Operational check
Pre-installation check
The CL-6 control has the facilities for either manual or auto-
matic operation of the tap-changer, using either the internal
source of power (the regulator) or an external source. To
perform an operational check of the control before installing
the regulator, follow these steps.
Note: For use with a non-Eaton voltage regulator, refer to
the manufacturer’s manual for equipment specific
information.
1. Open V1 (and V6, if present) knife switch(es) located on
back panel of control enclosure.
2. Place POWER switch in Off position and CONTROL
FUNCTION switch in Off position.
3. Connect a variable 120 Vac 50/60 Hz source to
EXTERNAL SOURCE terminals. Controls wired for an
external source of 220 –240 Vac have a decal specifying
“240” at the terminals. Verify proper polarity.
4. Place POWER switch in External position.
5. Move CONTROL FUNCTION switch to Manual, press
and hold Raise/Lower momentary toggle switch. Allow
tap-changer to operate to 8 L, the 5% buck position.
Verify tap position indication (TPI) is registering properly
by pressing *Tap Position key.
6. Raise and hold the Raise/Lower momentary toggle
switch. Allow tap-changer to operate to 8 R, the 5%
boost position.
7. Place CONTROL FUNCTION switch in the Auto/
Remote position.
8. Increase variable voltage source until applied voltage
is out-of-band. Note that the Out-of-Band High LED
on the front panel will come on. After the time delay
period, control will issue a lower-tap-change signal.
Verify tap position indication (TPI) is registering properly
by pressing *Tap Position key and comparing the
reading to the tap position indicator on the regulator
junction box.
9. Decrease variable voltage source until applied voltage
is out-of-band. Note that the Out-of-Band Low LED
on the front panel will come on. After the time delay
period, control will issue a raise-tap-change signal. Verify
tap position indication (TPI) is registering properly by
pressing *Tap Position key and comparing the reading
to the tap position indicator on the regulator junction
box.
10. Place CONTROL FUNCTION switch in Manual position
and manually return tap-changer to neutral. When on
neutral, the Neutral Light will illuminate continuously
and position indicator will point to zero.
11. Place CONTROL FUNCTION switch in Off position.
12. Press down on DRAG HAND Reset momentary toggle
switch and release; the position indicator drag hands
will reset to indicating hand.
13. Turn POWER switch to Off and disconnect power
supply from EXTERNAL SOURCE terminals.
In-service check
With the control programmed for basic operation, perform
an operational check of manual and automatic operation.
1. Press the *Comp Voltage key to display compensated
voltage and both band edges in the LCD.
2. Place CONTROL FUNCTION switch in Manual
position.
3. Toggle the Raise/Lower switch up to activate a raise
operation. Allow tap-changer to operate for enough
steps to take voltage out-of-band. Note that the Out-
of-Band High LED on the front panel will come on.
4. Place CONTROL FUNCTION switch in the Auto/
Remote position. After the time delay period, the
control should cause the regulator to step down to the
top band edge. This will display in the LCD.
EXAMPLE: 120 V and a 2 V bandwidth = 121 V top band
edge.
5. After voltage is brought in-band and tap changing has
stopped, move CONTROL FUNCTION switch to the
MANUAL position.
6. Toggle the Raise/Lower switch down to activate a
lower operation. Allow tap-changer to operate for
enough steps to take voltage out-of-band. Note that the
Out-of-Band Low LED on the front panel will come on.
7. Place CONTROL FUNCTION switch in the Auto/
Remote position. After the time delay period, the
control should cause the regulator to step up to the
lower band edge. This will display in the LCD.
EXAMPLE: 120 V and a 2 V bandwidth = 119 V lower
band edge.
Control bench testing
When applying external voltage to a CL-6 control, discon-
nected from the control enclosure, follow these steps:
1. Place a jumper between positions 7 and 8 of the
disconnect plug on the wiring harness of the control.
2. Place a jumper between positions 5 and 6 of the
disconnect plug on the wiring harness of the control.
3. Connect the external source to the external source post
on the front of the control. Connect the hot lead to the
black terminal post, the neutral to the white post, and
the ground to the green terminal post. See the detailed
instructions for applying power to the external source
terminals in Section 1 of this manual.
14
CL-6 SERIES CONTROL INSTALLATION, OPERATION, AND MAINTENANCE INSTRUCTIONS MN225016EN January 2016
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