Howard Voltage Regulators - Manual

Copyright © 2011 Howard Industries, Inc.
1
Document No. 2.4.132
Revision: 0
Issued: October, 2011
Howard Industries, Inc.
Laurel, MS 39440
www.howardtransformers.com
INTRODUCTION
Howard Industries’ SVR-1 single-phase
step voltage regulators are tap-changing
autotransformers designed to automati-
cally regulate distribution line voltages in
a range of plus or minus 10% in thirty-two
steps of approximately 5/8% each. The
following ratings are available:
• Voltage: 2500 Volts (60 kV BIL)
through 19920 Volts (150 kV BIL)
• Current: 50 through 1665 Amps
• KVA: 38.1 through 1000
• Frequency: 50 or 60 Hertz
Internal potential winding taps and/or
an external ratio correction transformer
are provided on all ratings so that each
regulator may be applied within a range
of system voltages.
A digital control system automatically
operates the tap changer mechanism to
maintain system voltage within desired
limits. The control system is externally
programmable to allow precise setting of
control limits and provides sophisticated
capabilities for special control require-
ments, communication, and data logging.
Overhead type voltage regulators are
supplied with support brackets for pole
mounting and have bolt-down provisions
for pad-mounted applications. Substation
type voltage regulators are provided with
rectangular substation bases. Elevating
platforms are available as an option.
SVR-1 voltage regulators are designed for
reliable operation and ease of mainte-
nance and are supplied with a full array of
standard features for routine applications.
Optional accessories are available to ac-
commodate special applications.
Voltage Regulators
28-10
Catalog Section
Howard Industries, Inc.
ISO-9001 Certified Single-Phase Step
Distribution Transformer Division
FIGURE 1: SVR-1 single-phase voltage regulator