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CBT-94F Core Balanced Current Transformers

CBT-94F core Balanced Current Transformers10 The CBT-94F series of core Balanced Current Transformers are exclusively for usewith our 373-ELR earth leakage protection relay. The extremely sensitive toroidalcore and secondary winding are encapsulated by a self extinguishing case providingexcellent mechanical strength, protection from damage, and electrical Current devices are used to detect potentially dangerous earth fault currentsbefore damage is caused. An undetected fault Current may lead to cables overheating,which could start a fire. If high fault currents are involved, hazardous voltages mayalso appear on earthed equipment, putting lives at risk. An earth leakage protectionrelay is intended to provide a high degree of protection and monitoring for anyelectrical equipment, specifically motors and their control gear, generator sets andtransformers.

CBT-94F Core Balanced Current Transformers 10 The CBT-94F series of core balanced current transformers are exclusively for use with our 373-ELR earth leakage

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  Earth, Current, Core, Balanced, Leakage, Transformers, 94f core balanced current transformers, Core balanced current transformers, Elr earth leakage

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Transcription of CBT-94F Core Balanced Current Transformers

1 CBT-94F core Balanced Current Transformers10 The CBT-94F series of core Balanced Current Transformers are exclusively for usewith our 373-ELR earth leakage protection relay. The extremely sensitive toroidalcore and secondary winding are encapsulated by a self extinguishing case providingexcellent mechanical strength, protection from damage, and electrical Current devices are used to detect potentially dangerous earth fault currentsbefore damage is caused. An undetected fault Current may lead to cables overheating,which could start a fire. If high fault currents are involved, hazardous voltages mayalso appear on earthed equipment, putting lives at risk. An earth leakage protectionrelay is intended to provide a high degree of protection and monitoring for anyelectrical equipment, specifically motors and their control gear, generator sets andtransformers.

2 The leakage Current is determined by passing the phase conductors(and neutral if present) through a core Balanced Current conductors should be grouped together and fed through the currenttransformer aperture. It is essential that each conductor passes through the device inthe same direction. Each phase conductor (and neutral if present) must pass throughthe Current transformer. The Current Transformers sum the currents flowing into andback from the load. Ideally, the load will have no leakage Current , so Current flowthrough the CT will completely cancel out. For example, 100 Amps flowing into loadand 97 Amps flowing back provides an output of 3 equipment grounding conductor must always bypass the Current connections between the Current transformer and protector should be kept asshort as possible to minimise signal noise.

3 For best results, use screened cable, withthe screen grounded at the Voltage720V maximumTest Voltage3kV AC for 1 minuteSystem Frequency50Hz or 60 HzPrimary RatingsFrom 30mA to 10 ASecondary TerminalsProtected to IP20 Operating Temperature 10 C to +50 CEnclosureUL94V0 flame retardant plasticCompliant WithIEC185, VDE 0414 Mounting HardwareSteel mounting feet for wall or base mountingProduct Codes and DimensionsApertureDim E Dim A Dim B Dim C Dim DCatalogue CBT-94F -300 FeaturesLeakage measurement range 0-10 Amps6 models availableIntegral wire sealable terminal coverFlame retardant high impact mouldedcaseBenefitsReduction of high currents for ease ofmeteringWide operating temperature 10 C to+50 CSteel mounting feet suppliedLong product lifeApplicationsSwitchgearDistribution systemsGenerator setsControl panelsMotor protectionTransformer protectionOverload protectionApprovalsIEC 185 VDE 0414A EB33DC46


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