Industrial Metering Panels

The ‘BNO CT Chamber’

The Ritherdon CT Chamber was originally design and tested for UK Power Networks who manage the electricity supply network in the southeast of England. Thousands of units are now in use and are still installed by the DNO (Direct Network Operator) for the Southeast.  However, with the creation of the Building Network Operator (e.g. a landlord responsible for the supply network within a multiple occupancy building) this high quality CT Chamber can be used in any BNO site in the UK.

In a BNO-managed building, the responsibility of the DNO now ends just on the usage side of the cut out (intake position) and, as long as the Wiring Regs are followed, the choice of electrical equipment beyond this point is the BNO’s.

From £715

  • Designed for 100A to 600A supplies (70 kVA to 430 kVA). Permits flexible installation (e.g. can accommodate supply from top or bottom)
  • Accepted by all meter operators
  • Proven track record on the UKPN network. Ideal for BNO use

Over the years, we have manufactured these enclosures for all the major regional electricity companies (RECs or DNOs) in the UK.  These include CT Chambers for UK Power Networks, Mod units for Electricity Northwest, HV COP 3 and LV COP 5s for Scottish Power and Western Power Distribution.

We manufacture metering panels from metal and plastic and have a well-established supply chain for whichever components are preferred by our customers.  The focus at Ritherdon on the higher end of quality and safety in our industrial metering panel designs.

With the introduction of the Building Network Operator, organisations responsible for multi-occupancy buildings (e.g. landlords) now have more options for how they manage their networks and also what metering equipment they use.  Our “BNO CT Chamber” has a long track record in the south and south east of England (UKPN network) and is described as the “Rolls Royce” of CT Chambers due to its build quality and safety features.  It is also relatively small and versatile making it much easier to install.

Building Network Operators

A Building Network Operator (BNO) is an “organisation (often the owner or landlord) who operates the electricity distribution network within a multiple occupancy building between the intake and the customers’ installations”.

In this situation the responsibility of the Distribution Network Operator (DNO) now ends just above the “cut out” or “intake position” and, as long as the Wiring Regs (BS 7671) are adhered to and the P283 commissioning test is carried out, it is the BNO’s choice which CT Chamber is installed.

Installation Service

From early in 2017 Ritherdon will be teaming up with Siemens to offer the supply and installation service for our CT Chamber.  Please get in touch if you want to discuss this option.

The ‘BNO CT Chamber’

In a BNO-managed building, the responsibility of the DNO now ends just on the usage side of the cut out (intake position) and, as long as the Wiring Regs are followed, the choice of electrical equipment beyond this point is the BNO’s.

What is a CT Chamber?

When the supply to a site needs to be greater than 100 A (~70 kVA at 415 V) then the electricity meter works with current transformers (CTs) houses within their own enclosure – the CT chamber.  The power cables come onto the site, via a cut-out unit, into the CT Chamber and the Meter Operator typically mounts their meter on the CT chamber.

Reasons to use the Ritherdon CT Chamber:
  • Designed to accommodate 100 A – 600 A supplies.
  • Proven track record as the ‘top of the range’ unit for installation, quality and safety features in the southeast of England.
  • Intuitive Design – Flexibility.
  • Built-in flexibility, so they can be installed in a variety of positions to accommodate incoming supply from either the top or the bottom.
  • The front panel can be hinged from either side to accommodate local space and access requirements.
  • Avoids the requirement for costly lugging of tails.  Our CT panels are designed to accept sector stranded, sector solid or rounded stranded conductors.
  • Accepted by all meter operators.
  • The meter operator can house their meter on the front panel. This avoids requirement for further meter panels and the complexity of running multicore wiring to adjacent locations.
Supply and fitting service from Ritherdon

We are currently working with Siemens to set up a supply and installation service early in 2017.  With the Ritherdon CT Chamber and Siemens’ expertise (>5000 low voltage CT connections each year, P283 commissioning capabilities etc), you will eliminate several costly stages when installing a metered supply to your site.  We will look after the organisation of all the stages between the DNO installing their cable and the meter operator installing the meter.

Please get in touch if you’d like to discuss how we can help you with you installation.