M-6200A Application Guide
–12–
Multi-Step Voltage Reduction
CAUTIIO:
▲
Voltage applied through dry contacts to actuate Voltage Reduction
Steps 1, 2, and 3
must
be +12 Vdc obtained from terminal TB1-4 of
the M-6200A Regulator Control.
The M-6200A uses terminals TB1-2 and TB1-7 together to provide up to three levels of
voltage reduction. The external connections to achieve these steps are shown in
Table 1
and
Figure 3
. Voltage reduction amounts are set in the M-6200A Regulator Control software.
Removal of the Cooper Control
WAROIOG:
8
In no case should the line current circuit be interrupted with
the regulator or transformer energized. Do not remove auxiliary
current transformers without shorting the current inputs. Death
or severe electrical shock can occur.
1. Verify that the regulator control wiring is in a safe condition that will allow removal
of the Cooper Regulator Control from the control cabinet.
• The control wiring is de-energized and isolated from any potential safety
hazards.
• All local Safety Tagging rules have been applied as necessary.
2. Open the cabinet door of Cooper control.
3. Loosen the thumb screws on the control panel (
Figure 6
), and swing the panel
outward.
WAROIOG:
8
In no case should the line current circuit be interrupted with
the regulator or transformer energized. Do not remove auxiliary
current transformers without shorting the current inputs. Death
or severe electrical shock can occur.
4. De-energize the control by opening the VT disconnect switch and placing the
CT switch in the shorting position. Ensure that the CT in the regulator has been
properly shorted.
5. Loosen the screws on the spreader bar terminal block at the bottom of the cabinet,
then pull down on the spreader bar to disconnect it.
OITE:
Q
The two hinge pins
must be saved
from the original control.
6. Remove and save the two hinge pins, then lift the panel off of the hinges and
remove it from the cabinet.