Weidmüller unveils FieldPower decentralised maintenance switch

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Weidmüller is enhancing its FieldPower family of products by adding a decentralised maintenance switch with On/Off function and integrated power distribution. The maintenance switch is based on the PowerBox and is sealed to IP65. Individual machines and plant components as well as motor feeders and drive sub-circuits can be isolated from the power supply by utilising the maintenance switch PowerBox On/Off - allowing maintenance and service work to be performed safely.

Creating an additional T-output to distribute power is also straightforward thanks to the Push-In connection of the contact block. The PowerBox On/Off means users no longer require a separate maintenance switch or separate junction box, which reduces wiring and project planning costs. Installation is simple and fast using pre-fabricated plug-in connectors. The switch is designed to accommodate up to three padlocks to protect as many as three service technicians or teams against the power supply being unintentionally turned on. In addition, it is possible for a PLC to scan the position of the switch via a floating auxiliary contact at the M12 connection of the PowerBox On/Off.

The construction of the PowerBox On/Off has been thoroughly thought through; for instance, it is possible to assemble and mount the upper and lower parts of the maintenance switch in different locations at the same time. The lower part with integrated contact block can be installed on site in accordance with technical specifications. At the same time the upper part can be assembled and terminated in the workshop. Both parts can then be snapped together on site without any errors and screwed tight. This approach considerably reduces on-site mounting times and costs.

To protect loads, outgoing feeder circuits and branch lines, the PowerBox Fuse uses 1/4inch x 1.25inch fuses. The corresponding fuse ratings and specifications are contained in DIN VDE 0100 Part 430. A red LED provides visual indication when a fuse is blown. Conductor cross-sections from 0.5-4mm2 can be connected to the fuse plugs.

FieldPower range

Weidmüller's FieldPower family benefits form a new connection concept that facilitates decentralised power distribution for systems spread across wide areas. The 'flexible busbar' is economical for mechanical and plant engineering, in airports, motor car production and anywhere where power has to be distributed over longer distances. In addition to pluggable connectors, cables, pre-assembled and terminated cable harnesses, tools and an extensive range of accessories, the FieldPower family of products includes T-junction boxes with protection to IP65, maintenance switches and junction boxes – optionally available with fuse function.

Uncut round or flat cables can be used to distribute power. Power is tapped from the five-core power cable anywhere close to the consumer via the PowerBox, which is equipped with IDC (insulation displacement connection) rapid termination technology. Hard-wired or pluggable options for branch lines and outgoing feeders to starters and frequency converters are possible. That reduces the length of cable to be laid and, in so doing, also reduces mounting times. All told, FieldPower can lower project costs and increase flexibility when extending plant, making changes to current projects or when plant layout needs to be altered at a later date.

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