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Technical Data
Effective: May 1998
Page
3
TD.44A.01.T.E
Cutler-Hammer
Magnum DS
Metal-Enclosed
Low-Voltage Switchgear
Table R1 – Voltage Ratings (AC)
System Voltage
Maximum Voltage
208/240
480
600
254
508
635
Table R4 – Ratings of Magnum DS Breakers
Breaker
Type
Frame
Amperes
Ratings, RMS Symmetrical Amperes (000)
Interrupting Rating
Short Time Rating
➀
208-240V
480V
600V
208-240V
480V
600V
MDS-408
MDS-608
MDS-808
MDS-C08
MDS-616
MDS-816
MDS-C16
MDS-620
MDS-820
MDS-C20
MDS-632
MDS-832
MDS-C32
MDS-840
MDS-C40
MDS-850
MDS-C50
800
800
800
800
1600
1600
1600
2000
2000
2000
3200
3200
3200
4000
4000
4000
5000
42
65
85
100
65
85
100
65
85
100
65
85
100
130
130
130
130
42
65
85
100
65
85
100
65
85
100
65
85
100
85
100
85
100
42
65
85
100
65
85
100
65
85
100
65
85
100
85
100
85
100
42
65
85
85
65
85
85
65
85
85
65
85
85
85
100
85
100
42
65
85
85
65
85
85
65
85
85
65
85
85
85
100
85
100
42
65
85
85
65
85
85
65
85
85
65
85
85
85
100
85
100
Table R2 – Available Bus Ratings
Cross
Bus
Ampacity
Vertical
Bus
Ampacity
Bus Bracing
2000
3200
4000
5000
6000
2000
3200
4000
5000
—
100kA, 150kA, 200kA
Note:
In addition to the available bus
bracings shown above, the bus has
been tested for short circuit values of
85,000 amperes for a full 60 cycles.
Table R3 – Standards
Magnum DS switchgear conforms to the
following standards: NEMA SG3 and SG5,
CSA, ANSI C37.20.1, C37.51, and
UL Standard 1558.
Maximum voltages at which the inter-
rupting ratings in Table R4 apply are:
These interrupting ratings are based
on the standard duty cycle consisting
of an opening operation, a 15-second
interval and a close-open operation, in
succession, with delayed tripping in
case of short-delay devices.
The standard duty cycle for short-time
ratings consists of maintaining the
rated current for two periods of 1/2 sec-
ond each, with a 15-second interval of
zero current between the two periods.
System Voltage
Maximum Voltage
208 or 240
480
600
254
508
635
Table R5 – Magnum DS Breaker Control Voltages and Currents
Control Voltage
24 DC
48 DC
125 DC
120 AC
240 AC
Close current (SR), ampere
Shunt trip current, ampere
Spring charge motor ampere
2.70
2.70
8.00
1.30
1.30
4.00
0.67
0.67
3.00
0.59
0.59
3.00
0.34
0.34
3.00
Control voltage range:
Close –
Trip –
18-26
18-26
38-56
28-56
100-140
70-140
104-127
60-127
208-254
208-254
Motor currents are running currents. Inrush is approximately 400%. Motor running time to
charge spring approximately 5 seconds.
➀
Also ratings without instantaneous trip.
Ratings
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