation and Operation Instructions
20
Surge
Arrester
Recloser
Head
Ground
Supply
Voltage
Pole
Ground
Pole
Recloser
Pole
Surge
Arrester
Transformer
Arrester
Ground
Form 6 Control
HOT
NEU
GND
NEU
AC
Input Terminal Block
Control Cable
Surge
Arrester
Arrester
Ground
Customer Ground Connection
at External Lug
AC
NEUTRAL
Form 6 Control
Supply Voltage
Transformer
ELECTRICAL CONNECTIONS - Remote dedicated supply
transformer
Input
Terminal
Block
External
Ground Lug
Note: Distance between
transformer and
recloser should be
one pole span or
less
System
Neutral
Figure 12.
Recommended grounding method for the Form 6 recloser control installed on 4-wire multi-grounded with remote
supply voltage transformer.
Grounding with a Remote Supply Voltage Transformer; 4-Wire Multi-Grounded
IMPORTANT: All external inputs to the Form 6 recloser
control must be routed within 8 inches 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: 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. The pole ground
must be sized per local utility practices to minimize the
impedance between the recloser and the control.
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