Molded Case Circuit Breakers - Page 24 | Raptor Supplies Australia

Molded Case Circuit Breakers

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Molded case circuit breakers protect various electrical circuits and equipment from overcurrents and short circuits. These breakers consist of a molded case housing that encloses the circuit... Read More

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Molded Case Circuit Breakers, QJA Series

Square D QJA Series circuit breakers are designed for installation in commercial and industrial electrical devices for protection against overcurrent and short circuit conditions. They feature long-time and instantaneous current limiting trip functions for reacting against severe power surges at once while avoiding tripping on mild overloads. These circuit breakers feature a maximum interrupting capacity of 100kA at 240V and come equipped with a compact QJA type frame for ease-of-installation in constrained panelboards. The load & line side lug terminals enable hassle-free wiring. QJA Series circuit breakers are available in current ratings between 100A & 225A on Raptor Supplies.

StyleModelAmpsVoltagePrice (inc. GST)
AQJA32100100A240VA$ 6982.55
AQJA32125125A240VA$ 10099.58
AQJA32150150A240VA$ 10099.58
AQJA32175175A240VA$ 10099.58
BQJA222002200240-
RFQ
BQJA222004200240-
RFQ
CQJA222001200A240V-
RFQ
AQJA32200200A240VA$ 10099.58
AQJA32225225A240VA$ 10099.58
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Molded Case Circuit Breakers, QJL Series

Square D QJL Series circuit breakers are designed for installation in commercial and industrial electrical devices for protection against overcurrent and short circuit conditions. These units feature a thermal magnetic trip unit to provide both instantaneous and long-time current limiting protection. They come in a molded case which holds current-carrying components, trip devices and other mechanisms in a compact space. They deliver an interrupting capacity of 60kA / 100kA at 240V, with a maximum current rating of 225A. These circuit breakers are UL 489 listed, as well as CSA, ANCE and IEC certified. They come equipped with field-installable handle padlock for locking in On / Off position and are compatible with mechanical interlocks. Choose from a wide range of Square D QJL Series circuit breakers, available in 2 & 3 pole configurations on Raptor Supplies.

StyleModelAic RatingAmpsFrame TypeNumber Of PolesVoltagePrice (inc. GST)
AQJL32250-250QJL3240A$ 4688.86
AQJL32175-175QJL3240A$ 4341.98
BQJL22250-250QJL2240-
RFQ
BQJL22175-175QJL2240A$ 4065.35
CQGL3222565kAIC@240V225AQGL3240VA$ 3268.60
DQJL22150100kAIC@240V150AQJL2240V-
RFQ
DQJL22200100kAIC@240V200AQJL2240V-
RFQ
DQJL22225100kAIC@240V225AQJL2240VA$ 3268.60
EQJL32100100kAIC@240V100AQJL3240V-
RFQ
EQJL32125100kAIC@240V125AQJL3240VA$ 4341.98
EQJL32200100kAIC@240V200AQJL3240VA$ 4341.98
DQJL22100100kAIC@240V100AQJL2240VA$ 4065.35
DQJL22125100kAIC@240V125AQJL2240V-
RFQ
EQJL32150100kAIC@240V150AQJL3240VA$ 4341.98
EQJL32225100kAIC@240V225AQJL3240VA$ 4341.98
GENERAL ELECTRIC -

Circuit Breakers: SEHA Series

General Electric SEHA Series circuit breakers are designed to shut-off a power supply when an imbalance between the outgoing and incoming current occurs. They are calibrated at an ambient temperature of 40 degrees C and feature an interchangeable RMS trip unit which provides long-time, short-time and instantaneous trip functions for maximum protection against faulty currents. They come with bolt-on mounting facility for fast installation and are suitable for reverse feed applications. GE power circuit breakers are available in an AC voltage rating of 600VAC on Raptor Supplies.

StyleModelAmpsPrice (inc. GST)
ASEHA24AT003030AA$ 1473.80
RFQ
ASEHA24AT006060AA$ 1762.58
RFQ
ASEHA24AT0100100AA$ 2336.67
RFQ
ASEHA24AT0150150AA$ 2819.27
RFQ
GENERAL ELECTRIC -

Circuit Breakers: SELA Series

StyleModelAmpsNumber Of PolesPrice (inc. GST)
ASELA24AT003030A2A$ 1762.58
RFQ
ASELA36AT003030A3A$ 1920.20
RFQ
ASELA24AT006060A2A$ 1762.58
RFQ
GENERAL ELECTRIC -

SGHA Series Circuit Breakers

General Electric SGHA Series circuit breakers are ideal for use with electrical control panels and switchboards for protecting electrical circuits against current overloads and short circuits. These UL-listed molded case circuit breakers feature an RMS trip unit with instantaneous, short time & long time current limiting functions for reacting against severe power surges while avoiding tripping on mild overloads. They are further integrated with a bolt-on mounting design for ease-of-installation and lug terminals for hassle-free wiring. Choose from a broad range of these double- / triple-pole circuit breakers available in amperage ratings ranging from 400 to 600A on Raptor Supplies.

StyleModelAmpsPrice (inc. GST)
ASGHA26AT0400400AA$ 3513.70
RFQ
ASGHA26AT0600600A-
RFQ
GENERAL ELECTRIC -

Circuit Breaker: SGLA Series

StyleModelAmps
ASGLA36AI0400400A
RFQ
ASGLA36AI0600600A
RFQ
GENERAL ELECTRIC -

Spectra Circuit Breakers, SKLA

General Electric Spectra Series moulded case circuit breakers are suitable for reverse feed applications and protection against short circuits & overloads. Spectra SKLA cricuit breakers feature a solid-state trip system & front-mounted plugs to change the breaker current ratings and a bolt-on mounting design for easy installation in both horizontal & vertical orientations. The breakers are equipped with an interchangeable RMS trip unit for providing instantaneous, long-time and short-time trip functions and use digital sampling to find the RMS value of sinusoidal & non-sinusoidal currents. They can accommodate aluminium wires of sizes up to 500 kcmil. SKLA breakers are available in 800A and 1200A current ratings on Raptor Supplies.

StyleModelAmpsPrice (inc. GST)
ASKLA36AI0800800A-
RFQ
ASKLA36AI12001200AA$ 15121.19
RFQ
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Molded Case Circuit Breakers: FY Series

Square D FY Series molded case circuit breakers are ideal for protection of panelboards and loadcentres from short-circuiting and current overloading. These UL-listed devices feature I-Line style plug-in design for easy installation and a thermal-magnetic trip for providing both time-delayed and instantaneous current limiting functions. These single pole circuit breakers are designed to withstand an ambient temperature of 40 degrees C and are available in amperage ratings ranging from 15 to 30A on Raptor Supplies.

StyleModel
AFY12020B
RFQ
AFY12020A
RFQ
ABB -

T1 Series Circuit Breakers

ABB T1 Series circuit breakers protect downstream components from short circuit or overload conditions in power distribution systems. These units feature a non-interchangeable, thermal-magnetic trip providing both instantaneous and long-time tripping functions for maximum current limiting protection. They come integrated with feed-thru connection for easy installation in both vertical & horizontal orientations, ideal for panelboards and switchboards. Choose from a vast range of Tmax Series circuit breakers in current ratings ranging from 20 to 100 A on Raptor Supplies.

StyleModelAmpsPrice (inc. GST)
AT1N020TL20AA$ 554.79
RFQ
AT1N025TL25AA$ 720.81
RFQ
AT1N030TL30AA$ 773.28
RFQ
AT1N040TL40AA$ 743.04
RFQ
AT1N050TL50A-
RFQ
AT1N070TL70AA$ 2210.09
RFQ
AT1N080TL80AA$ 1169.72
RFQ
AT1N090TL90AA$ 651.36
RFQ
AT1N100TL100AA$ 843.21
RFQ
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MJA Series Molded Case Circuit Breakers

Square D MJA Series moulded case circuit breakers are used in commercial facilities, industrial plants, data centres and institutional buildings for reliable protection against overcurrents and short circuits in electrical systems. They have a -pole, 3-phase configuration with bolt-on terminal design for enhanced safety and secure connection. These standard circuit breakers feature an electronic trip for LSI (Long-time, Short-time and Instantaneous) trip functions. They offer current ratings ranging from 300A to 800A. These breaker units are further equipped with line and load side lug terminals to accommodate copper / aluminium wires of sizes ranging from 500 Kcmil to 3 AWG.

StyleModelAmpsPrice (inc. GST)
AMJA36300300A$ 16750.50
AMJA36350350A$ 21929.84
AMJA36400400A$ 16750.50
AMJA36450450A$ 17625.52
AMJA36500500A$ 16750.50
AMJA36600600A$ 16750.50
BMJA36700700A$ 17625.52
AMJA36800800A$ 17625.52
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Circuit Breakers: QDL Series

Square D QDL Series circuit breakers come in a PowerPact Q frame for overcurrent protection and switching On AC systems. These circuit breakers feature an over-centre toggle mechanism with a trip-free action for quick make and break operation. The integral push-to-trip button in the cover enables the user to manually trip the breaker. These breakers are built in accordance with UL Standard 489 and NEMA Standard AB-1-1999. They feature a thermal-magnetic trip mechanism that overrides mild current while instantly responding to heavy fluctuations. Raptor Supplies offers a huge variety of these circuit breakers in 2 and 3 pole configurations.

StyleModelAmpsHeightNumber Of PolesPhaseWidthPrice (inc. GST)
AQDL22070706.47"213"A$ 1728.39
BQDL32070706.47"334.5"A$ 2436.58
BQDL32080806.47"334.5"A$ 2436.58
AQDL22080806.47"213"A$ 1728.39
BQDL32090906.47"334.5"A$ 2436.58
AQDL221001006.47"213"A$ 1433.33
BQDL321101106.47"334.5"A$ 2436.58
AQDL221101106.47"213"A$ 2521.45
AQDL221251256.47"213"A$ 1433.33
BQDL321251256.47"334.5"A$ 2326.79
AQDL221501506.47"213"A$ 1433.33
BQDL321501506.5"334.5"A$ 2326.79
AQDL221751756.47"213"A$ 1433.33
BQDL321751756.47"334.5"A$ 2326.79
AQDL222002006.47"213"A$ 1433.33
BQDL322002006.47"334.5"A$ 2326.79
AQDL222252256.47"213"A$ 1527.90
BQDL322252256.47"334.5"A$ 2326.79
BQDL322502506.47"334.5"A$ 3268.60
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QBL Series Circuit Breakers

Square D QBL Series circuit breakers feature a PowerPact Q frame for overcurrent protection and switching On AC systems. These circuit breakers feature a thermal-magnetic trip mechanism that overrides mild currents while instantly responding to heavy fluctuations. They are built in accordance with UL Standard 489 and NEMA Standard AB-1-1999. These circuit breakers feature an over-centre toggle mechanism with a trip-free action to provide quick make and break operation. The integral push-to-trip button in the cover enables the user to manually trip the circuit breaker. Raptor Supplies offers a huge variety of these circuit breakers in 2 and 3 pole configurations.

StyleModelAmpsDepthNumber Of PolesPhaseVoltageWidthPrice (inc. GST)
AQBL3207070-3-240-A$ 1937.29
BQBL2207070A-2-240V-A$ 940.18
BQBL2208080A-2-240V-A$ 818.90
CQBL3208080A-3-240V-A$ 1937.29
BQBL2209090A-2-240V-A$ 940.18
CQBL3209090A-3-240V-A$ 1937.29
AQBL32100100-3-240-A$ 1937.29
BQBL22100100A-2-240V-A$ 757.46
CQBL32110110A-3-240V-A$ 1937.29
BQBL22110110A-2-240V-A$ 1039.16
CQBL321251253.93"33-4.5"A$ 1861.56
BQBL221251253.9"21-3"A$ 818.90
BQBL221501503.9"21-3"A$ 818.90
CQBL321501503.93"33-4.5"A$ 1861.56
CQBL321751753.93"33-4.5"A$ 1861.56
BQBL221751753.9"21-3"A$ 757.46
CQBL322002003.93"33-4.5"A$ 1861.56
BQBL222002003.9"21-3"A$ 757.46
CQBL322252253.93"33-4.5"A$ 1861.56
BQBL222252253.9"21-3"A$ 818.90
DQBL22250250-2-240-A$ 1159.24
CQBL32250250A-3-240V-A$ 2567.08
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Q4 Series Circuit Breakers

Square D Q4 Series circuit breakers protect sensitive circuits from excessive current flows causing overloads or short circuits. These circuit breakers feature an over-centre toggle mechanism to provide quick make and break operation with positive handle indication. The thermal-magnetic trip elements are calibrated at an ambient temperature of 40 degrees Celsius to provide uniform tripping. They come with a push-to-trip button that enables the user to manually trip the circuit breaker and perform maintenance checks. Raptor Supplies offers a huge variety of these Q4 Series circuit breakers that can be mounted in any position.

StyleModelAmpsPrice (inc. GST)
AQ4L3250250A$ 4199.33
BQ432250250AA$ 6648.76
CQ4L3300300A$ 6982.55
DQ432300300AA$ 6648.76
EQ4L3350350A$ 8822.76
BQ432350350AA$ 6648.76
FQ4L3400400A$ 6982.55
GQ432400400A-
RFQ
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PJL Series Molded Case Circuit Breakers

Square D PJL Series circuit breakers are used for protecting electrical equipment from current overload and short-circuit conditions. These circuit breakers feature a programmable electronic trip for short-time, long-time & instantaneous tripping and are equipped with line & load side lug terminals to accommodate wires (copper / aluminium) of sizes ranging between 500 kcmil & 3 AWG. These UL listed circuit breakers provide current ratings up to 1200A and deliver interrupt capacity of 100kA at 240VAC, 65kA at 480VAC and 25kA at 600VAC.

StyleModelAmpsVoltagePrice (inc. GST)
APJL36080CU31A800600-
RFQ
APJL36080U31A800600-
RFQ
APJL36100CU41A1000600-
RFQ
BPJL36100AA1000600-
RFQ
APJL36100U41A1000600A$ 34563.32
CPJL361001000-A$ 27934.70
CPJL36100U44A1000A600VA$ 22881.80
BPJL36000S121200600-
RFQ
APJL36120CU41A1200600-
RFQ
DPJL36120U41A1200A600VA$ 34563.32
CPJL36120U44A1200A600VA$ 38470.55
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PGL Series, Circuit Breaker

StyleModelAmpsVoltagePrice (inc. GST)
APGL36060600A600V-
RFQ
BPGL36080U33A800600-
RFQ
APGL36080800A600V-
RFQ
CPGL361001000-A$ 27934.70
CPGL36100U41A1000A600V-
RFQ
CPGL36100U44A1000A600VA$ 34658.02
CPGL361201200-A$ 27934.70
CPGL36120U41A1200A600VA$ 27934.70
CPGL36120U44A1200A600VA$ 34658.02
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MJL Series Molded Case Circuit Breakers

Square D MJL Series circuit breakers are designed to protect sensitive circuits from excessive current flows causing overloads or short circuits. These circuit breakers feature a programmable electronic trip for short-time, long-time & instantaneous tripping and a solid-state protection system for electronically controlling the current flow & providing advanced safety for appliances. These breakers are equipped with line and load side lug terminals to accommodate wires (copper / aluminium) of sizes ranging between 500 kcmil & 3 AWG. These circuit breakers provide current ratings up to 800A and deliver interrupt capacity of 100kA at 240VAC, 65kA at 480VAC and 25kA at 600VAC.

StyleModelAmpsPrice (inc. GST)
AMJL36300300A$ 16750.50
AMJL36350350A$ 16750.50
AMJL36400400A$ 16750.50
AMJL36450450A$ 16750.50
AMJL36500500A$ 15861.58
AMJL36600600A$ 15861.58
AMJL36700700A$ 31880.24
AMJL36800800A$ 16750.50
BMJL36800AA800A$ 22130.09
RFQ
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MGL Series Molded Case Circuit Breakers

Square D MGL Series circuit breakers protect industrial machinery and equipment from damages caused by short-circuit and overload occurrences. They feature a programmable electronic trip for long-time, short-time & instantaneous tripping and a solid-state protection system for electronically controlling the current flow. They are equipped with line and load side lug terminals to ensure ease-of-wiring and maximum conductivity. MGL Series circuit breakers are available in M frame size on Raptor Supplies.

StyleModelAmpsPrice (inc. GST)
AMGL36300300A$ 15135.49
AMGL36350350A$ 18586.26
AMGL36400400A$ 15135.49
AMGL36450450A$ 15135.49
AMGL36500500A$ 15135.49
AMGL36600600A$ 15135.49
AMGL36700700A$ 16173.34
AMGL36800800A$ 16173.34
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HDL Series Molded Case Circuit Breakers

Square D HDL Series molded case circuit breakers provide overcurrent or short-circuit protection in industrial & commercial loadcentres and are ideal against severe overloading & mild nuisance tripping. These circuit breakers feature a thermal-magnetic trip for providing both long-time and instantaneous circuit protection and line & load side lug terminals for accommodating aluminium / copper wires & providing a secure connection. They are equipped with a centre placed toggle actuator for manual tripping and fault indication. The free-standing mounting style offers easy and quick installation. HDL Series circuit breakers are available in 2 and 3 pole options on Raptor Supplies.

StyleModelAmpsFrame SizeNumber Of PolesPhaseVoltageWidthPrice (inc. GST)
AHDL360202060A/HD33-4.1"A$ 1641.43
BHDL260202060A/HD21-2.7"A$ 1520.95
BHDL260252560A/HD21-2.7"A$ 1641.43
BHDL260303060A/HD21-2.7"A$ 1520.95
CHDL360303060A/HD33-4.1"A$ 1641.43
DHDL360353560A/HD33-4.1"A$ 1728.39
BHDL2603535A-2-600V-A$ 1641.43
EHDL260404060A/HD21-2.7"A$ 1520.95
FHDL360404060A/HD33-4.1"A$ 1641.43
CHDL360454560A/HD33-4.1"A$ 1728.39
EHDL2604545A-2-600V-A$ 1641.43
AHDL360505060A/HD33-4.1"A$ 1641.43
EHDL260505060A/HD21-2.7"A$ 1520.95
GHDL36060U33X60-3-600-A$ 2872.96
GHDL36060U31X60-3-600-A$ 2603.41
HHDL260606060A/HD21-2.7"A$ 1520.95
CHDL360606060A/HD33-4.1"A$ 1641.43
AHDL3607070100A/HD33-4.1"A$ 1972.29
HHDL2607070100A/HD21-2.7"A$ 1686.85
GHDL36070SA70-3-600-A$ 2426.83
AHDL3608080100A/HD33-4.1"A$ 1972.29
GHDL36080SA80-3-600--
RFQ
IHDL2608080100A/HD21-2.7"A$ 1686.85
JHDL3609090100A/HD33-4.1"A$ 1972.29
IHDL2609090A-2-600V-A$ 1686.85
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LHL Series Molded Case Circuit Breakers

Square D LHL Series circuit breakers are designed for protection from short circuits and current overloads. They feature a thermal magnetic trip unit to provide both instantaneous and long-time current limiting protection and are equipped with line & load side lug terminals to allow feed-thru connection. These UL listed circuit breakers deliver a high interrupting capacity of 35kA at 480V and a maximum current rating of 400A. They come with a molded case to hold current-carrying components, trip devices and other mechanisms in a compact space.

StyleModelAmpsVoltagePrice (inc. GST)
ALHL36125125A600VA$ 9306.43
BLHL36150150A600VA$ 9306.43
CLHL36175175A600V-
RFQ
DLHL36200200A600V-
RFQ
ELHL36225225A600V-
RFQ
FLHL36250250-A$ 10533.28
GLHL36300-1021300600A$ 9296.28
RFQ
HLHL36300300A600VA$ 9306.43
FLHL36350350-A$ 9306.43
GLHL36400-1021400600A$ 9251.93
GLHL36400MB400600A$ 9306.43
ILHL36000M400A600VA$ 9306.43
JLHL36400400A600V-
RFQ
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Molded Case Circuit Breakers, LA Frame Type

Square D LA Series circuit breakers are primarily designed for automatically opening a circuit under current overloads and short-circuit conditions. These units feature a fixed thermal-magnetic trip, with interrupting ratings of 42kA @ 120VAC, 30kA @ 480VAC and 22kA @ 600 VAC, providing instantaneous and time-delayed functions. The molded case of these C-curve protectors hold the current-carrying components, trip devices and other mechanisms within a very small space. Choose from a wide range of these circuit breakers available in 2- and 3-pole configurations on Raptor Supplies.

StyleModelAmpsNumber Of PolesPhasePrice (inc. GST)
ALA3612512533A$ 10608.35
ALA3615015033A$ 12595.36
ALA3617517533A$ 21463.20
BLA3620020033A$ 10608.35
CLA3622522533A$ 10608.35
DLA36250-10212503--
RFQ
ELA3625025033A$ 10608.35
ALA26300AC30021A$ 9872.77
FLA3630030033A$ 10608.35
DLAF363503503--
RFQ
DLAB363503503--
RFQ
GLA3640040033A$ 10608.35
ALA26400AC40021A$ 9872.77
DLA36400-10214003--
RFQ
DLA36400MT4003--
RFQ
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JJL Series Molded Case Circuit Breakers

Square D JJL Series molded case circuit breakers are used for protection of industrial machinery and equipment from short-circuit and overload occurrences. These breakers feature a thermal magnetic, non-interchangeable trip overriding mild overloads while instantly reacting to severe current spikes for maximum current limiting protection. These UL-listed breakers come with a molded case for holding current carrying components, trip devices and other mechanisms in a compact space. They come with line and load side lug terminals to ensure maximum conductivity and ease-of-wiring.

StyleModelAic RatingAmpsFrame TypeVoltagePrice (inc. GST)
AJJL36250M75-250--A$ 5232.10
BJJL36250SA-250JJL600-
RFQ
BJJL36250U33X-250JJL600A$ 10988.89
BJJL36250U44X-250JJL600-
RFQ
BJJL36200SA-200JJL600-
RFQ
BJJL36250U31X-250JJL600A$ 10988.89
BJJL36250LC-250JJL600-
RFQ
CJJL3617565kAIC@480V175AJJL600VA$ 5232.10
CJJL3620065kAIC@480V200AJJL600VA$ 5232.10
CJJL3625065kAIC@480V250AJJL600VA$ 5833.71
CJJL3622565kAIC@480V225AJJL600VA$ 5232.10
CJJL3615065kAIC@480V150AJJL600VA$ 5232.10
DJLL36225100kAIC@480V225AJLL600V-
RFQ
DJLL36150100kAIC@480V150AJLL600V-
RFQ
DJLL36200100kAIC@480V200AJLL600V-
RFQ
DJLL36250100kAIC@480V250AJLL600V-
RFQ
DJLL36175100kAIC@480V175AJLL600V-
RFQ
1...232425...54

Molded Case Circuit Breakers

Molded case circuit breakers are designed to prevent the flow of faulty power supplies into sensitive electrical equipment that may cause overloads and short circuits. With current ratings up to 1600A, these units are ideal for isolation applications in large PV systems. Raptor Supplies offers a wide range of these MCCBs from brands like ABB, Square D, Eaton, General Electric and Siemens. Square D circuit breakers come equipped with a thermal-magnetic trip unit which instantly opens under faulty currents and are capable of providing both time-delayed and instantaneous current limiting functions. These units feature an I-line type configuration at the ON end for facilitating bus connections in panelboards and lugs at the OFF end for cable connection. General Electric molded case circuit breakers feature a programmable electronic trip unit which accentuates the toggle when the current exceeds the predetermined value. These breakers come equipped with bolt-on type terminals for easy installation in reverse-feed applications. They are available in 2 and 3 pole options with a maximum voltage rating of 600VAC on Raptor Supplies.

Working Mechanism

Molded case circuit breaker's working mechanism includes following steps:

  • In the normal state, molded case circuit breakers allow electrical current to flow through the circuit uninterrupted.
  • When an overcurrent condition occurs, the MCCB's internal sensors detect the excess current flowing through the circuit.
  • They have two main trip mechanisms: electromagnetic trip and thermal trip.
  • The electromagnetic trip detects sudden, high-current surges, similar to short circuits, and quickly opens the circuit to cut power.
  • The thermal trip reacts to prolonged overloads by heating up, causing the MCCB to trip and disconnect the circuit.
  • Once the trip mechanism is activated, it triggers a mechanical release within the circuit breaker.
  • Hence, the breaker's contacts move quickly to the open position.
  • When the contacts are open, the MCCB interrupts the electrical flow, effectively cutting off power to the circuit.
  • The circuit remains in this disconnected state until manually reset by the user.

Features

General Electric Bolt-On Circuit Breakers:

  • These General Electric TEYH Series MCCBs have a thermal-magnetic, non-interchangeable trip unit to protect from severe power surges while avoiding tripping on mild overloads.
  • They also have a bolt-on mounting facility for convenience and compatibility with lug-lug / unit-mount applications.
  • These UL-listed breakers are available in single, two and three-pole configurations and accommodate universal 10 to 4 AWG size wires.

Square D PowerPacT Circuit Breakers :

  • These Square D MCCBs have a new front-facing and semi-transparent cover for easy access to accessories.
  • They have current ratings ranging from 15 to 125A and offer a maximum breaking capacity of 65kA at 480VAC.
  • These RoHS and REACH-compliant breakers feature dual-break rotating contacts that reduce peak current during a short circuit fault.

Eaton HKD Series Circuit Breakers :

  • Eaton HKD Series circuit breakers protect against overload and short circuit conditions in 480Y / 277V (three-phase, four-wire) distribution panels.
  • They have 2-pole construction and can serve two separate circuits or a complete single circuit when short-circuited.

Frequently Asked Questions

How does a molded case circuit breaker differ from a circuit breaker?

While both molded case circuit breakers and conventional circuit breakers serve the same primary purpose of protecting electrical circuits, MCCBs are a specific type of circuit breaker with a molded case for added durability and protection.

Can MCCBs be reset after tripping?

Once the fault or overload is resolved, you can reset the MCCB to restore power to the circuit.

What is the difference between an MCCB and a miniature circuit breaker (MCB)?

Molded case circuit breakers are designed for higher current ratings and are used in industrial settings with heavy machinery, while MCBs are smaller and designed for residential or light commercial applications with lower current ratings.

Can MCCBs be used in three-phase electrical systems?

Yes, MCCBs are commonly used in three-phase systems. Brands like WEG, Siemens and ABB come in various configurations to suit single-phase or three-phase applications.