Table of Contents
Advertisement
SECTION 1: INTRODUCTION
1-1 GENERAL INFORMATION
The Magnum DS and DSX Power Circuit Breakers can
be fixed or drawout air circuit breakers utilizing an elec-
tronic tripping system. The Magnum DSL circuit breaker
utilizes the same tripping system, but is available only in
the drawout configuration. MDSL and MDSX versions
have current-limiting characteristics as indicated by the
"Current Limiting" badge on the front covers. All break-
ers are designed for use in both switchboard and metal-
enclosed switchgear assemblies having maximum volt-
ages of 635 volts ac MDS type breakers, 600 volts ac for
MDSL type breakers, and 480 volts ac for MDSX type
breakers. Magnum DS circuit breakers are available in
three physical frame sizes with continuous current rat-
ings from 800 through 6000A. and interrupting capacities
from 42 kA to 200 kA. The three MDS physical frame
sizes have common height and depth dimensions, differ-
ing only in width (Figure 1-1). Magnum DSL circuit break-
ers are available in one frame size with continuous cur-
rent ratings from 800 through 2000A and an interrupting
capacity up to 200,000A (Figure 1-5). Circuit breaker
nameplates provide complete rating information. All
Magnum DS, Magnum DSX, and Magnum DSL circuit
breakers are 100 percent rated, UL listed, and are built
and tested in an ISO 9002 certified facility to applicable
NEMA, ANSI, IEEE and UL standards (Tables 1.1 and
1.2, Figures 1-2, 1-3 and 1-4).
Magnum circuit breakers use a rigid frame housing of
engineered thermoset composite resins which has high
strength structural properties, excellent dielectric char-
Double-wide Fixed MDS
Narrow Frame Fixed MDS
Figure 1-1 Family of Magnum DS (MDS) Low Voltage Power Fixed and Drawout Circuit Breakers (800-5000 Amperes)
I.B. 2C12060H08
acteristics and arc tracking resistance.
MDS, MDSX and MDSL drawout circuit breakers are a
through-the-door design having three breaker positions
with the compartment door closed (CONNECT, TEST,
DISCONNECT) and one position out of its compartment
on extension rails (REMOVE). The operating mecha-
nism is a two-step stored energy mechanism, either
manually or electrically operated.
When withdrawn on captive compartment cassette
extension rails, MDS, MDSX and MDSL circuit breakers
can be inspected, accessory items added, and minor
maintenance performed. The inside of the compartment
can also be inspected with the circuit breaker on its
extension rails.
Please read and understand these instructions
before attempting to unpack, install, operate or
maintain this equipment. Study the breaker and its
mechanism carefully before attempting to operate it
on an energized circuit.
MAGNUM CIRCUIT BREAKERS SHOULD NOT
UNDER ANY CIRCUMSTANCES BE APPLIED OUT-
SIDE THEIR NAMEPLATE RATINGS. OPERATION
OUTSIDE OF THESE RATINGS COULD RESULT IN
DEATH, BODILY INJURY OR PROPERTY DAMAGE.
For more information visit: www.EatonElectrical.com
Instruction Book
Effective: May 2006
NOTICE
!
WARNING
Standard Frame Drawout MDS
Page 1
Hide quick links:
Advertisement
Table of Contents
