M D S
C 3 2
Instruction Book
Page 3
Effective: May 2006
I.B. 2C12060H08
For more information visit: www.EatonElectrical.com
1. Only qualified electrical personnel familiar with the
equipment, its operation and the associated hazards
should be permitted to work on the equipment.
Additionally, only qualified personnel should be per-
mitted to install or operate the equipment.
2. Always be certain that the primary and secondary cir-
cuits are de-energized or the circuit breaker is
removed to a safe work location before attempting
any maintenance.
3. For maximum safety, only insert a completely assem-
bled breaker into an energized cell.
4. Always ensure that drawout circuit breakers are in
one of their designed cell positions, such as Connect,
Test, Disconnect or Remove. A circuit breaker per-
mitted to remain in an intermediate position could
result in control circuits being improperly connected
resulting in electrical failures.
1-4 QUALIFIED PERSONNEL
For the purpose of operating and maintaining low volt-
age power circuit breakers, a person should not be con-
sidered qualified if the individual is not thoroughly
trained in the operation of the circuit breaker and how it
interfaces with the assembly in which it is used. In addi-
tion, the individual should have knowledge of the con-
nected loads.
For the purpose of installing and inspecting circuit
breakers and their associated assembly, a qualified per-
son should also be trained with respect to the hazards
inherent to working with electricity and the proper way to
perform such work. The individual should be able to de-
energize, clear and tag circuits in accordance with
established safety practices.
1-5 OTHER PUBLICATIONS AND
DOCUMENTATION
In addition to this instruction manual, other printed infor-
mation and documentation is available and supplied as
appropriate. This additional information can include, but
not necessarily be limited to, an instruction manual for a
specific electronic trip unit, instruction leaflets for acces-
sory items, renewal parts information, necessary dimen-
sional drawings and a Product (application) Guide.
Specific reference documents associated with Magnum
DS, DSX and DSL circuit breakers are listed in a sepa-
rate document entitled
Engineering Data TD01301004E
Figure 1-3 Typical Magnum DS Designation Example
Circuit Breaker
Type
MDS - Standard and
Double Wide Frames
MDN - Narrow Frame
Interrupting
Capacity
4 - 42,000
5 - 50,000
6 - 65,000
8 - 85,000
C - 100,000
E - 150,000
X - 200,000
Frame
Size
08 - 800 Amps
12 - 1200 Amps
16 - 1600 Amps
20 - 2000 Amps
25 - 2500 Amps
30 - 3000 Amps
32 - 3200 Amps
40 - 4000 Amps
50 - 5000 Amps
M D S L
0 8
Figure 1-4 Typical Magnum DSL Designation Example
Circuit Breaker
Type
MDSL- Standard Frame
with Integral Current
Limiters
Interrupting
Capacity
L - 200,000
Frame
Size
08 - 800 Amps
12 - 1200 Amps
16 - 1600 Amps
20 - 2000 Amps
Table 1.2 Magnum DSL Ratings at 600 Volts and Below
Breaker
Designation
Frame Size
Amperes
Max. Interrupting Rating, RMS Sym.
Amp., System Voltage 600 or Below
MDSL08
MDSL12
MDSL16
MDSL20
800
1200
1600
2000
200,000
200,000
200,000
200,000
Figure 1-5 Typical Magnum DSL(MDSL) Drawout
Circuit Breaker with Integral Current Limiters
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