Cooper Kyle Form 5/Triple-Single Installation Instructions Manual page 34

Kyle Form 5/Triple-Single Microprocessor-Based Recloser Control Installation and Operation Instructions
Grounding with a Local Supply Voltage Transformer; 4-Wire Multi-Grounded,
3-Wire Ungrounded, or Impedance-Grounded
Installation of the Form 5/Triple-Single control 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
IMPORTANT: All external inputs to the Form 5 con-
trol must be routed within 8 inches of their correspond-
ing ground. During a surge, a potential of approximately
1.5 kV per foot can develop in the conductors. Differ-
ences between conductor and ground path lengths can
add additional stress to the control components in the
event of a power surge.
Transformer
Surge
Arrester
AC
NEU
GND
Surge
Arrester
Supply
Voltage
NOVA-TS
Triple-Single
Recloser
Pole Ground
Figure 30.
Recommended grounding method for the Form 5/Triple-Single control installed on 4-wire multi-grounded, 3-
wire ungrounded, or impedance-grounded systems with local supply voltage.
34
Typical transformer mounting is
180° to the recloser.
Pole
Surge
Arrester
Recloser
Head
Ground
CLOSED
CLOSED
Junction Box
Control
Cable
4-Wire Multi-Grounded Systems
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.
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.
Surge
Arrester
Arrester
Ground
Recloser
Head
Ground
Pole Mounting
Accessory
Input Terminal
Form 5/Triple-Single
Control
Input Terminal
Block
Customer Ground Connection
At External Lug
Supply Voltage
Form 5 Control
Transformer
AC
NEUTRAL
ELECTRICAL CONNECTIONS
Line to Neutral connected transformer
Supply Voltage
Form 5 Control
Transformer
AC
NEUTRAL
Block
External
Ground Lug
ELECTRICAL CONNECTIONS
Line to Line connected transformer
Input Terminal
Block
External
Ground Lug
Line
to
Line
Voltage