Circuit breakers exceed standards
A
Moeller Electric product story
Edited by the Engineeringtalk editorial team
Mar 1, 2002
Available from Moeller are the FAZ and AZ ranges of miniature circuit breakers and the FIP and FIM ranges of residual current circuit breakers (RCCBs).
Available from Moeller are the FAZ and AZ ranges of miniature circuit breakers and the FIP and FIM ranges of residual current circuit breakers (RCCBs).
Designed and manufactured to exceed the full range of national and international safety standards, the circuit breaker portfolio provides extremely reliable protection even in the most demanding of environments, including building site distribution boards, humid manufacturing halls and mines.
The FAZ miniature circuit breaker provides a uniform switching capacity of 10kA across its 0.5 to 63A rating range.
A choice of single-, double-, triple- and four-pole devices are provided, with the single- and three-pole breakers also available with an additional neutral pole.
Rapid disconnection by FAZ and AZ provides effective protection against overloads and short circuits.
Different applications require different tripping characteristics and a variety of device types are available differentiated by the response value of the short-circuit release as laid down by the IEC/EN 60898 standard.
For higher current levels and greater short circuit currents, Moeller has introduced the AZ high capacity miniature circuit breaker.
With ratings up to 125A and suitable for fault current levels up to 25kA, the AZ is also offered in single- to four-pole versions.
FAZ miniature circuit breakers meet the IEC/EN 60898 standard while AZ high- capacity miniature circuit breakers are built to IEC/EN 60947.
FIP and FIM RCCBs are available in two- or four-pole configurations.
FIP RCCBs are designed for operation under extreme conditions, such as high humidity.
This is because in the event of a residual current arising the RCCB's response threshold of 30mA disconnects rapidly, with tripping times under 40ms, avoiding any danger to personnel.
It is able to detect both AC and pulsating DC residual currents which can occur in the vicinity of rectifier systems.
FIP users have the choice of a number of different response thresholds set at 30, 100, 300 and 500mA - the higher rated fault current values being ideal for fire protection.
Rated uninterrupted currents vary from 16 to 125A.
The modules are surge-proof up to 250A.
A special version, FIPS, allows RCCBs to be arranged in time selective progression, thus, only the breaker immediately upstream of the fault location trips out.
However, the breaker further upstream does not trip enabling unaffected parts of the system to continue in operation.
Combining FAZ and the FIM RCCBs offers triple protection, comprising overload, short circuit and residual current monitoring in one compact device.
This combination provides three-way protection and can be disconnected individually giving local protection in the event of a residual current, thus avoiding unnecessary stoppages of unaffected system parts.
The FIM residual current protection module is rated for currents up to 63A and rated residual currents of 30 and 300mA.
A comprehensive range of accessories enables FAZ and FIP to become sophisticated local signalling and control units.
And the modular concept provides flexibility with freedom to upgrade at any time.
These accessories include: shunt and undervoltage releases, remote switching, trip indicating auxiliary contacts and standard auxiliary contacts.
FAZ and FIP are available for simple busbar mounting either in conventional predetermined lengths or as a variable length commoning busbar.
This variable length system enables the user to combine any of the FAZ and FIP breakers, irrespective of side fitted add on modules.
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