Eaton KA146W5 User Manual

240 Vac applications to an Eaton's Cooper Power series 120 V control
Option 1:
The control box assembly/panel is connected to earth
ground to provide protection to operations personnel. This is
a typical field application where the control is mounted on
a grounded regulator tank or dropped down a pole with the
control box grounded properly.
Since the control is configured for 120 Vac, a 2:1 isolation
transformer must be used to step and isolate the supply
voltage. This isolation transformer must isolate both the
neutral and line on the secondary side. Also, the neutral
and ground on the secondary side should not be bonded
or connected. To check isolation from earth ground, check
the continuity of each lead on the isolation transformer with
respect to ground (G). Check this before connecting the
leads to the control panel. See Figure4.
The control panel assembly is grounded through the tank
or a separate grounding strap. Earth ground of the isolation
transformer is not connected to the control. The only source
of earth ground reference on secondary of the isolation
transformer is through the control box connection to
ground.
Option 2:
The control box assembly is floating. This is a typical shop
or lab application when the control is mounted on an
ungrounded regulator tank or setting on a workbench.
Since the control is configured for 120 Vac, a 2:1 isolation
transformer must be used to step and isolate the supply
voltage. This isolation transformer must isolate both the
neutral and line on the secondary side. Also, the neutral
and ground on the secondary side should not be bonded
or connected. To check isolation from earth ground, check
the continuity of each lead on the isolation transformer with
respect to ground (G). Check this before connecting the
leads to the control panel. See Figure5.
In this case the ground of the isolation transformer is
connected to the green terminal post on the CL-7 control.
In this configuration, the only source of earth ground
reference on the secondary side of the isolation transformer
is through the control box connection to the isolation
transformer ground.
6
INSTALLATION, OPERATION, AND MAINTENANCE INSTRUCTIONS MN225003EN April 2018
CL-7 Voltage Regulator Control

Eaton KA146W5 Specifications

General

Brand	Eaton
Model	KA146W5
Category	Cables and connectors
Language	English