Kyle Form 5, Form 5 UDP, Form 5 DC NOVA Recloser Control Installation and Operation Instructions

Grounding with a Remote Supply Voltage Transformer; 4-Wire Multi-Grounded, 3-Wire Ungrounded, or Impedance-Grounded

Installation of a Form 5 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

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.

IMPORTANT: All external inputs to the Form 5 control must be routed within 8 inches of their corresponding ground. During a surge, a potential of approximately 1.5kV per foot can develop in the con- ductors. Differences between conductor and ground path lengths can add additional stress to the control components in the event of a power surge.

 

 

 

Low Voltage Distribution Network

 

Supply Voltage

Form 5 LS Control

Input

Input

 

 

115 Vac

 

 

 

Supply Voltage

 

Terminal

Terminal

 

 

 

 

Form 5 LS Control

 

 

 

Transformer

 

Block

Block

Local Isolation

AC

 

 

 

 

 

 

 

Transformer

 

NEUTRAL

 

 

AC

 

Customer

 

 

 

 

NEUTRAL

 

Supplied

 

 

 

 

 

 

Low Voltage

 

External

 

 

 

 

Low Voltage

 

Ground Lug

 

External

 

Arrester

 

 

 

Ground Lug

 

 

ELECTRICAL CONNECTIONS - Remote dedicated

 

 

 

 

 

 

supply transformer

 

ELECTRICAL CONNECTIONS - using isolation transformer

 

Transformer

 

Surge

Surge

 

 

 

Surge

Arrester

 

 

 

Arrester

 

 

 

Arrester

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Recloser

 

 

 

 

 

 

Head

 

 

 

 

 

 

Ground

 

 

HOT

 

 

 

 

 

 

NEU

 

 

 

 

 

 

GND

Arrester

 

 

 

 

 

 

 

 

 

 

 

 

Ground

 

 

 

 

 

 

 

 

 

Arrester

 

 

 

 

 

 

Ground

System

 

 

 

 

 

 

Neutral

 

Note: Distance between

 

 

Recloser

 

 

transformer and

 

 

 

 

 

recloser should be

Control Cable

 

 

 

one pole span or

 

 

 

 

 

 

 

 

less

 

 

 

 

 

 

 

 

 

Pole

 

 

 

Supply

 

Form 5 LS Control

 

 

Voltage

 

 

 

 

 

 

 

 

Pole

 

 

Input Terminal Block

 

 

Ground

 

 

 

 

 

 

NEU AC

 

 

 

Pole

 

 

 

 

 

 

 

 

 

 

Customer Ground Connection

 

 

 

 

 

at External Lug

 

Figure 30.

Recommended grounding method for the Form 5 Control installed on 4-wire multi-grounded, 3-wire ungrounded, or impedance-grounded systems with remote supply voltage transformer.

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