Skip to content


We use cookies to ensure that we give you the best experience on our website. If you continue without changing your settings, we'll assume that you are happy to receive all cookies on the Electricity North West website. However, if you would like to, you can change your cookie settings at any time.

Continue      Find out more

Adjust text size:   A   A   A


Auto-reclosing is employed on 132kV, 33kV, 11kV and 6.6kV networks. Delayed auto-reclosing at 132kV is detailed in CP338 - 132kV Protection.

The policy for application on the 33kV, 11kV and 6.6kV networks is detailed in EPD321 - Policy for automatic reclosing of 33/11/6.6kV overhead lines.

Auto-reclosing is:

  • utilised at 33kV but only in the form of a single shot reclose initiated from the main protection, and inhibited by a permanent intertrip-receive or busbar protection operation.
  • employed extensively at 11kV and 6.6kV to ensure that as far as possible supplies are maintained for non-damage faults on overhead line networks.

Modern reclosers are utilised in conjunction with existing reclosers, sectionalisers and auto-sectionalising links.

The maximum number of trips is four with the preferred mode of operation to utilise two instantaneous protection trips followed by two inverse definite minimum time (IDMT) trips.

The number of instantaneous trips can be varied but the last trip will always be IDMT. There will be a standard dead time of 5s between each reclosure and a reclaim time of 15s.

Sensitive earth fault protection is also used and a single auto-reclose shot is allowed following a trip.

Modern reclosers and protection also employ sequence co-ordination to minimise the number of trips seen on the network, and this is to be employed wherever possible.

Are you a priority customer?

We appreciate that some customers have additional requirements and may have circumstances where a priority service is needed for a variety of reasons.

Learn more

Knowledge centre

Find answers to questions about Electricity North West, including details on electricity connections, power cuts and general enquiries

Check out frequently asked questions and our user guides.

Read more

New website coming soon!

Thanks for visiting our site. We're launching a new website on Monday 30 October, so you may notice some minor disruption to this existing site in the evening when we switch over.

If you need to get in touch and the site is unavailable, you can find us on Twitter or Facebook. In an emergency, contact us by calling free on 105.