Danger, Installation (continued) – Howard SVR1 Regulator User Manual

Page 6

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Document 2.4.114

SVR-1 Step Voltage Regulator

Copyright © 2012 Howard Industries, Inc.

Document No. 2.4.114

Revision: 03

Issued: March, 2012


INSTAllATION (Continued)


SVR-1 regulators are suitable for mounting on a utility

pole, crossarm platform , or pedestal (optional acces-

sory). Regulators are supplied with either pole-mounting

brackets or station platform base according to the regula-

tor’s capacity rating. Refer to page 4 for handling instruc-


An optional pedestal can be supplied for substation

installations requiring a specific safe clearance below

live terminals.

Pedestals are available from the factory in

4-inch height increments, with heights ranging from 21

inches to 49 inches. Regulators should be elevated to

provide adequate vertical clearance to live high-voltage

parts on the regulator cover.

Regulator control units can be mounted on the regulator

tank or at a remote point, using an optional extended-

length control cable.


Connect the regulator to the high-voltage system using

the following procedure. Refer to the appropriate connec-

tion diagram on page 9 (Figure 5, 6, 7 or 8).

1. Identify the “S”, “L”, and “SL” bushings by referring to

the designations embossed on the regulator cover.

The “SL” bushing should be the first bushing con-

nected. Then connect the “S” bushing to the source

and the “L” bushing to the load. Standard bushing

terminals for the SVR-1 are provided as indicated in

the following table and are suitable for connection

to copper or aluminum conductor. Clamp-type con-

nectors are supplied for nameplate current ratings

through 668 Amps.

150 Amps & below:

#8 to 4/0 clamp connector

151–300 Amps:

#2 to 477 kCM clamp connector

301–668 Amps:

#2 to 800 kCM clamp connector

669–1200 Amps:

1-1/8—12 UNF-2A with 4-hole

spade-9.5 mm (0.375 in) minimum


1201–2000 Amps:

1-1/2—12 UNF-2A with 4-hole

spade-12.7 mm (0.5 in) minimum


2. Ground the regulator using the ground provisions

located at the base of the tank. Keep ground leads

as short and direct as possible.


Cover-mounted terminal block


SVR-1 regulators are designed for outdoor applications.

Regulators with hanger brackets can be mounted on

utility poles of the proper weight-bearing class. Regulators

supplied with substation bases can be pedestal mounted.

In addition, any regulator can be platform mounted. For

pedestal-mounted substation applications, pedestal

height should be determined by the user to raise the

regulator’s cover-mounted high-voltage connections to a

safe elevation according to applicable codes and utility

installation practices.


It is unsafe to service ungrounded or improperly

grounded equipment. Contact or proximity to energized

equipment will cause death or severe personal injury,

and property damage.


When the regulator is energized, extremely dangerous

high voltage is present at the cover-mounted bushing

terminals and at the terminals of the lightning

arresters. Physical contact with or proximity to these

terminals without proper protection will cause death

or serious personal injury, and property damage.

The regulator should be de-energized and properly

grounded before servicing.