90 / 182
B-1
Installation
recommendations
Masterpact circuit breakers have been tested for
operation in industrial atmospheres. It is
recommended that the equipment be cooled or heated
to the proper operating temperature and kept free of
excessive vibration and dust.
DB402051
Ambient temperature
Masterpact devices can operate under the following temperature conditions:
the electrical and mechanical characteristics are stipulated for an ambient
b
b
temperature of -5 °C to +70 °C
circuit-breaker closing is guaranteed down to -35 °C.
b
b
Storage conditions are as follows:
-40 to +85 °C for a Masterpact device without its control unit
b
b
-25 °C to +85 °C for the control unit.
b
b
DB402052
Extreme atmospheric conditions
Masterpact devices have successfully passed the tests defined by the following
standards for extreme atmospheric conditions:
IEC 60068-2-1: dry cold at -55 °C
b
b
IEC 60068-2-2: dry heat at +85 °C
b
b
IEC 60068-2-30: damp heat (temperature +55 °C, relative humidity 95 %)
b
b
IEC 60068-2-52 level 2: salt mist.
b
b
Masterpact devices can operate in the industrial environments defined by standard
IEC 60947 (pollution degree up to 4).
It is nonetheless advised to check that the devices are installed in suitably cooled
switchboards without excessive dust.
DB128163
Vibrations
Masterpact devices have successfully passed testing in compliance with
IEC 60068-2-6 for the following vibration levels:
2 to 13.2 Hz: amplitude +/- 1 mm
b
b
13.2 to 100 Hz: constant acceleration 0.7 g.
b
b
Vibration testing to these levels is required by merchant marine inspection
organisations (Veritas, Lloyd’s, etc).
Some applications have vibration profiles outside of this standard and require
special attention during application design, installation, and use. Excessive vibration
may cause unexpected tripping, damage to connections or to other mechanical
parts. Please refer to the Masterpact maintenance guide (causes of accelerated
ageing / operating conditions / vibrations) for additional information.
Examples of applications with high vibration profiles could include:
wind turbines
b
b
power frequency converters that are installed in the same switchboard or close
b
b
proximity to the Masterpact circuit breaker
emergency generators
b
b
high vibration marine applications such as thrusters, anchor positioning systems,
b
b
etc.
Operating conditions
version: 8.3
207E3300.indd