Datasheet

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C-28 Low Voltage Switch & Control Gear
Altitude
(above sea level) - h
Rated operational voltage
U
e
Current correction factor
I
u
h ≤2,000 m 690 V 1 x I
n
2,000< h ≤3,000 m 550 V 0.96 x I
n
3,000< h ≤4,000 m 480 V 0.93 x I
n
4,000< h ≤5,000 m 420 V 0.90 x I
n
Altitude - Correction Factor
The MPW motor protective circuit breakers do not undergo
any change to their specifed performance when applied at
an altitude of up to 2,000 meters above sea level.
However, as the altitude increases, the atmospheric
properties vary in terms of dielectric rigidness and pressure.
Therefore, current and voltage correction factors must be
applied for altitudes exceeding 2,000 meters, as shown in the
following table:
Technical Data
Notes: 1) 500 V with plastic enclosure;
2) Reduce current for temperatures exceeding +60 °C (87% to 70 °C);
3) Only available with spring terminal.
Models MPW12 MPW18 MPW12i MPW18i
Maximum rated current In
max
(Ie) 12 A 18 A 12 A 18 A
Number of poles 3
Short-circuit release 13 x Ie
max
Rated operational voltage U
e
690 V
1)
Rated frequency 50/60 Hz
Rated insulation voltage U
i
690 V
Rated impulse withstand voltage Uimp 6 kV
Use category
IEC 60947-2 (circuit breaker) A
IEC 60947-4-1 (motor starter) AC-3
Tripping test Yes
Overload protection Yes No
Phase failure sensitivity (IEC 60947-4-1) Yes No
Tripping indication No
Tripping class (IEC 60947-4-1) 10 -
Maximum operation per hour Operations/hour 15
Altitude (m) 2,000
Degree of protection (IEC 60529) IP20
Mechanical life Number of operations 100,000
Electrical life Number of operations 100,000
Permissible ambient temperature
Transport and storage -50...+80 °C
Operation
2)
-20...+70 °C
Temperature compensation (IEC 60947-4-1) -20...+60 °C -
Power dissipation per circuit breaker
Maximum rated currents In
≤4 A 7 W
≤10 A 8 W
≤12 A
3)
10 W - 10 W -
≤16 A - 14 W - 14 W
≤18 A - 12 W - 12 W
Resistance to impact (IEC 60068-2-27) 15 g
Standards
IEC 60947-1 Yes
IEC 60947-2 Yes
IEC 60947-4-1 Yes
Connection
Type of terminal Spring
Screws
Phillips (Nº 2)
Spring
Screws
Phillips (Nº 2)
Tightening torque
N.m - 1.2...1.7 - 1.2...1.7
lb.in - 11...16 - 11...16
Dimensions
Width (mm) 45
Height (mm) 100 90 100 90
Depth (mm) 77