Ring main unit energy storage battery standard

Why are ring main units important?

When it comes to delivering electricity to people, it's crucial that the process is efficient, dependable, and safe. That's why Ring Main Units (RMUs) have become essential in medium voltage distribution networks. They offer compact and adaptable ways to distribute power.

What is a ring main unit?

Ring main units can be characterized by their type of insulation: air, oil or gas. The switch used to isolate the transformer can be a fusible switch, or may be a circuit breaker using vacuum or gas-insulated interrupters. The unit may also include protective relays to operate the circuit breaker on a fault.

What are the requirements for a ring main unit?

The Ring Main Unit itself must comply with the requirements of AS 62271.200 Annex A.2, Accessibility Type AFL. Operators of the Equipment must be protected against the effects of an arcing fault in any of the MV compartment at all times, including while carrying out maintenance work on other compartments.

Can a 1 way unitised ring main switchgear be extended?

All 1-way unitised ring main switchgear must be supplied as extensible from both left and right sides i.e. double extensible. Horizon Power will couple a 1-way unitised RMU to a 3-way or 4-way RMU, to form a 4-way or 5-way Extended RMU respectively.

What are ring main cables used for?

Ring main cables enter and leave the cabinet. This type of switchgear is used for medium-voltage power distribution, from 7200 volts to about 36000 volts. The ring main unit was introduced in the United Kingdom and is now widely used in other countries.

What is extended ring main switchgear?

Extensible ring main switchgear: means a 3-way or 4-way unitised ring main switchgear unit that is capable of been extended by one switchgear function. The extension transforms the RMU to become a 4-way or a 5-way respectively. The extended unit has a separate tank from the main unit.