Circuit breakers

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Circuit breakers | Choosing the Right Circuit Breaker
A circuit breaker is an essential safety device for any piece of equipment or network through which an electric current flows. Quite simply it will, as the name indicates, break the circuit and stop the current flowing if it detects any dangerous anomalous current, voltage, or temperature levels in the circuit. Generally, in an industrial context, electricity passes through a circuit-breaker box where it is divided into several circuits. Each of these circuits will...
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digital circuit breaker
digital circuit breaker
MasterPact MTZ

Primary current: 630 A - 6,300 A
VAC: 220, 415 V
Rating: 800 A - 1,000 A

... Future Ready ! MasterPact MTZ is a comprehensive range of air circuit breakers, to protect from damage caused by overloads, short- circuits or insulation faults. MasterPact MTZ embeds advanced digital ...

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Schneider Electric
thermal-magnetic circuit breaker
thermal-magnetic circuit breaker
TeSys GV2

Primary current: 138 A
VAC: 0 V - 690 V
Rating: 10 A

... TeSys GV motor circuit breaker, 3 poles (3P), 10A/690V, for 3-phase motor applications 3-4kW@400V. It provides a thermal-magnetic protection with a thermal setting range 6-10A, magnetic tripping at 13xIn, high breaking ...

thermal-magnetic circuit breaker
thermal-magnetic circuit breaker
1489-M series

Primary current: 0.5 A - 63 A
VAC: 480, 230, 400 V
VDC: 48, 96 V

... Bulletin 1489-M Thermal-magnetic Circuit Breakers are UL 489 Listed for branch circuit protection in the United States and Canada, and they are certified as Miniature Circuit Breakers ...

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Allen-Bradley
voltage circuit breaker
voltage circuit breaker
SB6100 series

Primary current: 10 mA - 100 mA
VAC: 600 V

... Special-Purpose Ground-Fault Circuit Interrupter (SPGFCI), Class C and Class D The Industrial Shock Block® SB6000 series is a personnel protection device designed to meet the requirements for special-purpose GFCIs defined by UL 943C. ...

air-operated circuit breaker
air-operated circuit breaker
AE-SW series

Primary current: 1,000 A - 6,300 A
VAC: 500 V

... Make electrical equipment multi-functional by means of Mitsubishi air circuit breakers that are suitable for protection of the main circuit Air circuit breakers have ...

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MITSUBISHI Automation
digital circuit breaker
digital circuit breaker
T733H160E10

Primary current: 160 A
VAC: 690 V
Rating: 160 A

... Product overview
Moulded-case circuit breaker MEGATIKER M3 250H electronic 3P. Rated current: 160 A, breaking capacity: 70 kA, setting type S10.

Technical features
Brand: BTicino
Reference ...

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BTICINO
thermal circuit breaker
thermal circuit breaker
TA36

Primary current: 0.05 A - 20 A
VAC: 240 V
VDC: 32, 60 V

... • Snap-in version • Positively trip-free release • Method of operation acc. to IEC: S-type • Different rocker and flange colours • Wide current range Unique Selling Proposition • Unique UL rating of 277 VAC • Finely graded rated currents • ...

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SCHURTER
electronic circuit breaker
electronic circuit breaker
5TY1350 series

Primary current: 16, 10, 6 A
VAC: 230 V

... (electronic circuit protection device) is one of the first of its kind in the world with electronic switching. Its impressive features include ultra-fast switching, flexible parameterization, and a wide range of functions. The smart circuit ...

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Siemens Low-voltage – Power distribution
live-tank circuit breaker
live-tank circuit breaker
GL 107X

Primary current: 2,000 A
VAC: 36, 38, 40.5 kV

... -blast principle. This live tank circuit breaker provides a high level of reliability for customers, even under extreme conditions and climates or in highly active seismic areas. The GL 107X live tank circuit ...

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GE Grid Solutions
generator circuit breaker
generator circuit breaker
HB3-C

Primary current: 15,000 A
VAC: 24 kV

... The compact design of the HB3-C generator circuit- breaker is customizable and offers an ideal solution for retrofit projects and new applications. It’s maintenance-free and SF6-free for more efficiency and sustainability. The ...

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Siemens Medium-voltage – Power distribution
vacuum circuit breaker
vacuum circuit breaker
3AV1 Blue LT

Primary current: 40,000 A
VAC: 145 kV
Rating: 30 A

... availability and lowest maintenance efforts Moreover, it has a number of features superior to SF6 circuit- breakers. These include 30 full short- circuit current interruptions, 10,000 rated current ...

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Siemens Energy – Power transmission
SF6 circuit breaker
SF6 circuit breaker
HVS-63S

Primary current: 6,900, 7,150 A
VAC: 24 kV

... System type generator circuit- breaker (GCB) with innovative built-in monitoring The HVS-63S GCB with SF6 interrupting technology for short- circuit currents up to 63 kA and rated currents up to 7,150 ...

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Hitachi Energy
SF6 circuit breaker
SF6 circuit breaker
LW28 (A)

Primary current: 4,000, 5,000 A
VAC: 550 kV

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Sieyuan Electric Co., Ltd
overcurrent circuit breaker
overcurrent circuit breaker

Primary current: 30 A - 5,000 A
VAC: 120 V - 600 V

... cost. Breaker-based Service Entrance Rated transfer switches are available from 30A to 5000A. Benefits ATC-300+ or ATC-900 on MCCB & Power Breaker ATS products Keyed service entrance switch Draw-out type breakers ...

thermal-magnetic circuit breaker
thermal-magnetic circuit breaker
4 173 10

Primary current: 6 A - 10 A
VAC: 220 V - 690 V
Rating: 130 A

single-pole circuit breaker
single-pole circuit breaker
MS3320

Primary current: 0.5 A - 30 A

... Electromechanical Circuit Breakers (CB) with several different terminals (FASTON, EN, MIL...) and accessories. ...

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Crouzet
motor protection circuit breaker
motor protection circuit breaker
8146/5-V27-501-072-00-11-1

Primary current: 1.6 A - 2.5 A
VAC: 400, 230, 500 V

... Moulded case circuit breaker for The motor protection Auxiliary contacts: without Release: without Enclosure material: Polyester resin Cable glands and entries: 2 x M25 Ø 7 – 17 mm Highlights - Electric line and ...

vacuum circuit breaker
vacuum circuit breaker
Calix series

Primary current: 0 A - 4,000 A
VAC: 0 kV - 12 kV

... The 12KV VCB (CALIX) is designed for rapid auto reclosing duty with SCADA compatible control system. With an optional features like draw-out type PT, Powerpack, and an Integral earth switch, series trip arrangement for unmanned substation ...

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CG Power Systems
SF6 gas-insulated circuit breaker
SF6 gas-insulated circuit breaker
LW35S-252

Primary current: 3,150, 4,000 A
VAC: 252 kV

... The LW35-252 self-sustaining SF6 circuit breaker is used for splitting and merging rated current, breaking fault currents, or switching lines to achieve control and protection of transmission lines. This circuit ...

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Henan ping high electric co., LTD.
vacuum circuit breaker
vacuum circuit breaker
HFT series

Primary current: 1,250, 630 A
VAC: 12 kV

... ●Rated short- circuit breaking current 25kA ●Mechanical endurance10000ops ●one circle welding ●CuCr meterial for contact ●High insulation、Small volume、Long lifetime HFTF-12/630-25E Features ● Rated short- circuit ...

power circuit breaker
power circuit breaker
RDW1-1000 series

Primary current: 200 A - 1,000 A
VAC: 400, 380 V

... RDW1-1000 air circuit breaker, applied to power distribution network of AC50Hz, Rated voltage 400V (or 380V), Rated current from 200A to 1000A. It is mainly used to distribute electric power and protect the circuit ...

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PEOPLE ELE. APPLIANCE GROUP CO., LTD.
thermal-magnetic circuit breaker
thermal-magnetic circuit breaker
H000TD

Primary current: 25 A - 315 A
VAC: 690 V
Rating: 25 A - 315 A

... Product name
Molded-case circuit breaker H000TD/H000TD-T
Designed for protection and switching of low-voltage electrical circuits.

Technical summary
Rated current: 25A-315A
Rated ...

vacuum circuit breaker
vacuum circuit breaker
V12-630-20 KUF

Primary current: 630 A
VAC: 12 kV

The switches are designed for normal operating conditions acc. to EN 62271¬1, Class "Minus 5 Indoor”. A proper functioning is also guaranteed up to temperatures of up to ¬15°C. The maximum value of the ambient temperature is 40°C; the average value over ...

thermal-magnetic circuit breaker
thermal-magnetic circuit breaker
RECmaxMP series

VAC: 240, 415 V
Rating: 6 A - 63 A

... RECmax MP series are motorized circuit breakers that can be linked remotely. They offer protection against short- circuits and overloads, and can also be used as a circuit breaker. ...

overload circuit breaker
overload circuit breaker
MT series

Primary current: 6 A - 63 A
VAC: 240, 415 V

... The motorized circuit breakers of the MT Series can be associated remotely. They protect against short- circuits and overloads, but are also used as a circuit breaker. ...

differential circuit breaker
differential circuit breaker
RECmaxLPD series

Primary current: 6 A - 63 A
VAC: 240, 415 V

... with circuit breaker and ultra-immunised residual current protection. Programmable unit with display, which measures leakage currents (residual current protection), and orders the disconnection or reclosing of the circuit ...

thermal-magnetic circuit breaker
thermal-magnetic circuit breaker

VAC: 230 V
Rating: 2 A - 32 A

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DIGITAL ELECTRIC
thermal-magnetic circuit breaker
thermal-magnetic circuit breaker
MTZ‐D234 series

Primary current: 2 A - 125 A
VAC: 12 V - 400 V
Rating: 1 A - 63 A

... Magneto-thermal circuit breakers allow the circuit to be cut off in the event of overcurrent or a dead short circuit, while surge protectors will act on overvoltages of atmospheric origin. These ...

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DIGITAL ELECTRIC
residual current circuit breaker
residual current circuit breaker
JVS16-C

Primary current: 15,000, 20,000 A
VAC: 320 V

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DIGITAL ELECTRIC
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How to choose this product
circuit-breaker

A circuit breaker is an electrical protection device that cuts power to an electrical cable in case of overvoltage, short circuit or if the circuit presents an isolation defect.

Applications

Circuit breakers are used in industrial facilities to protect circuits and electrical machinery.

Technologies

Thermal circuit-breakers use a bimetallic strip that expands and opens the circuit in the presence of excessive currents. It protects conductors from prolonged over amperage and fire-risks. Magnetic circuit-breakers use a coil, as in relays. They can open the circuit immediately or after pre-set delays (e.g. for motor-starting). Thermal magnetic circuit-breakers combine these two systems. High-end electronic circuit-breakers can be adjusted for extremely precise activation.

Differential circuit-breakers protect against ground leakage. In case of isolation defects, the sum of the phase currents is not equal to the current circulating in the neutral. A magnetic circuit uses this difference to trigger the device. Circuit-breakers interrupt power to electrical supply lines. High-voltage circuit-breakers use gas, oil or compressed air to increase their ability to cut power and extinguish electrical arcs.

How to choose

The main parameters are the rated current (In), well under the trip level (Icu or Icn), beyond which the circuit's integrity is at risk, and the device's class.

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