Rolla have always designed and tested enclosures to the latest standards, from BS5486 to BS EN 60439-1 and now BS EN 61439-2 (IEC 61439-2).
ASTA and KEMA Testing has been carried out at various independent test stations including :-
- Falcon (Loughborough),
- BSTS (Now NaREC, Hebburn),
- Socomec (Strasbourg),
- ABB (Bergamo),
- IPH (Berlin),
- BSI Testing (Hemel Hempstead),
- KEMA laboratory (Prague).
Some of our test certificates are listed here
Our simple guide to fault ratings is here
Motor Control Centres (MCC) are used to centralise the distribution of power and control to motors in the process industries. They comprise a sheet steel enclosure, a busbar system for the power and multiple compartments for the different control components. Rolla Ltd generally provide enclosures which are full height (over 2m) and contain an ASTA/KEMA certified Fault Rated Busbar system, are segregated to Form 4 of BS EN 61439-1 and are sealed against personnel access for safety. We also cater for small projects where busbars are not required with our 400mm deep UCC4 system.
Our Busbar systems are rated and certified up to 690V AC as standard but are usually connected to a typical LV network of 400V 3 Phase nominal. Neutrals are normally fully rated. Specialised voltages may also be used on some plants or offshore platforms.
Each MCC will have one or more incoming supply sections which are typically rated from 250A upwards, and multiple starter or drive sections as required for the duty. Other sections to be incorporated may include Power Factor Correction (PFC), SCADA, ICA, Telemetry, PLC, Small Power Distribution, Corner Units, Transformers etc. all as required for the particular project.
Incomer sections, including changeover systems, are usually fitted with free-issue devices including ACB’s, MCCB’s and fuseswitches, connected to the busbar system by Rolla, in accordance with our type tested arrangements.
Starter compartments contain all the protection and control gear for a single motor (Form 4), and can be either fixed pattern or withdrawable. Multi-compartment starters (group starters) are also used where lots of small motors need to be controlled and the Form 4 requirement can be relaxed.
Boards can be supplied with corner units and bridge sections for use where space is restricted - we have ASTA certificates at both 50KA and 80KA for such sections.
Withdrawable units are used to save space and improve maintenance times on critical items of plant. We usually provide the trays pre-punched for the appropriate isolating device so that it lines up with the door handle, and any other punchings as required for the project.
Our withdrawable trays are equipped with 3 phase incoming power connectors at 130A, and either 50A or 130A outgoing connectors for DOL or Star-Delta starters. We also include 10, 20 or 30 auxiliary connectors rated at up to 20A.
Low Voltage Distribution Switchboards (sometimes called "Power Switchboards" or "Main Switchboards") are used as the electrical power distribution points in a building or process plant, normally at 400V to 690V and in current ratings from 100A to 6300A.
Rolla can provide a full range from 100kA at 6300A down to the smallest sub-distribution.
All our products are short circuit and temperature rise tested to the latest standard BS EN 61439-2:2011 (IEC 61439-2:2011).
Our form of supply is the enclosure and integrated, fault rated, busbar system, plus we will fit any free-issue switches as required. All switches fitted by ourselves will be connected to the busbars with solid copper links to ensure the highest possible integrity. Our customers then fit the metering, controls and wiring to form the finished board.
We supply to a wide range of end users and industry applications. See our news page for more examples.
We fit a range of free-issue switches from major manufacturers including Socomec, ABB, Schneider etc.
IP ratings are from IP54 down to IP2X as required. We can also supply Infra-Red monitoring facilities to enable live inspections on a routine basis.
The above suite is fitted with IP42 grilles.
Our products are used in many industries in the UK and worldwide with some examples listed below:-
UK Water companies:-
Yorkshire Water Scottish Water Thames Water Severn Trent Water Welsh Water United Utilities Southern Water South West Water Northumbrian Water Anglian Water Portsmouth Water
UK Infrastructure & renewables:-
National Grid Energy from waste Windfarms Hydro Generation Environment Agency Network Rail London Underground London Olympics British Waterways Hospitals Universities Airports incl. Military Bases
Coca Cola Nestle Kellogs Unilever Wm Grant & Sons
Magnox BNFL Urenco AWE UKAEA
Chemicals & Pharmaceuticals:-
Esso Shell Ineos Gazprom Maersk Croda BASF Akzo Nobel Astra Zeneca Syngenta
Nigeria Benin Cameroon Russia Uganda Taiwan Spain Iceland Canada Ghana Malta Jersey Belgium Algeria Falklands Iraq Kuwait Iran Kazakhstan Bermuda United Arab Emirates Vietnam India Guernsey Indonesia Seychelles