British Standards (BSI)

These standards are the whole of the prescriptions on the basis of which machines, apparatus, materials and the installations should be designed, manufactured and tested so that efficiency and function safety are ensured – and all according to the UK Electrical Industry British Standards (BS).

The technical standards, published by BS, are circumstantially drawn up and can have legal force when this is attributed by a legislative measure.

British Standards (BS) – The List

BS 88-2
Published 2007
Low-voltage fuses: Supplementary requirements for fuses for use by authorized persons (fuses mainly for industrial application). Examples of standardized systems of fuses A to I

BS 88-3
Published 2007
Low-voltage fuses: Supplementary requirements for fuses for use by unskilled persons (fuses mainly for household or similar applications). Examples of standardized systems of fuses A to F

BS 4363
Published 1998, Confirm Date 01 December 2007
Specification for distribution assemblies for reduced low voltage electricity supplies for construction and building sites

BS 4737-3.2
Publication Date 31 May 1977, Confirm Date 01 November 2007
Intruder alarm systems. Specifications for components. Foil on glass

BS 4737-3.3
Publication Date 31 May 1977, Confirm Date 01 November 2007
Intruder alarm systems. Specifications for components. Protective switches

BS 4737-3.5
Publication Date 30 November 1978, Confirm Date 01 November 2007
Intruder alarm systems. Specifications for components. Ultrasonic movement detectors

BS 4737-3.6
Publication Date 30 November 1978, Confirm Date 01 November 2007
Intruder alarm systems. Specifications for components. Acoustic detectors

BS 4737-3.8
Publication Date 29 December 1978, Confirm Date 01 November 2007
Intruder alarm systems. Specifications for components. Volumetric capacitive detectors

BS 4737-3.9
Publication Date 30 November 1978, Confirm Date 01 November 2007
Intruder alarm systems. Specifications for components. Pressure mats

BS 4737-3.10
Publication Date 30 November 1978, Confirm Date 01 November 2007
Intruder alarm systems. Specifications for components. Vibration detectors

BS 4737-3.12
Publication Date 30 November 1978, Confirm Date 01 November 2007
Intruder alarm systems. Specifications for components. Beam interruption detectors

BS 4737-4-3
Publication Date 30 December 1988, Confirm Date 01 November 2007
Intruder alarm systems in buildings. Codes of practice. Code of practice for exterior alarm systems

BS 4737-5.2
Publication Date 31 August 1988, Confirm Date 01 November 2007
Intruder alarm systems. Terms and symbols. Recommendations for symbols for diagrams

BS 5266-1
(replaces BS 5266-1:2005, BS 5266-10:2008)
Publication Date 30 November 2011
Emergency lighting. Code of practice for the emergency lighting of premises

BS 5266-4
Publication Date 15 July 1999, Confirm Date 01 February 2004
Emergency lighting. Code of practice for design, installation, maintenance and use of optical fibre systems

BS 5308-1
Publication Date 28 November 1986, Confirm Date 01 November 2005
Instrumentation cables. Specification for polyethylene insulated cables

BS 5308-2
Publication Date 28 November 1986, Confirm Date 01 November 2005
Instrumentation cables. Specification for PVC insulated cables

BS 5467
Publication Date 15 October 1997 +A3:2008
Electric Cables: Thermosetting insulated, armoured cables for voltages of 600/1000V and 1900/3300V

BS 5839-1
Publication Date 15 October 2002 +A2:2008
Fire detection and fire alarm systems for buildings. Code of practice for system design, installation, commissioning and maintenance

BS 5839-3
Publication Date 29 April 1988 (Confirm Date 01 October 2008)
Fire detection and alarm systems for buildings. Specification for automatic release mechanisms for certain fire protection equipment

BS 5839-6
Publication Date 15 September 2004
Fire detection and fire alarm systems for buildings. Code of practice for the design, installation and maintenance of fire detection and fire alarm systems in dwellings

BS 5839-8
Publication Date 30 May 2008 (Replaces BS 5839-8:1998)
Fire detection and fire alarm systems for buildings. Code of practice for the design, installation, commissioning and maintenance of voice alarm systems

BS 5839-9
Publication Date 31 January 2011
Fire detection and alarm systems for buildings. Code of practice for the design, installation, commissioning and maintenance of emergency voice communication systems

BS 6004
(Partially replaced by BS EN 50525-1:2011 BS EN 50525-2-31:2011 and BS EN 50525-2-51:2011)
Publication Date 15 December 2000, Confirm Date 01 May 2006
Electric cables. PVC insulated, non-armoured cables for voltages up to and including 450/750 V, for electric power, lighting and internal wiring

BS 6007
(Replaced by BS EN 50525-1:2011 BS EN 50525-2-41:2011 and BS EN 50525-2-42:2011 but remains current)
Publication Date 17 February 2006
Electric cables. Single core unsheathed heat resisting cables for voltages up to and including 450/750 V, for internal wiring

BS 6266
Publication Date 31 August 2011
Fire protection for electronic equipment installations. Code of practice

BS 6231
Publication Date 31 July 2006
Electric cables: Single core PVC insulated flexible cables of rated voltage 600/1000 V for switchgear and controlgear wiring

BS 6387
Publication Date 15 January 1994, Confirm Date 01 October 2005
Specification for performance requirements for cables required to maintain circuit integrity under fire conditions

BS 6396
Publication Date 25 July 2008
Electrical systems in office furniture and office screens. Specification

BS 6485
Publication Date 15 February 1999, Confirm Date 01 October 2005
PVC-covered conductors for overhead power lines

BS 6622
Publication Date 30 March 2007
Electric cables: Armoured cables with thermosetting insulation for rated voltages from 3.8/6.6 kV to 19/33 kV. Requirements and test methods

BS 6651
Publication Date 15 September 1999, withdrawn 31 August 2008, Replaced by BS EN 62305:2006
Code of practice for protection of structures against lightning

BS 6724
Publication Date 15 September 1997, +A3:2008
Electric cables: Thermosetting insulated, armoured cables for voltages of 600/1000 V and 1900/3300 V, having low emission of smoke and corrosive gases when affected by fire

BS 7211
(Partially Replaced by BS EN BS EN 50525-1:2011 and BS EN 50525-3-41:2011)
Publication Date 15 October 1998, Confirm Date 01 October 2005
Electric cables. Thermosetting insulated, non-armoured cables for voltages up to and including 450/750 V, for electric power, lighting and internal wiring, and having low emission of smoke and corrosive gases when affected by fire

BS 7346-6
(Replaced By BS 8519:2010)
Publication Date 31 March 2005
Components for smoke and heat control systems. Specifications for cable systems

BS 7375
Publication Date 15 November 1996
Code of practice for distribution of electricity on construction and building sites

BS 7430
Publication Date 15 November 1998
Code of practice for earthing

BS 7629-1
Publication Date 15 April 1997, Confirm Date 01 August 2007
Specification for 300/500 V fire resistant electric cables having low emission of smoke and corrosive gases when affected by fire. Multicore cables

BS 7671:2008 +A1
Publication Date 01 July 2011
Requirements for electrical installations. IEE Wiring Regulations. Seventeenth edition

BS 7767
Publication Date 15 July 1994
Method for assessing the short-circuit withstand strength of partially type-tested assemblies (PTTA)

BS 7889
Publication Date 15 October 1997, Confirm Date 01 November 2007
Electric cables. Thermosetting insulated, unarmoured cables for a voltage of 600/1000 V

BS 8431
Publication Date 31 May 2010
Electrical static meters for secondary metering and sub-metering. Specification

BS 8434-2
Publication Date 14 August 2003
Methods of test for assessment of the fire integrity of electric cables. Test for unprotected small cables for use in emergency circuits. BS EN 50200 with 930 deg flame and with water spray

BS 8436
Publication Date 12 August 2004
Electric cables. 300/500 V screened electric cables having low emission of smoke and corrosive gases when affected by fire, for use in walls, partitions and building voids. Multicore cables

BS 8488-1
28 February 2009
Prefabricated wiring systems intended for permanent connection in fixed installations. Specification

BS 8512
Publication Date 31 March 2008
Electric cables. Code of practice for the storage, handling, installation and disposal of cables on wooden drums

BS 8519
Publication Date 28 February 2010
Selection and installation of fire-resistant power and control cable systems for life safety and fire-fighting applications. Code of practice

BS EN 13032-3
Publication Date 30 November 2007
Measurement and presentation of photometric data of lamps and luminaires. Presentation of data for emergency lighting of work places

BS EN 15265
Publication Date 28 September 2007
Energy performance of buildings. Calculation of energy needs for space heating and cooling using dynamic methods. General criteria and validation procedures

BS EN 16001
Publication Date 31 July 2009
Energy management systems. Requirements with guidance for use

BS EN 1838 (BS 5266-7:1999)
Publication Date 15 October 1999
Lighting applications. Emergency lighting

BS EN 50110-1
Publication Date 31 May 2007
Operation of electrical installations

BS EN 50117-1
Publication Date 06 September 2002
Coaxial cables. Generic specification

BS EN 50131-1:2006+A1:2009
Publication Date 30 November 2006 (Amendment August 2009. Amends and replaces BS EN 50131-1:2006)
Alarm systems. Intrusion and hold-up systems. System requirements

BS EN 50160
Publication Date 31 August 2010 (Amended March 2011)
Voltage characteristics of electricity supplied by public electricity networks

BS EN 50174-1:2009
Publication Date 31 July 2009
Information technology. Cabling installation. Installation specification and quality assurance

BS EN 50272
Publication Date 28 February 2011
Safety requirements for secondary batteries and battery installations.
General safety information

BS EN 50274
Publication Date 23 July 2002
Low-voltage switchgear and controlgear assemblies. Protection against electric shock. Protection against unintentional direct contact with hazardous live parts.

BS EN 50295 (Withdrawn)
Withdrawn Date 01 February 2005, Replaced By BS EN 62208:2003
Low-voltage switchgear and controlgear. Controller and device interface systems. Actuator sensor interface (AS-i)

BS EN 50298 (Withdrawn)
Withdrawn Date 01 February 2005 Replaced By BS EN 62208:2003
Empty enclosures for low-voltage switchgear and controlgear assemblies. General requirements

BS EN 50300 (withdrawn)
Withdrawn Date 30 November 2006
Low-voltage switchgear and controlgear assemblies. General requirements for low-voltage substation cable distribution boards

BS EN 50368
Publication Date 31 October 2003
Cable cleats for electrical installations

BS EN 50393 (Supercedes BS 7888 -3)
Publication Date 31 August 2006
Test methods and requirements for accessories for use on distribution cables of rated voltage 0,6/1,0 (1,2) kV

BS EN 50464-2-1
Publication Date 31 August 2007
Three-phase oil-immersed distribution transformers 50 Hz, from 50 kVA to 2500 kVA with highest voltage for equipment not exceeding 36 kV. Distribution transformers with cable boxes on the high-voltage and/or low-voltage side. General requirements

BS EN 50464-2-2
Publication Date 31 August 2007
Three-phase oil-immersed distribution transformers 50 Hz, from 50 kVA to 2 500 kVA with highest voltage for equipment not exceeding 36 kV. Distribution transformers with cable boxes on the high-voltage and/or low-voltage side. Cable boxes type 1 for use on distribution transformers meeting the requirements of EN 50464-2-1

BS EN 50464-2-3
Publication Date 31 August 2007
Three-phase oil-immersed distribution transformers 50 Hz, from 50 kVA to 2500 kVA with highest voltage for equipment not exceeding 36 kV. Distribution transformers with cable boxes on the high-voltage and/or low-voltage side. Cable boxes type 2 for use on distribution transformers meeting the requirements of EN 50464-2-1

BS EN 50525-1
Publication Date 30 September 2011
Electric cables. Low voltage energy cables of rated voltages up to and including 450/750 V (U0/U). General requirements

BS EN 60076-2
Publication Date 31 May 2011
Power transformers. Temperature rise for liquid-immersed transformers

BS EN 60079-14
Publication Date 31 January 2009
Explosive atmospheres. Electrical installations design, selection and erection

BS EN 60079-15
Publication Date 30 September 2010
Explosive atmospheres. Equipment protection by type of protection “n”

BS EN 60079-17
Publication Date 31 October 2007
Explosive atmospheres. Electrical installations inspection and maintenance

BS EN 60079-18
Publication Date 30 September 2010
Explosive atmospheres. Equipment protection by encapsulation “m”

BS EN 60081 + Amendment 4 (2010)
Publication Date 15 April 1998
Double-capped fluorescent lamps. Performance specifications

BS EN 60204-1
Publication Date 30 June 2006
Safety of machinery. Electrical equipment of machines. General requirements

BS EN 60238 2004+A1:2009
Publication Date 20 January 2005 (Amendment June 2009. Amends and replaces BS EN 60238:2004.)
Edison screw lampholders

BS EN 60269-1 (BS 88-1:2007)
Publication Date 29 June 2007
Low-voltage fuses. General requirements

BS EN 60309-2
Publication Date 15 October 1999
Plugs, socket-outlets and couplers for industrial purposes. Dimensional interchangeability requirements for pin and contact-tube accessories

BS EN 60309-4
Publication Date 31 July 2007
Plugs, socket-outlets and couplers for industrial purposes. Switched socket-outlets and connectors, with or without interlock

BS EN 60439-1
Publication Date 15 December 1999
Low-voltage switchgear and controlgear assemblies. Type-tested and partially type-tested assemblies

BS EN 60439-2
Publication Date 15 September 2000
Specification for low-voltage switchgear and controlgear assemblies. Particular requirements for busbar trunking systems (busways)

BS EN 60439-3
Publication Date 28 June 1991
Specification for low-voltage switchgear and controlgear assemblies. Particular requirements for low-voltage switchgear and controlgear assemblies intended to be installed in places where unskilled persons have access to their use. Distribution boards

BS EN 60439-4
Publication Date 11 January 2005
Specification for low-voltage switchgear and controlgear assemblies . Particular requirements for assemblies for construction sites (ACS)

BS EN 60439-5
Publication Date 30 November 2006
Low-voltage switchgear and controlgear assemblies. Particular requirements for assemblies for power distribution in public networks

BS EN 60529
Publication Date 31 January 1992, Confirm Date 01 October 2004
Specification for degrees of protection provided by enclosures (IP code)

BS EN 60546-1
Publication Date 28 February 2011
Controllers with analogue signals for use in industrial-process control systems.
Methods of evaluating the performance

BS EN 60598-1 (2008)
Publication Date 16 November 2004 (Amendment November 2009)
Luminaires. General requirements and tests

BS EN 60598-2-5
Publication Date 15 July 1998
Luminaires. Particular requirements. Floodlights

BS EN 60598-2-13
Publication Date 29 September 2006
Luminaires. Particular requirements. Ground recessed luminaires

BS EN 60598-2-22
Publication Date 15 March 1999
Luminaires. Particular requirements. Luminaires for emergency lighting

BS EN 60664-1
Publication Date 31 August 2007
Insulation coordination for equipment within low-voltage systems. Principles, requirements and tests

BS EN 60664-5
Publication Date 31 December 2007
Insulation coordination for equipment within low-voltage systems. Comprehensive method for determining clearances and creepage distances equal to or less than 2 mm

BS EN 60715
Publication Date 15 August 2001
Dimensions of low-voltage switchgear and controlgear. Standardized mounting on rails for mechanical support of electrical devices in switchgear and controlgear installations

BS EN 60898-1
Publication Date 09 September 2003, A1 2004
Electrical accessories. Circuit breakers for overcurrent protection for household and similar installations. Circuit-breakers for a.c. operation

BS EN 60898-2
Publication Date 31 October 2006
Electrical accessories. Circuit-breakers for overcurrent protection for household and similar installations. Circuit-breakers for a.c and d.c. operation.

BS EN 60947-1
Publication Date 31 August 2007
Specification for low-voltage switchgear and controlgear. General rules

BS EN 60947-2
Publication Date 29 September 2006
Amendment A1: December 2009
Low-voltage switchgear and control gear. Circuit-breakers

BS EN 60947-3
Publication Date 31 July 2009
Low voltage switchgear and controlgear. Switches, disconnectors, switch-disconnectors and fuse-combination units

BS EN 60947-4-1
Publication Date 15 August 2001
Low-voltage switchgear and controlgear. Contactors and motor-starters. Electromechanical contactors and motor-starters

BS EN 60947-4-2
Publication Date 15 June 2000
Low-voltage switchgear and controlgear. Contactors and motor-starters. AC semiconductor motor controllers and starters

BS EN 60947-4-3
Publication Date 15 August 2000
Low-voltage switchgear and controlgear. Contactors and motor-starters. AC semiconductor controllers and contactors for non-motor loads

BS EN 60947-5-1
Publication Date 28 June 2004
Low-voltage switchgear and controlgear. Control circuit devices and switching elements. Electromechanical control circuit devices

BS EN 60947-5-2
Publication Date 29 February 2008
Low-voltage switchgear and controlgear. Control circuit devices and switching elements. Proximity switches

BS EN 60947-5-3
Publication Date 15 September 1999
Low-voltage switchgear and controlgear. Control circuit devices and switching elements. Requirements for proximity devices with defined behaviour under fault conditions (PDF)

BS EN 60947-5-4
Publication Date 18 December 2003
Low-voltage switchgear and controlgear. Control circuit devices and switching elements. Method of assessing the performance of low-energy contacts. Special tests

BS EN 60947-5-6
Publication Date 18 December 2003
Low-voltage switchgear and controlgear. Control circuit devices and switching elements. DC interface for proximity sensors and switching amplifiers (NAMUR). DC interface for proximity sensors and switching amplifiers (NAMUR)

BS EN 60947-5-7
Publication Date 16 October 2003
Low-voltage switchgear and controlgear. Control circuit devices and switching elements. Requirements for proximity devices with analogue output

BS EN 60947-5-8
Publication Date 31 January 2007
Low-voltage switchgear and controlgear. Control circuit devices and switching elements. Three-position enabling switches

BS EN 60947-5-9
Publication Date 31 January 2008
Low-voltage switchgear and controlgear. Control circuit devices and switching elements. Flow rate switches

BS EN 60947-6-1
Publication Date 01 February 2006
Low-voltage switchgear and controlgear. Multiple function equipment. Transfer switching equipment

BS EN 60947-6-2
Publication Date 26 June 2003
Low-voltage switchgear and controlgear. Multiple function equipment. Control and protective switching devices (or equipment) (CPS)

BS EN 60947-7-1
Publication Date 28 November 2002
Specification for low-voltage switchgear and controlgear. Ancillary equipment. Terminal blocks for copper conductors

BS EN 60947-7-2
Publication Date 27 November 2002
Specification for low-voltage switchgear and controlgear. Ancillary equipment. Protective conductor terminal blocks for copper conductors

BS EN 60947-7-3
Publication Date 27 November 2002
Specification for low-voltage switchgear and controlgear. Ancillary equipment. Safety requirements for fuse terminal blocks

BS EN 61000-3-2 + Amendment 2: 2009
Publication Date 31 May 2006
Electromagnetic compatibility (EMC). Limits. Limits for harmonic current emissions (equipment input current ≤ 16 A per phase)

BS EN 61000-4-2
Publication Date 31 May 2009
Electromagnetic compatibility (EMC). Testing and measurement techniques. Electrostatic discharge immunity test

BS EN 61000-4-3 + Amendment 2: 2010
Publication Date 31 July 2006
Electromagnetic compatibility (EMC) -. Part 4-3: Testing and measurement techniques – Radiated, radio-frequency, electromagnetic field immunity test

BS EN 61000-4-4 + Amendment 1: 2010
Publication Date 02 February 2005
Electromagnetic compatibility (EMC). Testing and measurement techniques. Electrical fast transient/burst immunity test

BS EN 61000-4-6
Publication Date 31 May 2009
Electromagnetic compatibility (EMC). Testing and measurement techniques. Immunity to conducted disturbances, induced by radio-frequency fields

BS EN 61008 -1
Publication Date 28 April 2006
Residual current operated circuit-breakers without integral overcurrent protection for household and similar used (RCCBs). General rules

BS EN 61008-2-1
Publication Date 15 March 1995
Specification for residual current operated circuit-breakers without integral overcurrent protection for household and similar uses (RCCBs). Applicability of the general rules to RCCBs functionally independent of line voltage

BS EN 61009 -1
Publication Date 15 March 2005
Residual current operated circuit-breakers with integral overcurrent protection for household and similar uses (RCBO’s). General rules

BS EN 61009-2-1
Publication Date 15 March 1995
Specification for residual current operated circuit-breakers with integral overcurrent protection for household and similar uses (RCBOs). Applicability of the general rules to RCBOs functionally independent of line voltage

BS EN 61347-2-11
Publication Date 07 March 2002
Lamp controlgear. Particular requirements for miscellaneous electronic circuits used with luminaires

BS EN 61386-1
(Replaces BS EN 61386-1:2004 )
Publication Date 30 September 2008
Conduit systems for cable management. General requirements

BS EN 61439-1
Publication Date 31 January 2010
Low-voltage switchgear and controlgear assemblies. General rules

BS EN 61439-2
Publication Date 31 January 2010
Low-voltage switchgear and controlgear assemblies. Power switchgear and controlgear assemblies

BS EN 61439-1
Low-voltage switchgear and controlgear assemblies. General rules
Publication Date January 2010

BS EN 61508-1
Publication Date 30 June 2010
Functional safety of electrical/electronic/ programmable electronic safety-related systems
General requirements

BS EN 61508-2
Publication Date 30 June 2010
Functional safety of electrical/electronic/ programmable electronic safety-related systems
Requirements for electrical/ electronic/ programmable electronic safety-related systems

BS EN 61508-3
Publication Date 30 June 2010
Functional safety of electrical/electronic/ programmable electronic safety-related systems
Software requirements

BS EN 61508-4
Publication Date 30 June 2010
Functional safety of electrical/electronic/ programmable electronic safety-related systems
Definitions and abbreviations

BS EN 61508-5
Publication Date 30 June 2010
Examples of methods for the determination of safety integrity levels

BS EN 61508-6
Publication Date 30 June 2010
Functional safety of electrical/electronic/ programmable electronic safety-related systems
Guidelines on the application of IEC 61508-2 and IEC 61508-3

EN 61508-7
Publication Date 30 June 2010
Functional safety of electrical/electronic/ programmable electronic safety-related systems
Overview of techniques and measures

BS EN 61535:2009
(Replaces BS 61535:2006)
Publication Date 30 September 2009
Installation couplers intended for permanent connection in fixed installations

BS EN 61558:2009-1:2005+A1:2009
Publication Date 28 April 2006
Safety of power transformers, power supplies, reactors and similar products. General requirements and tests

BS EN 61915-1
Publication Date 31 March 2008
Low-voltage switchgear and controlgear. Device profiles for networked industrial devices. General rules for the development of device profiles

BS EN 61921
Publication Date 27 October 2003
Power capacitors. Low-voltage power factor correction banks

BS EN 61958
Publication Date 08 April 2002
High-voltage prefabricated switchgear and controlgear assemblies. Voltage presence indicating systems

BS EN 62026-1
Publication Date 31 October 2007
Low-voltage switchgear and controlgear. Controller-device interfaces (CDIs). General rules

BS EN 62040-1-2
Publication Date 24 February 2003
Uninterruptible power systems (UPS). General and safety requirements for UPS used in restricted access locations

BS EN 62208
Publication Date 16 February 2004
Empty enclosures for low-voltage switchgear and controlgear assemblies. General requirements

BS EN 62271-1
Publication Date 31 March 2009
High-voltage switchgear and controlgear. Common specifications

BS EN 62271-100
Publication Date 31 July 2009
High-voltage switchgear and controlgear. Alternating current circuit-breakers

BS EN 62271-105
Publication Date 02 September 2004
High-voltage switchgear and controlgear. Alternating current switch-fuse combinations

BS EN 62271-107
Publication Date 31 March 2006
High-voltage switchgear and controlgear. Alternating current fused circuit-switchers for rated voltages above 1 kV up to and including 52 kVHigh-voltage switchgear and controlgear

BS EN 62271-108
Publication Date 31 May 2006
High-voltage switchgear and controlgear. High-voltage alternating current disconnecting circuit-breakers for rated voltages of 72,5 kV and above

BS EN 62271-109
Publication Date 28 February 2007
High-voltage switchgear and controlgear. Alternating-current series capacitor by-pass switches

BS EN 62271-110
Publication Date 31 March 2006
High-voltage switchgear and controlgear. Inductive load switching

BS EN 62271-200
Publication Date 31 October 2005
High-voltage switchgear and controlgear. AC metal-enclosed switchgear and controlgear for rated voltages above 1 kV and up to and including 52 kV

BS EN 62271-201
Publication Date 31 January 2007
High-voltage switchgear and controlgear. A.C. insulation-enclosed switchgear and controlgear for rated voltages above 1 kV and up to and including 52 kV

BS EN 62271-202
Publication Date 30 March 2007
High-voltage switchgear and controlgear. High voltage/low voltage prefabricated substation

BS EN 62271-207
Publication Date 31 March 2008
High-voltage switchgear and controlgear. Seismic qualification for gas-insulated switchgear assemblies for rated voltages above 52 kV

BS EN 62271-209
Publication Date 29 February 2008
High-voltage switchgear and controlgear. Cable connections for gas-insulated metal-enclosed switchgear for rated voltages above 52 kV. Fluid-filled and extruded insulation cables. Fluid-filled and dry-type cable-terminations

BS EN 62271-3
Publication Date 29 December 2006
High-voltage switchgear and controlgear. Digital interfaces based on IEC 61850

BS EN 62305-1
Publication Date 30 June 2011
Protection against lightning. General principles

BS EN 62305-2
Publication Date 29 September 2006
Protection against lightning. Risk management

BS EN 62305-3
Publication Date 30 June 2011
Protection against lightning. Physical damage to structures and life hazard

BS EN 62305-4
Publication Date 30 June 2011
Protection against lightning. Electrical and electronic systems within structures

BS EN 62341-1-1
Publication date 31 July 2009
Organic light emitting diode (OLED) displays. Generic specifications

BS EN 62384
Publication Date 30 November 2006
Amendment: A1 December 2009
DC or AC supplied electronic control gear for LED modules. Performance requirements

BS EN ISO 11161 (Amendment April 2010)
Publication Date 29 June 2007
Safety of machinery. Integrated manufacturing systems. Basic requirements

BS EN ISO 13943
Publication Date 31 December 2010
Fire safety. Vocabulary

BS EN ISO 16484-5
Publication Date 31 March 2008
Building automation and control systems. Data communication protocol

BS ISO 26382:2010
Publication Date February 2010
Cogeneration systems. Technical declarations for planning, evaluation and procurement

BS ISO 50001:2011
Publication Date 15 June 2011
Energy management systems. Requirements with guidance for use

PD CLC/TR 50479
Publication Date 29 June 2007
Electrical installation guide. Selection and erection of electrical equipment. Wiring systems.
Limitation of temperature rise of connecting interfaces

The information above was provided by the BSI. For more information, please use the following link.

Protection Relay - ANSI Standards

In the design of electrical power systems, the ANSI Standard Device Numbers denote what features a protective device supports (such as a relay or circuit breaker). These types of devices protect electrical systems and components from damage when an unwanted event occurs, such as an electrical fault.

ANSI numbers are used to identify the functions of medium voltage microprocessor devices.

ANSI facilitates the development of American National Standards (ANS) by accrediting the procedures of standards developing organizations (SDOs). These groups work cooperatively to develop voluntary national consensus standards.

Accreditation by ANSI signifies that the procedures used by the standards body in connection with the development of American National Standards meet the Institute’s essential requirements for openness, balance, consensus and due process.

ANSI standards (protection) – index

The protection of enclosures against ingress of dirt or against the ingress of water is defined in IEC529 (BSEN60529:1991). Conversely, an enclosure which protects equipment against ingress of particles will also protect a person from potential hazards within that enclosure, and this degree of protection is also defined as a standard.

The degrees of protection are most commonly expressed as ‘IP’ followed by two numbers, e.g. IP65, where the numbers define the degree of protection. The first digit shows the extent to which the equipment is protected against particles, or to which persons are protected from enclosed hazards. The second digit indicates the extent of protection against water.

The wording in the table is not exactly as used in the standards document, but the dimensions are accurate.

IP Degree of Protection according to EN/IEC 60529

Correlations between IP (IEC) and NEMA 250 standards

• IP10 -> NEMA 1
• IP11 -> NEMA 2
• IP54 -> NEMA 3 R
• IP52 -> NEMA 5-12-12 K
• IP54 -> NEMA 3-3 S
• IP56 -> NEMA 4-4 X
• IP67 -> NEMA 6-6 P

EMC product standard including specific test methods

The countries of the European Economic Area (EEA) have agreed on common minimum regulatory requirements in order to ensure the free movement of products within the EEA. The CE marking indicates that the product works in conformity with the directives that are valid for the product. The directives state the principles that must be followed. Standards specify the requirements that must be met. EN61800-3 (part 3) is the EMC product standard of adjustable speed electrical power drive systems (PDS).

Meeting the requirements of this standard, is the minimum condition for free trade of power electronics converters inside the EEA. EN61800-3 states, that the manufacturer shall provide in the documentation of the PDS, or on request, the current harmonic level, under rated conditions, as a percentage of the rated fundamental current on the power port.

The referenced values shall be calculated for each order at least up to the 25th.

The current THD (orders up to and including 40), and its high- frequency component PHD (orders from 14 to 40 inclusive) shall be evaluated.

For these standard calculations, the PDS shall be assumed to be connected to a PC with Rsc = 250 and with initial voltage distortion less than 1%. The internal impedance of the network shall be assumed to be a pure reactance.

In a low voltage public supply network, the limits and requirements of IEC1000-3-2 apply for equipment with rated current ≤ 16 A. The use of the future IEC1000-3-4 is recommended for equipment with rated current > 16 A. If PDS is used in an industrial installation, a reasonable economical approach, which considers the total installation, shall be used.

This approach is based on the agreed power, which the supply can deliver at any time. The method for calculating the harmonics of the total installation is agreed and the limits for either the voltage distortion or the total harmonic current emission are agreed on.

The compatibility limits given in IEC1000-2-4 may be used as the limits of voltage distortion.

IEC 61850 - Advantages and Key Features

One of the significant challenges that substation engineers face is justifying substation automation investments. The positive impacts that automation has on operating costs, increased power quality, and reduced outage response are well known. But little attention is paid to how the use of a communication standard impacts the cost to build and operate the substation.

Legacy communication protocols were typically developed with the dual objective of providing the necessary functions required by electric power systems while minimizing the number of bytes that were used by the protocol because of severe bandwidth limitations that were typical of the serial link technology available 10-15 years ago when many of these protocols were initially developed.

Later, as Ethernet and modern networking protocols like TCP/IP became widespread, these legacy protocols were adapted to run over TCP/IP-Ethernet.

This approach provided the same basic electric power system capabilities as the serial link version while bringing the advantages of modern networking technologies to the substation. But this approach has a fundamental flaw: the protocols being used were still designed to minimize the bytes on the wire and do not take advantage of the vast increase in bandwidth that modern networking technologies deliver by providing a higher level of functionality that can significantly reduce the implementation and operational costs of substation automation.

Modern Networking Technologies

These unique characteristics of IEC 61850 have a direct and positive impact on the cost to design, build, install, commission, and operate power systems. While legacy protocols on Ethernet enable the substation engineer to do exactly the same thing that was done 10-15 years ago using Ethernet, IEC 61850 enables fundamental improvements in the substation automation process that is simply not possible with a legacy approach, with or without TCP/IP-Ethernet.

To better understand the specific benefits we will first examine some of the key features and capabilities of IEC 61850 and then explain how these result in significant benefits that cannot be achieved with the legacy approach.

Key Features

The features and characteristics of IEC 61850 that enable unique advantages are so numerous that they cannot practically be listed here. Some of these characteristics are seemingly small but yet can have a tremendous impact on substation automation systems.

For instance, the use of VLANs and priority flags for GOOSE and SMV enable much more intelligent use of Ethernet switches that in and of itself can deliver significant benefits to users that aren’t available with other approaches. For the sake of brevity, we will list here some of the more key features that provide significant benefits to users:

Use of a Virtualized Model
The virtualized model of logical devices, logical nodes, ACSI, and CDCs enables definition of the data, services, and behavior of devices to be defined in addition to the protocols that are used to define how the data is transmitted over the network.

Use of Names for All Data
Every element of IEC 61850 data is named using descriptive strings to describe the data. Legacy protocols, on the other hand, tend to identify data by storage location and use index numbers, register numbers and the like to describe data.

All Object Names are Standardized and Defined in a Power System Context
The names of the data in the IEC 61850 device are not dictated by the device vendor or configured by the user. All names are defined in the standard and provided in a power system context that enables the engineer to immediately identify the meaning of data without having to define mappings that relate index numbers and register numbers to power system data like voltage and current.

Devices are Self-Describing
Client applications that communicate with IEC 61850 devices are able to download the description of all the data supported by the device from the device without any manual configuration of data objects or names.

High-Level Services
ACSI supports a wide variety of services that far exceeds what is available in the typical legacy protocol. GOOSE, GSSE, SMV, and logs are just a few of the unique capabilities of IEC 61850.

Standardized Configuration Language
SCL enables the configuration of a device and its role in the power system to be precisely defined using XML files.

Major Benefits

The features described above for IEC 61850 deliver substantial benefits to users that understand and take advantage of them. Rather than simply approaching an IEC 61850 based system in the same way as any other system, a user that understands and takes advantage of the unique capabilities will realize significant benefits that are not available using legacy approaches.

Eliminate Procurement Ambiguity

Not only can SCL be used to configure devices and power systems, SCL can also be used to precisely define user requirement for substations and devices. Using SCL a user can specify exactly and unambiguously what is expected to be provided in each device that is not subject to misinterpretation by suppliers.

Lower Installation Cost

IEC 61850 enables devices to quickly exchange data and status using GOOSE and GSSE over the station LAN without having to wire separate links for each relay. This significantly reduces wiring costs by more fully utilizing the station LAN bandwidth for these signals and construction costs by reducing the need for trenching, ducts, conduit, etc.

Lower Transducer Costs

Rather than requiring separate transducers for each device needing a particular signal, a single merging unit supporting SMV can deliver these signals to many devices using a single transducer lowering transducer, wiring, calibration, and maintenance costs.

Lower Commissioning Costs

The cost to configure and commission devices is drastically reduced because IEC 61850 devices don’t require as much manual configuration as legacy devices. Client applications no longer need to manually configured for each point they need to access because they can retrieve the points list directly from the device or import it via an SCL file.

Many applications require nothing more than setting up a network address in order to establish communications. Most manual configuration is eliminated drastically reducing errors and rework.

Lower Equipment Migration Costs

Because IEC 61850 defines more of the externally visible aspects of the devices besides just the encoding of data on the wire, the cost for equipment migrations is minimized. Behavioral differences from one brand of device to another is minimized and, in some cases, completely eliminated.

All devices share the same naming conventions minimizing the reconfiguration of client applications when those devices are changed.

Lower Extension Costs

Because IEC 61850 devices don’t have to be configured to expose data, new extensions are easily added into the substation without having to reconfigure devices to expose data that was previously not accessed. Adding devices and applications into an existing IEC 61850 system can be done with only a minimal impact, if any, on any of the existing equipment.

Lower Integration Costs

By utilizing the same networking technology that is being widely used across the utility enterprise the cost to integrate substation data into the enterprise is substantially reduced. Rather than installing costly RTUs that have to be manually configured and maintained for each point of data needed in control center and engineering office application, IEC 61850 networks are capable of delivering data without separate communications front-ends or reconfiguring devices.

Implement New Capabilities

The advanced services and unique features of IEC 61850 enables new capabilities that are simply not possible with most legacy protocols. Wide area protection schemes that would normally be cost prohibitive become much more feasible.

Because devices are already connected to the substation LAN, the incremental cost for accessing or sharing more device data becomes insignificant enabling new and innovative applications that would be too costly to produce otherwise.

Conclusions

IEC 61850 is now released to the industry. Ten parts of the standard are now International Standards (part 10 is a draft international standard). This standard addresses most of the issues that migration to the digital world entails, especially, standardization of data names, creation of a comprehensive set of services, implementation over standard protocols and hardware, and definition of a process bus.

Multi-vendor interoperability has been demonstrated and compliance certification processes are being established. Discussions are underway to utilize IEC 61850 as the substation to control center communication protocol. IEC 61850 will become the protocol of choice as utilities migrate to network solutions for the substations and beyond.

High-voltage switchgear and controlgear

Part 200: AC metal-enclosed switchgear and controlgear for rated voltages above 1 kV and up to and including 52 kV

IEC 62271-200 - HV Switchgear And Controlgear

Switchgears are important nodal points in modern power distribution. Correspondingly important is their reliable functioning, a clearly defined switching behavior according to specified parameters as well as the protection of personnel and protection against operational interruptions when an overload occurs.

The International Electrotechnical Commission (IEC) has taken up the task of developing the required specifications, their worldwide standardization and further development.

The same applies to IEC 62271-200 – the new standard for medium-voltage switchgear.

Retrospective

IEC 60298 – for four decades this abbreviation was the decisive factor for the type testing of metal-enclosed switchgear. In the meantime there are tens of thousands of switchgear panels of the primary and secondary distribution level based on this standard in use – certified according to the mandatory part of the standard and, if required, according to optional tests.

There is also the possibility of voluntarily certifying switchgear for resistance to internal arc faults and for personal protection. Manufacturers and operators can select the criteria which are relevant to them from the following six criteria and have them tested.

• Criterion 1: Doors and covers must not open.
• Criterion 2: Parts of the switchgear must not fl y off.
• Criterion 3: Holes must not develop in the external parts of the enclosure.
• Criterion 4: Vertical indicators must not ignite.
• Criterion 5: Horizontal indicators must not ignite.
• Criterion 6: Earth connections must remain effective.

In order to guarantee safe access to the individual switchgear components, e.g.the incoming cable, without isolating the busbar, the IEC 60298 standard differentiates between three types of compartmentalization that serve exclusively as protection against electric shock.

Metal-clad switchgear

Division of the switchgear panel into four compartments (busbar compartment, switching-device compartment, connection compartment and low-voltage compartment); partitions between the compartments made of sheet steel, front plate made of sheet steel or insulating material.

Compartmented switchgear

Division of the switchgear panel same as for metal-clad switchgear, but with the partitions between the individual compartments made of insulating material.

Cubicle-type switchgear

All other types of construction that do not meet the above features of the metal-clad or compartmented designs.

In this context, access to the then common minimum-oil-content circuit-breakers for maintenance work without longer operational interruptions was of prime importance because of the limited number of operating cycles. Therefore, with switchgear in metalclad or compartmented design, the busbar in the busbar compartment and the incoming cable in the connection compartment could remain in operation. With a cubicletype design, the incoming cable had to be isolated, but the busbar itself could remain in operation.

Overview of IEC 62271-200

Siemens HV Switchgear

Although the old IEC 60298 standard was very helpful, in time it was superseded by the technological progress. Above all, the appearance of maintenance- free vacuum circuit-breakers, with operating cycles far exceeding the normal number, made frequent access to this circuit-breaker no longer of prime importance.

The vacuum arc-quenching principle is technologically so superior to other arc-quenching principles that the circuit-breaker can be fixed-mounted again. This resulted in the first-time use of gas insulation with the important features of climatic independence, compactness and maintenance-free design. However, both technologies – the vacuum arc-quenching principle and gas insulation – were not adequately taken into account in the existing standard. Therefore, at the end of the nineties, the responsible IEC committees decided on the reformulation of the switchgear standard, which finally came into effect as IEC 62271-200 in November 2003. At the same time the old IEC 60298 standard was withdrawn without any transition period.

Four key features are of special note with the new IEC 62271-200 standard:

1. Changed dielectric requirements

According to IEC 60298, two disruptive discharges were permitted in a series of 15 voltage impulses for the test with rated lightning impulse withstand voltage. According to the new standard, the series must be extended by another fi ve voltage impulses if a disruptive discharge has occurred during the fi rst 15 impulses. This can lead to a maximum of 25 voltage impulses, whereas the maximum number of permissible disruptive discharges is still two.

2. Increased demands on the circuit breaker and earthing switch

In contrast to the previous standard, the switching capacity test of both switching devices is no longer carried out as a pure device test. Instead, it is now mandatory to carry out the test in the corresponding switchgear panel. The switching capacity may get a negative infl uence from the different arrangement of the switchgear with contact arms, moving contacts, conductor bars, etc.

For this reason, the test duties T100s and T100a from the IEC 62271-100 standard are stipulated for the test of the circuitbreaker inside the switchgear panel.

3. New partition classification

The new partition classes PM (partitions metallic = partitions and shutters made of metal) or PI (partitions nonmetallic = partitions and shutters made of insulating material) now apply with respect to the protection against electric shock during access to the individual components.

The assignment is no longer according to the constructional description (metalclad, compartmented or cubicle-type design), but according to operator-related criteria.

4. Stricter internal arc classification

Significantly stricter changes have also been implemented here. The energy flow direction of the arc supply, the maximum number of permissible panels with the test in the end panel and the dependency of the ceiling height on the respective panel height have been redefined.

In addition, the five following new criteria must always be completely fulfilled (no exceptions are permitted):

1. Covers and doors remain closed. Limited deformations are accepted.
2. No fragmentation of the enclosure, no projection of small parts above 60 g weight.
3. No holes in the accessible sides up to a height of 2 meters.
4. Horizontal and vertical indicators do not ignite due to the effect of hot gases.
5. The enclosure remains connected to its earthing parts.

For the internal arc classifi cation of substations with and without control aisle, the testing of the substation with installed switchgear is mandatory in the new IEC 62271-202 standard. The classification of the substation is only valid in combination with the switchgear used for the test.

The classification cannot be transferred to a combination with another switchgear type as each switchgear behaves differently in the case of an internal arc (pressure relief equipment with different cross-sections and pickup pressures, different arcing conditions because of different conductor geometries).