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NR - RT/E/WI/27069 ISSUE 1 - INSTRUCTION FOR THE ROUTINE MAINTENANCE OF 25 KV VACUUM CIRCUIT BREAKERS: GEC TYPE XE2, X82S, SOUTH WALES SWITCHGEAR TYPE 82XEM & OTHER EQUIPMENT WITHIN THE HV CHAMBER - COMPLIANCE DATE: 3 AUGUST 2002 Organization: NR
Date: 2004-12-04
Description: Introduction Staff are reminded that before any work ...
DS/EN 61166 - HIGH-VOLTAGE ALTERNATING CURRENT CIRCUIT-BREAKERS - GUIDE FOR SEISMIC QUALIFICATION OF HIGH-VOLTAGE ALTERNATING CURRENT CIRCUIT-BREAKERS Organization: DS
Date: 1994-08-23
Description: This European Standard specifies seismic severity levels and gives a choice of methods that can be applied to demonstrate the performance of HV circuit breakers for which seismic qualification is required.
IEC 61166 - HIGH-VOLTAGE ALTERNATING CURRENT CIRCUIT-BREAKERS - GUIDE FOR SEISMIC QUALIFICATION OF HIGH-VOLTAGE ALTERNATING CURRENT CIRCUIT-BREAKERS - EDITION 1.0 Organization: IEC
Date: 1993-03-01
Description: Scope and Object This International Standard applies only to ground mounted high-voltage (HV) circuit-breakers, the supporting structures of which are rigidly connected with the ground, and does not cover the seismic qualification of circuit-breakers in metal enclosed switchgear.The seismic qualification of the HV circuit-breakers shall take into account any auxiliary and control equipment which is mounted on the circuit-breaker structure.
NR/L3/ELP/27122 ISSUE 3 - LOSS OF HIGH VOLTAGE SUPPLY TO, OR THE TRIPPING OF, A HIGH VOLTAGE CIRCUIT BREAKER FOR NO KNOWN REASON IN A SUBSTATION BUILDING CONTAINING METAL CLAD SWITCHGEAR WITH BITUMASTIC COMPOUND FILLED BUSBAR CHAMBERS - COMPLIANCE DATE: 26 AUGUST 2008 Organization: NR
Date: 2008-06-01
Description: General This instruction applies to switchgear operating at 11kV and above. If the High Voltage (HV) supply is lost or a HV circuit breaker operates for no known reason in a building equipped with Metal Clad Switchgear with Bitumastic Compound Filled Busbar Chambers and staff are present at that location, the following instructions shall be carried out.
IEEE C37.016 - STANDARD FOR AC HIGH-VOLTAGE CIRCUIT SWITCHERS RATED 15.5 KV THROUGH 245 KV Organization: IEEE
Date: 2006-12-06
Description: This application guide applies to ac high voltage circuit breakers rated for shunt reactor switching. The guide covers the specific cases of switching directly grounded shunt reactors, ungrounded shunt reactors and shunt reactors grounded through a neutral reactor.
NG TS 3.24.16 - NATIONAL GRID TECHNICAL SPECIFICATIONS - DELAYED AUTOMATIC RECLOSING (DAR) - ISSUE 1 Organization: NG
Date: 2000-05-01
Description: This specification describes the functional and performance requirements for single shot three-phase Delayed Automatic Reclosure (DAR) for busbar connected feeder circuits and transformer LV circuit breakers, when the transformer's HV connection is banked/connected to a mesh/busbar corner.
NG TS 3.24.63 - NATIONAL GRID TECHNICAL SPECIFICATIONS - MESH STATION DAR AND PLANT ISOLATION - ISSUE 1 Organization: NG
Date: 2001-05-01
Description: Post-fault, protection initiated, automatic switching encompasses automatic isolation of Mesh Corner connected feeders, transformers or other plant by opening associated HV disconnectors as required followed by Delayed Automatic Reclosure (DAR) of Mesh Corner HV and LV circuit breakers as required to re-energise remaining non-isolated plant. Where specified in the contract, the automatic switching functionality shall accommodate variations in plant topology and sizing.
NG TS 3.06.14 - NATIONAL GRID TECHNICAL SPECIFICATIONS - COPPERWORK PROTECTION - ARCHIVED; ISSUE 3 Organization: NG
Date: 1999-02-01
Description: This Specification covers: (i) The protection of common connections between two or more plant items, where there is no separating circuit breaker, eg mesh corner. (ii) The protection of transformer HV and LV connections, or mechanically switched capacitor (MSC) connections, where separate zones of protection from the plant protection are required.
MODUK - DEF STAN 02-530 - REQUIREMENTS FOR MAIN AND DISTRIBUTION SWITCHGEAR - ISSUE 2: 02.04; CATEGORY 2 Organization: MODUK
Date: 2004-02-17
Description: The particular equipments covered are as follows: Main Supply Switchboards; Circuit Breakers; Distribution Switchboards; Control Boards; Change-Over Switches (COS).
NG DH 06 - DESIGN HANDBOOK - APPLICATION & SETTING OF SUBSTATION LVAC SUPPLY EQUIPMENT - ISSUE 2 Organization: NG
Date: 2013-07-08
Description: The complete LVAC system design will consist of a number of Circuit Breakers (ACBs or MCCBs with integral protection modules), and Switch/Fuse units.

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