Eaton MVS User Manual

2
Instructional Booklet IB02102006E
Effective May 2011
Type MVS (previously WLI)
metal-enclosed switchgear—
4.76 kV, 15.0 kV, 27.0 kV, and 38.0 kV
EATON CORPORATION www.eaton.com
Introduction
Read and understand these instructions before attempting
any installation, operation, or maintenance of this switchgear.
Purpose
This instruction book is expressly intended to cover the installation,
operation, and maintenance of type Medium Voltage Switch
(MVS), previously known as the Westinghouse Load Interrupter
(WLI) metal-enclosed switchgear. It does not purport to cover
all possible contingencies, variations, and details that may arise
during installation, operation, or maintenance of this equipment.
If further information is desired by the purchaser regarding this
particular installation or application information, contact the local
Eaton sales office, see Eaton’s Consulting Application Guide, and
review the appropriate industry standards.
Basic description and application
A type MVS (previously WLI) metal-enclosed switchgear assembly
vertical section consists of an air insulated, three-pole, gang-
operated, quick-make, quick-break, load interrupter switch in
a floor-mounted metal enclosure. It can be applied in combination
with power fuses and many other protective devices to provide
safe, economical switching and circuit protection where
infrequent disconnecting means is required.
Switchgear identification
A nameplate is located inside the small access door of each type
MVS switchgear vertical section (see Figure 1). Contained on this
nameplate are the Eaton master parts list number and all the
necessary switchgear ratings. This information should be given
to the Eaton sales office if a question should arise concerning
the switchgear or if renewal parts are required. This information
is sufficient for Eaton to find the manufacturing information
for the switchgear.
The switch rating nameplate is on the switch mechanism cover.
This nameplate is readily visible when the main enclosure door
is opened. This nameplate contains all of the switch’s ratings and
style number.
Figure 1. Typical Nameplate
1A33788H01
symmetrical amperes; volts maximum.
ratings when fuses are mounted in this vertical section.
See separate label inside for fuse continuous current
capable of delivering not more than RMS
This switchgear vertical section is suitable for use on a circuit
of industry standards IEEE C37.20.3 and ANSI C37.57
Type Switchgear Assemblies meet the requirements
Short Time (2 Sec., Sym)
Momentary RMS Asym
Continuous:
Maximum Continuous
Master P.L.:
GO & It:
Section No. Of
Date:
3 Phase 60 Hz.
kV BIL:Operating Volts:
Mfd. At:
Encl. Category:
Enclosure Type:
Type:
Instructions
Medium Voltage Metal Enclosed Switchgear Assembly
Main Cross Bus Current Ratings

Eaton MVS Specifications

General

Brand	Eaton
Model	MVS
Category	Power distribution unit
Language	English