1. Application
molded case circuit breakers have the functions of long overload delay reverse time limit, short delay reverse time limit, short circuit delay fixed time limit, short circuit instantaneous and under-voltage protection. The protection characteristics of circuit breaker are complete and accurate. It can improve the reliability of power supply and avoid unnecessary blackouts. Only 1, 3, 5 power lines, 2, 4, 6 load lines are allowed.
Features
·Compact structure
·Electric ratings: AC 400V ,50Hz/60Hz
·Up to 800A current rating
·Mounting mode: Vertical and horizontal
·Compliant standard: IEC/EN60947-2.
·High interruption, short arc (partial zero arc) and anti-vibration.
2. Selection
3. Technical data
|
Frame size current(Inm)A |
125 |
250 |
400 |
800 |
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|
Model |
CQM3E-125 |
CQM3E-250 |
CQM3E-400 |
CQM3E-800 |
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|
Poles |
3 |
4 |
3 |
4 |
3 |
4 |
3 |
4 |
|
|
Rated current In(A) |
32(12.5～32) 63(25～63) 100(40～100) |
250(100～250) |
400(160～400) |
800(315～800) |
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|
Insulation voltage Ui(V) |
AC800 |
AC800 |
AC800 |
AC800A |
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|
Rated impulse withstand voltage Uimp(V) |
8000 |
8000 |
8000 |
8000 |
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|
Rated operating voltage Ue(V) 50Hz/60Hz |
AC400 |
AC400 |
AC400 |
AC400 |
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|
Arcing distance(mm) |
≯50(0)² |
≯50(0)² |
≯100(0)² |
≯100(0)² |
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|
Rated breaking capacity Icu(kA) |
L:50 |
M:70 |
L:50 |
M:70 |
L:65 |
M:100 |
100 |
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|
Rated service short circuit breaking capacity Ics(KA) |
L:35 |
M:50 |
L:35 |
M:50 |
L:42 |
M:65 |
65 |
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|
Rated short time withstand current Icw(kA)/1s |
- |
5/0.4 |
5/1 |
10/1 |
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|
Utilization class |
A |
B |
B |
B |
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|
Electrical life(cycles) |
8000 |
8000 |
7500 |
7500 |
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|
Mechanical life |
Without maintenance |
20000 |
20000 |
10000 |
10000 |
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|
With maintenance |
40000 |
40000 |
20000 |
20000 |
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|
Overall dimensions (mm) |
Width |
92 |
122 |
107 |
142 |
150 |
198 |
210 |
280 |
|
Length |
150 |
165 |
257 |
280 |
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|
Height |
92 |
90 |
106.5 |
115.5 |
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Note:1. According to the IEC60947-1 term "life" denotes the probability of the number of operating cycles that an electrical appliance completes before repairing or replacing components.
2.Zero flying arc cover with height of 4mm (CQM3-63L/M,), 6.2mm CQM3-100L/M, 7.5mm (CQM3-250L/M), 9.3mm (CQM3-400L/M, CQM3-630L/M) and 9.5mm (CQM3-800L/M) is selected to realize zero flying arc.
4. Overall and mounting dimensions (mm)
|
Model |
Poles |
Overall dimensions |
Mounting dimensions |
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|
A |
B |
C |
D |
a |
b |
φd |
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|
CQM3E-125 |
3 |
92 |
150 |
110 |
92 |
30 |
129 |
4.5 |
|
4 |
122 |
60 |
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|
CQM3E-250 |
3 |
107 |
165 |
110 |
90 |
35 |
126 |
4.5 |
|
4 |
142 |
70 |
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|
CQM3E-400 |
3 |
150 |
257 |
146.5 |
106.5 |
44 |
194 |
7 |
|
4 |
198 |
94 |
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|
CQM3E-800 |
3 |
210 |
280 |
155 |
115.5 |
70 |
243 |
7 |
|
4 |
280 |
140 |
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