the power input receptacle on the auxiliary swing panel
inside the control box.
●
●
The control box must be properly grounded.
●
●
For external power, use a 120 VAC source referenced
to ground.
–
The neutral terminal is internally connected to
chassis ground.
–
The power source must be capable of supplying
15 Amps.
●
●
The power input receptacle works with a standard
NEMA 5-15R extension cord set with normal polarity.
Reversed polarity will short the external power supply
to ground.
●
●
After connecting the power cord, select
EXTERNAL
power on both the CL-7 front panel and the auxiliary
swing panel power switches to power on the control.
●
●
For permanent auxiliary power to the CL-7 control and
actuator board (for example, using substation power)
●
●
Contact the factory for a supplemental wiring
schematic.
●
●
Wiring changes will be required on the back panel
to avoid back-feeding the voltage regulator from the
auxiliary power source.
EVER-Tap with motor drive unit ETMD-A CL-7 control settings
●
●
CL-7 firmware version 1 .15 .0 or later
is required on the
CL-7 front panel
●
●
From the CL-7 front panel, use Function Code 49 and
select “Eaton ETMD-A” .
Alternatively, this setting may be
changed using ProView NXG software.
●
●
For normal operation using the CL-7 control in AUTO
or LOCAL mode
, ensure the actuator board control
switch is in the “AUTO” position. This switch is near the
wire harness connector to the actuator board.
●
●
Emergency manual operation of the tap changer
without a working CL-7 front panel can be performed
by moving the actuator board control switch to the
“MANUAL” position. A second toggle switch near the
wire harness of the actuator board is used to manually
trigger the actuator board to command “Raise” and
“Lower” operations.
●
●
The tap changer actuator board can be disabled
by
setting the control switch to the “OFF” position between
“AUTO” and “MANUAL”.
●
●
From the CL-7 front panel, manual and automatic
operation is similar to that of a Quik-Drive operation
.
However, keep these things in mind:
●
●
A complete tap change cycle is approximately 2
seconds under most operating conditions. Cold
temperature, especially with a low voltage supply to
the control/actuator board, may result in longer cycle
times.
●
●
The actuator board is triggered from the first raise or
lower signal that it receives from the CL-7 and locks out
further input until the end of the tap change cycle, so a
brief actuation of the raise/lower switch in “MANUAL”
mode is enough to start and complete a tap change.
●
●
It is acceptable to hold the raise/lower switch in one
position if multiple tap changes are to be made in the
same direction.
●
●
Before reversing the direction of operation of the tap
changer, wait for the completion of a tap change cycle.
●
●
Due to the longer tap change cycle and differences
in the internal mechanism, the user will notice that
the position indicator pointer moves slowly from one
position to the next compared to the rapid motion
generated by a Quik-Drive tap changer.
●
●
If the tap changer fails to operate with the actuator
board in AUTO or MANUAL mode
, check that all wire
harness connections are tight and check the 15A fuse on
the actuator board.
●
●
In the unlikely event that the tap changer fails to
move when commanded and/or stalls between taps
,
wait for approximately 10 seconds while the actuator
board resets and then trigger the tap changer to move
in the opposite direction. If the tap changer fails to move
again as commanded, there is likely a mechanical jam in
the tap changer or motor drive unit. It is also possible that
the voltage supply and/or temperature are too low.
Maintenance
Quik-Drive tap-changers
Step voltage regulators equipped with Quik-Drive tap
changers are designed to provide many years of trouble-
free operation. The usable life of a regulator is affected
by application, but can be extended when periodic
inspections and maintenance are performed. Maintenance
and inspection schedules will vary and can be different
for the same voltage regulator design depending upon
system conditions and loading. The best predictor of future
maintenance requirements is past experience.
If past maintenance requirements are not known, a first
inspection of the Quik-Drive tap-changer contacts and other
mechanical components inside the tank should be carried
out after 10 years or 100,000 operations.
Inspection of components inside the tank and maintenance
of voltage regulator mechanisms should include the items
listed below. Any problems found should be resolved before
placing the units back into service. Consult the tap-changer
manuals listed below or your Eaton representative for
details on maintenance procedures.
23
VR-32 and EVER-Tap™ Voltage Regulator
InstallatIon, operatIon, and MaIntenance InstructIons
MN225008EN June 2020
