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next working day delivery on orders over £50 (inc VAT)
MCCBs - Moulded Case Circuit Breakers
MCCB
What is an MCCB?
An MCCB (Moulded Case Circuit Breaker) is a type of circuit protection device designed to safeguard electrical circuits against overloads and short circuits.
It consists of a moulded case housing the internal components, including the trip mechanism and contacts.
How Does an MCCB Work?
MCCBs automatically disconnect the electrical circuit when it experiences an overload or short circuit.
The internal trip mechanism detects abnormal currents and triggers the MCCB to trip, interrupting the flow of electricity and preventing damage to the circuit.
What is the Difference Between MCB and MCCB?
While both MCBs (Miniature Circuit Breakers) and MCCBs provide circuit protection, they mainly differ in terms of capacity.
MCBs are designed for low-voltage circuits with lower current ratings, typically used in residential and light commercial installations.
On the other hand, MCCBs are suitable for higher current ratings and are usually found in industrial and commercial settings.
What is the Difference Between MCCB and RCCB?
MCCBs and RCCBs (Residual Current Circuit Breakers) serve different functions in electrical systems.
While MCCBs protect against overloads and short circuits, RCCBs are specifically designed to detect and disconnect circuits in the event of a residual current fault, such as an earth leakage.
When Should You Use an MCCB?
MCCBs are ideal where reliable protection is needed against overloads and short circuits.
They’re commonly deployed in industrial plants, commercial buildings, data centres, and vital infrastructure to ensure the safety of electrical systems.
Why is My MCCB Tripping?
MCCBs may trip due to various reasons, including overload conditions, short circuits, or faults within the electrical system.
Overloading occurs when the current exceeds the MCCB's rated capacity for an extended period, while short circuits result from a direct connection between live conductors.
Regular maintenance and inspection of electrical systems can help identify issues causing an MCCB to trip.
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£0.79 ex VATOriginal price £4.26Original price £4.26 - Original price £4.26Original price £4.26Current price £0.95 inc VAT£0.95 - £0.95Current price £0.95 inc VAT
Crabtree 17T2B Blanking Plate TP MCCB
CrabtreeIn stock£0.79 ex VATOriginal price £4.26Original price £4.26 - Original price £4.26Original price £4.26Current price £0.95 inc VAT£0.95 - £0.95Current price £0.95 inc VATSave 78% -
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Crabtree 7PBVS3200 200A 36kA 3P 7PBV MCCB ATFM with Box Terminals (Adjustable Thermal & Fixed Magnetic Elements)
CrabtreeOut of stockAdjustable Thermal & Fixed Magnetic Elements • 36kA @ 415V AC to BS EN 60947-2 • Fitted with box terminals on line and load sides. Other term...
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£5.71 ex VATOriginal price £30.85Original price £30.85 - Original price £30.85Original price £30.85Current price £6.85 inc VAT£6.85 - £6.85Current price £6.85 inc VAT
Crabtree 7PBGGN115 15A 25kA 1P NGG MCCB FTFM c/w Box Terminals
CrabtreeOut of stockCrabtree Powerstar 250 Moulded Case Circuit Breaker is certified to IEC/EN 60947-2 standards. Powerstar GG frame breaker is a compact, robust desig...
View full details£5.71 ex VATOriginal price £30.85Original price £30.85 - Original price £30.85Original price £30.85Current price £6.85 inc VAT£6.85 - £6.85Current price £6.85 inc VATSold out -
£5.06 ex VATOriginal price £35.60Original price £35.60 - Original price £35.60Original price £35.60Current price £6.07 inc VAT£6.07 - £6.07Current price £6.07 inc VAT
Crabtree 7PBGGN1100 100A 25kA 1P NGG MCCB FTFM c/w Box Terminals
CrabtreeIn stockFixed Thermal & Magnetic Elements • 25kA @ 240V AC to BS EN 60947-2 • Fitted with box terminals on line and load sides • For use in Powersta...
View full details£5.06 ex VATOriginal price £35.60Original price £35.60 - Original price £35.60Original price £35.60Current price £6.07 inc VAT£6.07 - £6.07Current price £6.07 inc VATSave 83%
MCCB
What is an MCCB?
An MCCB (Moulded Case Circuit Breaker) is a type of circuit protection device designed to safeguard electrical circuits against overloads and short circuits.
It consists of a moulded case housing the internal components, including the trip mechanism and contacts.
How Does an MCCB Work?
MCCBs automatically disconnect the electrical circuit when it experiences an overload or short circuit.
The internal trip mechanism detects abnormal currents and triggers the MCCB to trip, interrupting the flow of electricity and preventing damage to the circuit.
What is the Difference Between MCB and MCCB?
While both MCBs (Miniature Circuit Breakers) and MCCBs provide circuit protection, they mainly differ in terms of capacity.
MCBs are designed for low-voltage circuits with lower current ratings, typically used in residential and light commercial installations.
On the other hand, MCCBs are suitable for higher current ratings and are usually found in industrial and commercial settings.
What is the Difference Between MCCB and RCCB?
MCCBs and RCCBs (Residual Current Circuit Breakers) serve different functions in electrical systems.
While MCCBs protect against overloads and short circuits, RCCBs are specifically designed to detect and disconnect circuits in the event of a residual current fault, such as an earth leakage.
When Should You Use an MCCB?
MCCBs are ideal where reliable protection is needed against overloads and short circuits.
They’re commonly deployed in industrial plants, commercial buildings, data centres, and vital infrastructure to ensure the safety of electrical systems.
Why is My MCCB Tripping?
MCCBs may trip due to various reasons, including overload conditions, short circuits, or faults within the electrical system.
Overloading occurs when the current exceeds the MCCB's rated capacity for an extended period, while short circuits result from a direct connection between live conductors.
Regular maintenance and inspection of electrical systems can help identify issues causing an MCCB to trip.
