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Close call for fast MCC01 January 2006Close Engineering turned to Rittal when one of its customers needed quick delivery of a Motor Control CentreClose Engineering Services, based in Tadcaster, has 56 years experience in the electricity supply business making it fully conversant with the demanding and stringent requirements of this type of industry. Its engineering capabilities and workshop facilities also make them suitable for numerous other industrial electrical projects.
Having recently been notified that a new Rittal TS 8 Motor Control Centre (MCC) system had just been launched, when one of its customers approached them for a MCC, Close Engineering decided to contact the enclosure company.
The MCC was required for use in the electrical supply industry to enable the distribution of substation supplies from 100 Amps to 250 Amps. The specification called for a Form 4b, type 7, 3-phase, neutral and earth system. The fault rating was 31.5 kA for 1 second and the ingress protection rating was IP54. Cable entry was to be from the bottom with cable access from the front, and the system had to be easily extendable in the future.
Already familiar with Rittal’s TS 8 range of enclosures, Close Engineering knew it would be readily available ex-stock, which was a crucial factor as its customer had specified that the delivery was of paramount importance. Also, owing to standard TS 8 frames, the MCC could easily be extended.
With Motor Control Centres it is critical that incoming cables are brought into large cable chambers. The Rittal MCC has a 400mm wide chamber that allows plenty of manoeuvrability for the contractor on site. The adjustable mounting plates allow rapid location owing to the innovative sliding rail system. A choice of compartment height size ranging from 200mm to 2000mm means that the MCC, as with the TS 8, is a truly
flexible solution. To assist Close Engineering, Rittal mounted the fuse switches in the compartments prior to delivery.
The MCC was delivered into the customer fully bayed together with the copper busbar system already installed. All MCCB’s were mounted into the compartments and handles installed on the doors. The only work required by the customer was to wire up the MCCB’s.
A further consideration was for Rittal to manufacture and connect the copper bar from the ‘dead side’ and the incoming side of the main protective device, which proved to be cost effective as well as reducing timescales. The busbar systems are manufactured from harddrawn copper and the MCC offers safe operation under fault conditions of up to 50kA for one second. Contact Details and Archive...Related Articles...Most Viewed Articles... |
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