Contents
General . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1
Safety . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2
Receiving, Installation and Maintenance . . . . . . . 1-1
Control Basics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-1
Control Function Codes . . . . . . . . . . . . . . . . . . . . . 3-1
Control Advanced Features . . . . . . . . . . . . . . . . . . 4-1
Tap Changer. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-1
Troubleshooting Guide . . . . . . . . . . . . . . . . . . . . . . 6-1
Accessories . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7-1
Spare Parts. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8-1
Index . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9-1
General
McGraw-Edison
®
VR-32 voltage regulators are
regulating auto-transformers. They regulate rated
voltage from 10% raise (boost) to 10% lower (buck) in 32
approximately
5
/
8
percent steps.
McGraw-Edison regulators are supplied with the
following standard features:
• Dual-rated 55/65°C rise
• ADD-AMP™ capability
• Unit construction
• Sealed-tank construction
• Pressure relief device
• 17” minimum creep bushings with clamp-type
connectors
• MOV-type external series arrester
• Shunt arrester mounting bosses
• Two laser-etched nameplates
• Oil sight gauge
• Upper filter press connection
• Drain valve and oil-sampling device
• CE mark compliant control
• Control cable quick disconnect
The 65°C rise insulation system and the sealed-tank
construction allow for a bonus capacity 12% above the
55°C nominal rating without loss of normal insulation
life. The bonus capacity is stated on the nameplate
(such as 167/187 kVA for a nominal 167 kVA regulator).
All McGraw-Edison regulators are manufactured and
tested to ANSI standard C57.15.
Unit construction, which suspends the internal assembly
from the cover, allows for ease of inspection and
maintenance.
There are three types of step-voltage regulators: source-
side series winding (Type B), load-side series winding
(Type A), and series transformer. McGraw-Edison
regulators are usually equipped with an equalizer
winding. The nameplates located on the tank and control
box define the power circuit.
Voltage Regulators
McGraw-Edison
®
VR-32 Regulator and CL-5 Series
Control Installation, Operation and Maintenance
Instructions and Parts Replacement Information
S225-10-10
October 2001 • Supersedes 12/00 • © 2001 Cooper Power Systems, Inc.
Printed in U.S.A.
These instructions do not claim to cover all details or variations in the equipment, procedure, or process described, nor to provide directions for
meeting every possible contingency during installation, operation or maintenance. When additional information is desired to satisfy a problem not
covered sufficiently for the user’s purpose, please contact your Cooper Power Systems representative.
Figure 1.
VR-32 Voltage Regulator with CL-5 Series Control
Service Information
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