Panelboards With 2000A Capability
New Air Circuit Breaker Incomers

The versatility of the successful Memshield 2 MPS modular panelboard system is extended still further with the introduction of new air circuit-breaker incomer modules.

This means that specifiers and installers can now choose between the following incoming devices.

The Memshield 2 MPS system was introduced just over a year ago by Eaton MEM Circuit Protection and Control. Modular construction makes it easy to design anything from a simple panelboard with one incoming module and one outgoing module, to a sophisticated switchboard. It allows for a mix of fuse and circuit-breaker technology on the incoming and outgoing sections; the incomer can now be an ACB, FCS or MCCB while outgoing modules can house FCSs, MCCBs or miniature circuit-breakers. A unique software program simplifies the design process. Panels can be supplied as factory-built assemblies or in modular form for assembly on site.

The new air circuit-breakers are 3-pole or 4-pole drawout type units, available in ratings up to 2000A with a fully rated neutral. They include a 1600A unit which is compatible with standard 1 MVA supply transformers.

The ACB has a fast-acting double-break contact action and a 65kA service rated breaking capacity. There is a built-in trip unit supervision circuit. It is one of the smallest ACBs available worldwide and has low temperature dissipation, ensuring cool running. It is easily maintained and offers ready access to the auxiliary and control terminals. A double-insulated body means that accessories can be field-fitted.

The ACB modules are 600mm wide and 475mm deep and are available in Forms of Separation up to Form 4 Type 2. They are designed for top or bottom cable entry with front access for cabling and maintenance. There is a facility to incorporate a supply authority CT compartment and multi-function metering.

Busbars within the ACB module, and throughout the MPS system, have a fault withstand rating up to 50kA for 1 second.

The unique Memshield 2 MPS Advantage software program has been upgraded to include the ACB modules. This program takes the designer through the selection procedure step-by-step to ensure that all the necessary modules and accessories are selected. It provides a sketch of the finished board, prepares a list of parts, and calculates dimensions, weights and prices. The MPS Advantage program enables potential switchboard layouts to be produced in a matter of minutes by MEM sales engineers or their customers, using a standard portable or desk-top PC.

The flexibility of Memshield 2 MPS has made it popular with specifiers and installers. The modular design brings the panelboard concept into application areas which were previously only satisfied by special panelboards or factory-built switchboards. The availability of ACB incomers up to 2000A will enhance this flexibility still further.