2007-12-18
A range of enclosed moulded-case circuit-breakers, in robust steel enclosures,is introduced by Eaton for protection and control of large industrial and commercial loads. Ranging from 63A to 630A in single-pole, three-pole and four-pole variants, it includes units with integral residual current portection.
A new range of enclosed moulded-case circuit-breakers in heavy duty sheet steel enclosures is announced by Eaton. Suitable for protection and control of large industrial and commercial loads, the range extends from 63A to 630A in single-pole, three-pole and four-pole variants. It includes versions with integral residual current protection.
The circuit-breakers are Eaton’s Series G moulded-case circuit-breakers. These are designed for global applications and feature compact size, ease of installation, excellent performance and Kema-Keur certification to the international switchgear standard, IEC 60947‑2. The enclosed versions are type-tested to IEC 60439-1.
Versions with residual current protection are suitable for applications requiring personal protection against electric shock or fire protection. They are also suitable for applications where long cable runs and/or high earth fault impedances demand residual current protection to satisfy the requirements of The Wiring Regulations, BS 7671.
The sensitivity is adjustable from 30mA to 10A. Adjustable time delay, from instantaneous to 1 second, is also offered, providing for discrimination with other residual current devices. The residual current devices also incorporate two alarm contacts as standard, one operating at 50% trip current and the other at 100%. Two LEDs indicate that power is ON and the earth leakage current is more than 50% of full trip current.
The enclosures are fabricated from 1.5mm industrial sheet steel, with a 2mm cover and epoxy polyester finish to resist the most arduous physical conditions. Environmental protection is IP3X. Most enclosures have gland plates and knockouts. Removable neutral links are provided for ease of commissioning.
The new enclosed MCCBs are type-tested by Kema to IEC 60439-1, Low voltage switchgear and controlgear assemblies, Part 1. The four smallest sizes – 63A, 80A, 100A and 125A – have a 25kA short-circuit rating (ICC) and are available in single-pole, three-pole and four-pole options. 160A, 200A and 250A units are available in three-pole and four-pole versions with a 40kA short-circuit rating while the largest, 400A and 630A units are also available in three-pole and four-pole versions with a 50kA short-circuit rating.
“The new enclosed MCCBs extend our existing range of circuit-breakers and MCCB panelboards and underline Eaton’s ability to offer both fuse and circuit-breaker solutions for industrial and commercial applications” says Mike Lawrence, product manager.
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