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StarbreakerProtective Devices

227779 B2430 Crabtree Protective Devices 8pp (Q16).qxp 12/06/2018 13:14

Designers & installers should ensure that installations are arranged so that therisk of ignition from high temperatures or electric arc is minimised, and thatprotection from harmful thermal effects is provided. Protection requirementsinclude protecting against fire caused by insulation faults, arcs & sparks & hightemperatures (1).

Installing arc fault detection devices is recognised as a means of mitigating therisk from fire in final AC circuits due to arc faults.

The wiring regulations permit the use of RCDs as a measure for protectionagainst insulation faults, & require the use of other circuit protection devices,such as MCBs, to provide protection to the wiring system from overcurrentconditions, but those devices cannot detect or disconnect all arc faults. AFDDsdetect arc faults that will not be detected by RCDs or MCBs. Serial arcs can notbe detected by MCBs or RCDs and the magnitude of parallel arc faults may beinsufficient to operate an MCB or RCD.

In order to provide for all of the above requirements Crabtree AFDDs arecombined with Miniature RCBOs as a single protective device that includesovercurrent protection, short circuit / fault protection, earth leakage protection,and arc fault protection, with two pole isolation as standard.

ARC FAULT DETECTIONDEVICES (AFDDs)The wiring regulations (BS7671) sets out requirements forelectrical installations in the UK, including requirements forprotection of persons, livestock & property against the risk fromfires that may be generated & propagated in electricalinstallations.

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(1) Requirements of BS7671 can be found in Chapters 13 (Protection For Safety) and Chapter 42(Protection Against Thermal Effects) other chapters may also be applicable. Readers should refer toBS7671 for full details.


Government statistics show a high number of incidents where the source of ignition is recorded as electricaldistribution or electrical appliance, these two categories amount to more than 13,000 fires in total (2).

Arc Fault Detection Devices (AFDDs) have been proven to reduce the number of incidents of electrical fires incountries where these devices are already used. AFDDs detect & automatically disconnect arc faults that occur indamaged or crushed cables, in loose terminations, and in ageing installations where the insulation quality degradesover time.

Arc faults cause overheating and the temperatures that are generated from such overheating can be high enoughto ignite flammable materials and cause fires. AFDDs monitor the condition of a circuit for unusual conditions thatare indicative of a series or parallel arc. These arc fault conditions can occur in electrical installation circuits and incords & leads and equipment connected to those circuits. AFDDs detect arc fault conditions & automaticallydisconnect the power to the circuit with an arc fault.

3(2) Government statistics for England, fire statistics tables, excludes Wales & Scotland data sets

Faulty appliancesSource of Ignition and leadsCooking appliances 485Cooker incl. oven 216Deep fat fryer 7Grill/Toaster 125Microwave oven 95Other cooking appliance 16Ring/hot plate (separate appliance) 26Space heating appliances 125Heater/Fire 79Other heating equipment 46Central and water heating appliances 116Central heating/Hot water 83Separate water heating 33Electrical distribution 965Apparatus - batteries, generators 204Wiring, cabling, plugs 748Heating equipment - Power Source 13Electric lighting 144Fairy lights 5Fluorescent lights 42Spot lights 35Other incandescent light bulbs 19Other lights 43Office equipment 11Personal Computer 5Copiers/ Printers 3Other computer equipment 1Telephone/Answering machine/Fax machine 2Other domestic style appliance 2007

Faulty appliancesSource of Ignition and leadsAudio equipment 8Battery charger 52Dishwasher 268Electric blanket 31Electric kettle 21Extractor fan 130Fridge/Freezer 177Hair dryer 11Iron 9PC equipment (domestic use) 41Spin dryer 23Trouser press 1Tumble dryer 528Vacuum cleaner 14TV 39Video/DVD 2Other electrical visual equipment 11Washing machine 501Washer/Dryer combined 55Other domestic style appliance 85Other Sources 187Food warming equipment (not cooking) 1Industrial dryer 7Industrial lift 3Other industrial equipment 2Other appliance or equipment 72Domestic style gardening appliance 2Other 97Unspecified 71

DWELLINGS / ELECTRIC FAULTY APPLIANCES AND LEADS RESULTED IN A TOTALOF 4,111 FIRES BEING STARTED (2)

SOURCE OF IGNITION (2)

Year Total Electrical distribution Other electrical appliances 2014/15 71,116 7,812 5,834 2015/16 73,477 7,719 5,634 2016/17 74,803 7,822 5,525

Fire Statistics Table 0602a: Primary fires1 by source of ignition, England


Serial arcing faults:These are typically caused by a loose connection or adamaged conductor. In this arc fault condition currentflow is always lower than the operational load current.Miniature Circuit Breakers and Residual Current protectivedevices will not detect these electrical faults.

Parallel arcing faults between conductors:These are caused by electric arcs resulting from damageto the insulation that permits minimal contact between thetwo live conductors. MCBs or RCBOs may trip if the faultcurrent is high enough. However AFDDs are extremelysensitive and will disconnect parallel arcing faults whereMCB and RCBO shutdown conditions are not reached.

Parallel arcing faults between phase or neutral / protective conductor:AFDDs will detect arcing faults against the protectiveconductor and provide adequate fire protection where noRCD is used. However Starbreaker AFDDs are combinedwith 30mA Miniature RCBOs that reliably detect and shutdown this type of parallel arc fault.

AFDD with Miniature RCBO provides the highestlevels of protection for the installation and its users.

Arc fault detection devices offer extremely effective protectionagainst fires that are caused by electrical faults. Typically causesinclude loose connections, damaged cables, crushed cables orwhere aged insulation allows current to leak between conductors.

AFDDs detect electrical arcing faults that MCBs, RCDs andRCBOs cannot detect.

Types of Arc Fault:

ARC FAULT DETECTIONDEVICES (AFDDs)

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Damaged conductor

Crushed cable

Aged or failing insulation

Serial arc fault


STARBREAKER ARC FAULT DETECTION DEVICES

COMBINED RCBO AFDD

B CurveRating RCD Rating Poles Modules List No.6A 30mA 2 2 61/BM06AFD10A 30mA 2 2 61/BM10AFD16A 30mA 2 2 61/BM16AFD20A 30mA 2 2 61/BM20AFD25A 30mA 2 2 61/BM25AFD32A 30mA 2 2 61/BM32AFD40A 30mA 2 2 61/BM40AFD

C CurveRating RCD Rating Poles Modules List No.6A 30mA 2 2 61/CM06AFD10A 30mA 2 2 61/CM10AFD16A 30mA 2 2 61/CM16AFD20A 30mA 2 2 61/CM20AFD25A 30mA 2 2 61/CM25AFD32A 30mA 2 2 61/CM32AFD40A 30mA 2 2 61/CM40AFD

Starbreaker arc fault detection devices are only available combined withMiniature RCBOs and so provide the highest levels of protection applied per circuit.

MAIN SWITCH CONSUMER UNITS

MS Enclosure Total Combined MetalRating Modular Width AFDD / RCBO Ways List No.40A 4m 1 502/2B63A 4m 1 502/26B100A 6m 2 504/2B100A 9m 3 507/2B100A 12m 5 510/2B100A 15m 6 513/2B100A 20m 9 518/2B

Dual bank consumer units having overall height of 506mm and 12, 15 & 20module width are available upon request.

Starbreaker combined RCBO & AFDD devices are suitable for use with thestandard plug in busbar.

Existing installed insulated and metal consumer units will readily accept thenew combined RCBO / AFDD.

Main switch split load or high integrity units can accept these combinedRCBO / AFDD devices.

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518/2B


The wiring regulations (BS 7671) sets out requirements forelectrical installations in the UK, including requirements foradditional protection by 30mA RCD.

Designers and installers should ensure that installations are arranged so that socket outlets, circuits in orpassing through a room with fixed bath or shower, cables concealed in walls and partitions, lighting circuitsetc are each protected by a 30mA RCD and each installation should be divided into the number of circuits asnecessary to avoid unwanted tripping of RCDs (1).

Starbreaker miniature RCBOs bring higher levels of safety to an electrical installation and its users becausethey include switched neutral as standard and bring cost savings by reducing installation and testing times.

CRABTREE MINIATURERCBOs - WITH SWITCHEDNEUTRAL AS STANDARD

Safer installations means safer homesStarbreaker Miniature RCBOs with switched neutralbuilt in as standard will fully isolate a faulty ordamaged circuit by disconnecting live and neutralconductors.

Using Starbreaker Miniature RCBOs will guaranteethat healthy circuits remain in service and that only afaulty circuit is switched off. This avoids danger andprevents inconvenience in the event of a fault (asrequired by regulation 314.1)* (2).

Miniature RCBOs take up less space in theconsumer unit and so provide more wiring space forthe installer, making the installation process easierand quicker.

Starbreaker RCBOs go one step further, they haveswitched neutral built in as standard, live and neutralconductors do not have to be disconnected forinsulation resistance testing. This saves time andmoney, particularly for responsible landlords whoregularly test installations during occupancy voids.

* BS 7671 IET Wiring Regulations(1) & (2) Requirements of BS7671 can be found in Chapters 31, 41,52 and 53, other Chapters may also be applicable

ACTUAL SIZE6


MINIATURE CIRCUIT BREAKERS (6kA)

CURRENTB CURVE C CURVE RATING POLES MODULES

61/B06 61/C06 6A 1 161/B10 61/C10 10A 1 161/B16 61/C16 16A 1 161/B20 61/C20 20A 1 161/B32 61/C32 32A 1 161/B40 61/C40 40A 1 161/B50 61/C50 50A 1 1

Not suitable for use in conjunction with AFDD

MINIATURE RCBO 6kA (MCB sized 1 module with switched neutral)

CURRENT RCD B CURVE C CURVE RATING RATING POLES MODULES

61/BM0630 61/CM0630 6A 30mA 2 161/BM1030 61/CM1030 10A 30mA 2 161/BM1630 61/CM1630 16A 30mA 2 161/BM2030 61/CM2030 20A 30mA 2 161/BM2530 - 25A 30mA 2 161/BM3230 61/CM3230 32A 30mA 2 161/BM4030 61/CM4030 40A 30mA 2 1

Type A - Pure AC and pulsating DC sensitivity

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STARBREAKER MINIATURE RCBOs & CIRCUIT BREAKERS


MODEL AFDD & RCBO RCBO MCB Product brand name Starbreaker Starbreaker Starbreaker Product designation AFDD and RCBO RCD operated circuit breaker Miniature circuit breaker Product standard BS EN 62606 & IEC 61009-1 IEC 61009-1 BS EN 61008GENERAL TECHNICAL DATA Number of poles 2 2 1 Number of poles / switched 1P+N 1P+N 1P Number of poles / with protection (overcurrent) 1 1 1 Tripping characteristics class B or C B or C B or C RCD type A A - Mechanical service life (switching cycles) / typical 10,000 10,000 - Overvoltage category III III 3PRODUCT FUNCTION Product function / neutral conductor switching Yes Yes N/AVOLTAGE Surge current resistance / at (8/20) µs 1kA 1kA N/ASUPPLY VOLTAGE • at AC / rated value 240V 240V 250V • for testing equipment / minimum 195V 195V - Supply voltage frequency / rated value 50Hz 50Hz 50HzPROTECTION CLASS Protection class IP IP20 IP20 IP20 Energy limiting class 3 3 3SWITCHING CAPACITY CURRENT • acc. to EN 60898 / rated value 6kA 6kA 6kADISSIPATION Power loss (W) • maximum 2.6W 2.6W 2.6WELECTRICITY Tripping residual current / rated value 30mA 30mA N/A Current / at AC / rated value 6A - 40A 6A - 40A 6A - 50ACONNECTIONS Connectable conductor cross-section / stranded • minimum 0.75mm2 0.75mm2 0.75mm2

• maximum 16mm2 16mm2 25mm2

Connectable conductor cross-section • solid - minimum 0.75mm2 0.75mm2 0.75mm2

• solid - maximum 16mm2 16mm2 25mm2

• fine strand / with core end processing - minimum 0.75mm2 0.75mm2 0.75mm2

TIGHTENING TORQUE / WITH SCREW-TYPE TERMINALS Load terminal • minimum 1.2Nm 1.2Nm 2.3Nm • maximum 2.0Nm 2.0Nm 3.0NmMECHANICAL DESIGN Height x Width x Depth 90mm x 36mm x 77mm 90mm x 18mm x 77mm 90mm x 18mm x 77mm Mounting position DIN DIN DIN Installation depth 70mm 70mm 70mm Number of width units 2 1 1 Connection Plug in Plug in Plug inENVIRONMENTAL CONDITIONS Degree of pollution 2 2 2 Influence of the surrounding temperature Maximum 95% humidity Maximum 95% humidity Maximum 95% humidity Ambient Temperature • minimum -25ºC -25ºC -25ºC • maximum 55ºC 55ºC 45ºC • during storage / minimum -40ºC -40ºC -40ºC • during storage / maximum 75ºC 75ºC 75ºC

Although every effort has been made to ensure accuracy in the compilation of the technical detail within this publication,specifications and performance data are constantly changing. Latest details can be obtained from Crabtree.

Publication No. B2430 6/18Printed in England.

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ELECTRIUM SALES LIMITED A SIEMENS COMPANYCommercial Centre, Lakeside Plaza,Walkmill Lane, Bridgtown,Cannock WS11 0XE.eMail: [email protected]

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