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Power switches

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Power circuit-breaker for trafo/generator/installation protection Siemens 3RV24110HA10 Screw connection Built-in device fixed built-in technique Toggle IP20

Power circuit-breaker for trafo/generator/installation protection Siemens 3RV24110HA10 Screw connection Built-in device fixed built-in technique Toggle IP20

Elmark Sp. J. Jędrzejewska
Special offer
€27.10 +VAT
PLN 125.91
  • Rated permanent current Iu [A]: 0.8
  • Rated short-circuit breaking capacity lcu at 400 V, 50 Hz [kA]: 100
  • Number of auxiliary contacts as normally closed contact: 0
  • Number of auxiliary contacts as normally open contact: 0
  • Number of auxiliary contacts as change-over contact: 0
  • Integrated earth fault protection: No
  • Suitable for DIN rail (top hat rail) mounting: No
  • With switched-off indicator: No
  • Overload release current setting [A]: 0.55 - 0.8
  • Adjustment range undelayed short-circuit release [A]: 16 - 16
Supplier
Elmark Sp. J. Jędrzejewska
leave message
Power circuit-breaker for trafo/generator/installation protection Siemens 3RV28111GD10 Screw connection Built-in device fixed built-in technique Toggle IP20

Power circuit-breaker for trafo/generator/installation protection Siemens 3RV28111GD10 Screw connection Built-in device fixed built-in technique Toggle IP20

Elmark Sp. J. Jędrzejewska
Special offer
€59.56 +VAT
PLN 276.78
  • Rated permanent current Iu [A]: 6.3
  • Rated short-circuit breaking capacity lcu at 400 V, 50 Hz [kA]: 100
  • Number of auxiliary contacts as normally closed contact: 0
  • Number of auxiliary contacts as normally open contact: 0
  • Number of auxiliary contacts as change-over contact: 0
  • Integrated earth fault protection: No
  • Suitable for DIN rail (top hat rail) mounting: No
  • With switched-off indicator: No
  • With under voltage release: No
  • Adjustment range undelayed short-circuit release [A]: 130 - 130
Supplier
Elmark Sp. J. Jędrzejewska
leave message
Power circuit-breaker for trafo/generator/installation protection Siemens 3RV24314XA10 Screw connection Built-in device fixed built-in technique Toggle IP20

Power circuit-breaker for trafo/generator/installation protection Siemens 3RV24314XA10 Screw connection Built-in device fixed built-in technique Toggle IP20

Elmark Sp. J. Jędrzejewska
Special offer
€98.86 +VAT
PLN 459.37
  • Rated permanent current Iu [A]: 59
  • Rated short-circuit breaking capacity lcu at 400 V, 50 Hz [kA]: 65
  • Number of auxiliary contacts as normally closed contact: 0
  • Number of auxiliary contacts as normally open contact: 0
  • Integrated earth fault protection: No
  • Suitable for DIN rail (top hat rail) mounting: No
  • With switched-off indicator: No
  • With under voltage release: No
  • Overload release current setting [A]: 49 - 59
  • Adjustment range undelayed short-circuit release [A]: 1040 - 1040
Supplier
Elmark Sp. J. Jędrzejewska
leave message
Power circuit-breaker for trafo/generator/installation protection Siemens 3RV24111HA10 Screw connection Built-in device fixed built-in technique Toggle IP20

Power circuit-breaker for trafo/generator/installation protection Siemens 3RV24111HA10 Screw connection Built-in device fixed built-in technique Toggle IP20

Elmark Sp. J. Jędrzejewska
Special offer
€28.73 +VAT
PLN 133.51
  • Rated permanent current Iu [A]: 8
  • Rated short-circuit breaking capacity lcu at 400 V, 50 Hz [kA]: 100
  • Number of auxiliary contacts as normally closed contact: 0
  • Number of auxiliary contacts as normally open contact: 0
  • Number of auxiliary contacts as change-over contact: 0
  • Integrated earth fault protection: No
  • Suitable for DIN rail (top hat rail) mounting: No
  • With switched-off indicator: No
  • Overload release current setting [A]: 5.5 - 8
  • Adjustment range undelayed short-circuit release [A]: 163 - 163
Supplier
Elmark Sp. J. Jędrzejewska
leave message
Power circuit-breaker for trafo/generator/installation protection Siemens 3RV24111CA15 Screw connection Built-in device fixed built-in technique Toggle IP20

Power circuit-breaker for trafo/generator/installation protection Siemens 3RV24111CA15 Screw connection Built-in device fixed built-in technique Toggle IP20

Elmark Sp. J. Jędrzejewska
Special offer
€34.69 +VAT
PLN 161.20
  • Rated permanent current Iu [A]: 2.5
  • Rated short-circuit breaking capacity lcu at 400 V, 50 Hz [kA]: 100
  • Number of auxiliary contacts as normally closed contact: 1
  • Number of auxiliary contacts as normally open contact: 1
  • Number of auxiliary contacts as change-over contact: 0
  • Integrated earth fault protection: No
  • Suitable for DIN rail (top hat rail) mounting: No
  • With switched-off indicator: No
  • Overload release current setting [A]: 1.8 - 2.5
  • Adjustment range undelayed short-circuit release [A]: 52 - 52
Supplier
Elmark Sp. J. Jędrzejewska
leave message
Power circuit-breaker for trafo/generator/installation protection Siemens 3RV24214CA15 Screw connection Built-in device fixed built-in technique Toggle IP20

Power circuit-breaker for trafo/generator/installation protection Siemens 3RV24214CA15 Screw connection Built-in device fixed built-in technique Toggle IP20

Elmark Sp. J. Jędrzejewska
Special offer
€41.24 +VAT
PLN 191.62
  • Rated permanent current Iu [A]: 22
  • Rated short-circuit breaking capacity lcu at 400 V, 50 Hz [kA]: 55
  • Number of auxiliary contacts as normally closed contact: 1
  • Number of auxiliary contacts as normally open contact: 1
  • Number of auxiliary contacts as change-over contact: 0
  • Integrated earth fault protection: No
  • Suitable for DIN rail (top hat rail) mounting: No
  • With switched-off indicator: No
  • Overload release current setting [A]: 16 - 22
  • Adjustment range undelayed short-circuit release [A]: 364 - 364
Supplier
Elmark Sp. J. Jędrzejewska
leave message
Power circuit-breaker for trafo/generator/installation protection Siemens 3RV24214DA10 Screw connection Built-in device fixed built-in technique Toggle IP20

Power circuit-breaker for trafo/generator/installation protection Siemens 3RV24214DA10 Screw connection Built-in device fixed built-in technique Toggle IP20

Elmark Sp. J. Jędrzejewska
Special offer
€40.58 +VAT
PLN 188.57
  • Rated permanent current Iu [A]: 25
  • Rated short-circuit breaking capacity lcu at 400 V, 50 Hz [kA]: 55
  • Number of auxiliary contacts as normally closed contact: 0
  • Number of auxiliary contacts as normally open contact: 0
  • Number of auxiliary contacts as change-over contact: 0
  • Integrated earth fault protection: No
  • Suitable for DIN rail (top hat rail) mounting: No
  • With switched-off indicator: No
  • Overload release current setting [A]: 18 - 25
  • Adjustment range undelayed short-circuit release [A]: 400 - 400
Supplier
Elmark Sp. J. Jędrzejewska
leave message
Power circuit-breaker for trafo/generator/installation protection Siemens 3RV24110KA10 Screw connection Built-in device fixed built-in technique Toggle IP20

Power circuit-breaker for trafo/generator/installation protection Siemens 3RV24110KA10 Screw connection Built-in device fixed built-in technique Toggle IP20

Elmark Sp. J. Jędrzejewska
Special offer
€28.73 +VAT
PLN 133.51
  • Rated permanent current Iu [A]: 1.25
  • Rated short-circuit breaking capacity lcu at 400 V, 50 Hz [kA]: 100
  • Number of auxiliary contacts as normally closed contact: 0
  • Number of auxiliary contacts as normally open contact: 0
  • Number of auxiliary contacts as change-over contact: 0
  • Integrated earth fault protection: No
  • Suitable for DIN rail (top hat rail) mounting: No
  • With switched-off indicator: No
  • Overload release current setting [A]: 0.9 - 1.25
  • Adjustment range undelayed short-circuit release [A]: 26 - 26
Supplier
Elmark Sp. J. Jędrzejewska
leave message
Power circuit-breaker for trafo/generator/installation protection Siemens 3RV24111JA100BA0 Screw connection Built-in device fixed built-in technique Toggle IP20

Power circuit-breaker for trafo/generator/installation protection Siemens 3RV24111JA100BA0 Screw connection Built-in device fixed built-in technique Toggle IP20

Elmark Sp. J. Jędrzejewska
Special offer
€42.87 +VAT
PLN 199.22
  • Rated permanent current Iu [A]: 10
  • Rated short-circuit breaking capacity lcu at 400 V, 50 Hz [kA]: 100
  • Number of auxiliary contacts as normally closed contact: 0
  • Number of auxiliary contacts as normally open contact: 0
  • Number of auxiliary contacts as change-over contact: 0
  • Integrated earth fault protection: No
  • Suitable for DIN rail (top hat rail) mounting: No
  • With switched-off indicator: No
  • Overload release current setting [A]: 7 - 10
  • Adjustment range undelayed short-circuit release [A]: 208 - 208
Supplier
Elmark Sp. J. Jędrzejewska
leave message
Power circuit-breaker for trafo/generator/installation protection Siemens 3RV24111EA15 Screw connection Built-in device fixed built-in technique Toggle IP20

Power circuit-breaker for trafo/generator/installation protection Siemens 3RV24111EA15 Screw connection Built-in device fixed built-in technique Toggle IP20

Elmark Sp. J. Jędrzejewska
Special offer
€34.69 +VAT
PLN 161.20
  • Rated permanent current Iu [A]: 4
  • Rated short-circuit breaking capacity lcu at 400 V, 50 Hz [kA]: 100
  • Number of auxiliary contacts as normally closed contact: 1
  • Number of auxiliary contacts as normally open contact: 1
  • Number of auxiliary contacts as change-over contact: 0
  • Integrated earth fault protection: No
  • Suitable for DIN rail (top hat rail) mounting: No
  • With switched-off indicator: No
  • Overload release current setting [A]: 2.8 - 4
  • Adjustment range undelayed short-circuit release [A]: 82 - 82
Supplier
Elmark Sp. J. Jędrzejewska
leave message
Power circuit-breaker for trafo/generator/installation protection Siemens 3RV24110BA10 Screw connection Built-in device fixed built-in technique Toggle IP20

Power circuit-breaker for trafo/generator/installation protection Siemens 3RV24110BA10 Screw connection Built-in device fixed built-in technique Toggle IP20

Elmark Sp. J. Jędrzejewska
Special offer
€27.10 +VAT
PLN 125.91
  • Rated permanent current Iu [A]: 0.2
  • Rated short-circuit breaking capacity lcu at 400 V, 50 Hz [kA]: 100
  • Number of auxiliary contacts as normally closed contact: 0
  • Number of auxiliary contacts as normally open contact: 0
  • Number of auxiliary contacts as change-over contact: 0
  • Integrated earth fault protection: No
  • Suitable for DIN rail (top hat rail) mounting: No
  • With switched-off indicator: No
  • Overload release current setting [A]: 0.14 - 0.2
  • Adjustment range undelayed short-circuit release [A]: 4.2 - 4.2
Supplier
Elmark Sp. J. Jędrzejewska
leave message
Power circuit-breaker for trafo/generator/installation protection Siemens 3RV24110AA20 Spring clamp connection Built-in device fixed built-in technique Toggle IP20

Power circuit-breaker for trafo/generator/installation protection Siemens 3RV24110AA20 Spring clamp connection Built-in device fixed built-in technique Toggle IP20

Elmark Sp. J. Jędrzejewska
Special offer
€27.10 +VAT
PLN 125.91
  • Rated permanent current Iu [A]: 0.16
  • Rated short-circuit breaking capacity lcu at 400 V, 50 Hz [kA]: 100
  • Number of auxiliary contacts as normally closed contact: 0
  • Number of auxiliary contacts as normally open contact: 0
  • Number of auxiliary contacts as change-over contact: 0
  • Integrated earth fault protection: No
  • Suitable for DIN rail (top hat rail) mounting: No
  • With switched-off indicator: No
  • Overload release current setting [A]: 0.11 - 0.16
  • Adjustment range undelayed short-circuit release [A]: 3.3 - 3.3
Supplier
Elmark Sp. J. Jędrzejewska
leave message
Power circuit-breaker for trafo/generator/installation protection Siemens 3RV24111KA20 Spring clamp connection Built-in device fixed built-in technique Toggle IP20

Power circuit-breaker for trafo/generator/installation protection Siemens 3RV24111KA20 Spring clamp connection Built-in device fixed built-in technique Toggle IP20

Elmark Sp. J. Jędrzejewska
Special offer
€31.75 +VAT
PLN 147.51
  • Rated permanent current Iu [A]: 12.5
  • Rated short-circuit breaking capacity lcu at 400 V, 50 Hz [kA]: 100
  • Number of auxiliary contacts as normally closed contact: 0
  • Number of auxiliary contacts as normally open contact: 0
  • Number of auxiliary contacts as change-over contact: 0
  • Integrated earth fault protection: No
  • Suitable for DIN rail (top hat rail) mounting: No
  • With switched-off indicator: No
  • Overload release current setting [A]: 9 - 12.5
  • Adjustment range undelayed short-circuit release [A]: 260 - 260
Supplier
Elmark Sp. J. Jędrzejewska
leave message
Power circuit-breaker for trafo/generator/installation protection Siemens 3RV24110EA10 Screw connection Built-in device fixed built-in technique Toggle IP20

Power circuit-breaker for trafo/generator/installation protection Siemens 3RV24110EA10 Screw connection Built-in device fixed built-in technique Toggle IP20

Elmark Sp. J. Jędrzejewska
Special offer
€27.10 +VAT
PLN 125.91
  • Rated permanent current Iu [A]: 0.4
  • Rated short-circuit breaking capacity lcu at 400 V, 50 Hz [kA]: 100
  • Number of auxiliary contacts as normally closed contact: 0
  • Number of auxiliary contacts as normally open contact: 0
  • Number of auxiliary contacts as change-over contact: 0
  • Integrated earth fault protection: No
  • Suitable for DIN rail (top hat rail) mounting: No
  • With switched-off indicator: No
  • Overload release current setting [A]: 0.28 - 0.4
  • Adjustment range undelayed short-circuit release [A]: 8.2 - 8.2
Supplier
Elmark Sp. J. Jędrzejewska
leave message
Power circuit-breaker for trafo/generator/installation protection Siemens 3RV24314JA10 Screw connection Built-in device fixed built-in technique Toggle IP20

Power circuit-breaker for trafo/generator/installation protection Siemens 3RV24314JA10 Screw connection Built-in device fixed built-in technique Toggle IP20

Elmark Sp. J. Jędrzejewska
Special offer
€98.86 +VAT
PLN 459.37
  • Rated permanent current Iu [A]: 65
  • Rated short-circuit breaking capacity lcu at 400 V, 50 Hz [kA]: 65
  • Number of auxiliary contacts as normally closed contact: 0
  • Number of auxiliary contacts as normally open contact: 0
  • Integrated earth fault protection: No
  • Suitable for DIN rail (top hat rail) mounting: No
  • With switched-off indicator: No
  • With under voltage release: No
  • Overload release current setting [A]: 54 - 65
  • Adjustment range undelayed short-circuit release [A]: 1040 - 1040
Supplier
Elmark Sp. J. Jędrzejewska
leave message
Power circuit-breaker for trafo/generator/installation protection Siemens 3RV24111GA20 Spring clamp connection Built-in device fixed built-in technique Toggle IP20

Power circuit-breaker for trafo/generator/installation protection Siemens 3RV24111GA20 Spring clamp connection Built-in device fixed built-in technique Toggle IP20

Elmark Sp. J. Jędrzejewska
Special offer
€28.73 +VAT
PLN 133.51
  • Rated permanent current Iu [A]: 6.3
  • Rated short-circuit breaking capacity lcu at 400 V, 50 Hz [kA]: 100
  • Number of auxiliary contacts as normally closed contact: 0
  • Number of auxiliary contacts as normally open contact: 0
  • Number of auxiliary contacts as change-over contact: 0
  • Integrated earth fault protection: No
  • Suitable for DIN rail (top hat rail) mounting: No
  • With switched-off indicator: No
  • Overload release current setting [A]: 4.5 - 6.3
  • Adjustment range undelayed short-circuit release [A]: 130 - 130
Supplier
Elmark Sp. J. Jędrzejewska
leave message
Power circuit-breaker for trafo/generator/installation protection Siemens 3RV24111KA10 Screw connection Built-in device fixed built-in technique Toggle IP20

Power circuit-breaker for trafo/generator/installation protection Siemens 3RV24111KA10 Screw connection Built-in device fixed built-in technique Toggle IP20

Elmark Sp. J. Jędrzejewska
Special offer
€31.75 +VAT
PLN 147.51
  • Rated permanent current Iu [A]: 12.5
  • Rated short-circuit breaking capacity lcu at 400 V, 50 Hz [kA]: 100
  • Number of auxiliary contacts as normally closed contact: 0
  • Number of auxiliary contacts as normally open contact: 0
  • Number of auxiliary contacts as change-over contact: 0
  • Integrated earth fault protection: No
  • Suitable for DIN rail (top hat rail) mounting: No
  • With switched-off indicator: No
  • Overload release current setting [A]: 9 - 12.5
  • Adjustment range undelayed short-circuit release [A]: 260 - 260
Supplier
Elmark Sp. J. Jędrzejewska
leave message
Power circuit-breaker for trafo/generator/installation protection Siemens 3RV28111DD10 Screw connection Built-in device fixed built-in technique Toggle IP20

Power circuit-breaker for trafo/generator/installation protection Siemens 3RV28111DD10 Screw connection Built-in device fixed built-in technique Toggle IP20

Elmark Sp. J. Jędrzejewska
Special offer
€59.56 +VAT
PLN 276.78
  • Rated permanent current Iu [A]: 3.2
  • Rated short-circuit breaking capacity lcu at 400 V, 50 Hz [kA]: 100
  • Number of auxiliary contacts as normally closed contact: 0
  • Number of auxiliary contacts as normally open contact: 0
  • Number of auxiliary contacts as change-over contact: 0
  • Integrated earth fault protection: No
  • Suitable for DIN rail (top hat rail) mounting: No
  • With switched-off indicator: No
  • With under voltage release: No
  • Adjustment range undelayed short-circuit release [A]: 65 - 65
Supplier
Elmark Sp. J. Jędrzejewska
leave message
Power circuit-breaker for trafo/generator/installation protection Siemens 3RV24110JA20 Spring clamp connection Built-in device fixed built-in technique Toggle IP20

Power circuit-breaker for trafo/generator/installation protection Siemens 3RV24110JA20 Spring clamp connection Built-in device fixed built-in technique Toggle IP20

Elmark Sp. J. Jędrzejewska
Special offer
€28.73 +VAT
PLN 133.51
  • Rated permanent current Iu [A]: 1
  • Rated short-circuit breaking capacity lcu at 400 V, 50 Hz [kA]: 100
  • Number of auxiliary contacts as normally closed contact: 0
  • Number of auxiliary contacts as normally open contact: 0
  • Number of auxiliary contacts as change-over contact: 0
  • Integrated earth fault protection: No
  • Suitable for DIN rail (top hat rail) mounting: No
  • With switched-off indicator: No
  • Overload release current setting [A]: 0.7 - 1
  • Adjustment range undelayed short-circuit release [A]: 21 - 21
Supplier
Elmark Sp. J. Jędrzejewska
leave message
Power circuit-breaker for trafo/generator/installation protection Siemens 3RV27111ED10 Screw connection Built-in device fixed built-in technique Toggle IP20

Power circuit-breaker for trafo/generator/installation protection Siemens 3RV27111ED10 Screw connection Built-in device fixed built-in technique Toggle IP20

Elmark Sp. J. Jędrzejewska
Special offer
€55.31 +VAT
PLN 257.01
  • Rated permanent current Iu [A]: 4
  • Rated short-circuit breaking capacity lcu at 400 V, 50 Hz [kA]: 100
  • Number of auxiliary contacts as normally closed contact: 0
  • Number of auxiliary contacts as normally open contact: 0
  • Number of auxiliary contacts as change-over contact: 0
  • Integrated earth fault protection: No
  • Suitable for DIN rail (top hat rail) mounting: No
  • With switched-off indicator: No
  • With under voltage release: No
  • Adjustment range undelayed short-circuit release [A]: 52 - 52
Supplier
Elmark Sp. J. Jędrzejewska
leave message
Power circuit-breaker for trafo/generator/installation protection Siemens 3RV27114AD10 Screw connection Built-in device fixed built-in technique Toggle IP20

Power circuit-breaker for trafo/generator/installation protection Siemens 3RV27114AD10 Screw connection Built-in device fixed built-in technique Toggle IP20

Elmark Sp. J. Jędrzejewska
Special offer
€65.13 +VAT
PLN 302.63
  • Rated permanent current Iu [A]: 16
  • Rated short-circuit breaking capacity lcu at 400 V, 50 Hz [kA]: 55
  • Number of auxiliary contacts as normally closed contact: 0
  • Number of auxiliary contacts as normally open contact: 0
  • Number of auxiliary contacts as change-over contact: 0
  • Integrated earth fault protection: No
  • Suitable for DIN rail (top hat rail) mounting: No
  • With switched-off indicator: No
  • With under voltage release: No
  • Adjustment range undelayed short-circuit release [A]: 208 - 208
Supplier
Elmark Sp. J. Jędrzejewska
leave message
Power circuit-breaker for trafo/generator/installation protection Siemens 3RV24111AA10 Screw connection Built-in device fixed built-in technique Toggle IP20

Power circuit-breaker for trafo/generator/installation protection Siemens 3RV24111AA10 Screw connection Built-in device fixed built-in technique Toggle IP20

Elmark Sp. J. Jędrzejewska
Special offer
€28.73 +VAT
PLN 133.51
  • Rated permanent current Iu [A]: 1.6
  • Rated short-circuit breaking capacity lcu at 400 V, 50 Hz [kA]: 100
  • Number of auxiliary contacts as normally closed contact: 0
  • Number of auxiliary contacts as normally open contact: 0
  • Number of auxiliary contacts as change-over contact: 0
  • Integrated earth fault protection: No
  • Suitable for DIN rail (top hat rail) mounting: No
  • With switched-off indicator: No
  • Overload release current setting [A]: 1.1 - 1.6
  • Adjustment range undelayed short-circuit release [A]: 33 - 33
Supplier
Elmark Sp. J. Jędrzejewska
leave message
Power circuit-breaker for trafo/generator/installation protection Siemens 3RV24111KA15 Screw connection Built-in device fixed built-in technique Toggle IP20

Power circuit-breaker for trafo/generator/installation protection Siemens 3RV24111KA15 Screw connection Built-in device fixed built-in technique Toggle IP20

Elmark Sp. J. Jędrzejewska
Special offer
€37.96 +VAT
PLN 176.41
  • Rated permanent current Iu [A]: 12.5
  • Rated short-circuit breaking capacity lcu at 400 V, 50 Hz [kA]: 100
  • Number of auxiliary contacts as normally closed contact: 1
  • Number of auxiliary contacts as normally open contact: 1
  • Number of auxiliary contacts as change-over contact: 0
  • Integrated earth fault protection: No
  • Suitable for DIN rail (top hat rail) mounting: No
  • With switched-off indicator: No
  • Overload release current setting [A]: 9 - 12.5
  • Adjustment range undelayed short-circuit release [A]: 260 - 260
Supplier
Elmark Sp. J. Jędrzejewska
leave message
Power circuit-breaker for trafo/generator/installation protection Siemens 3RV24111AA20 Spring clamp connection Built-in device fixed built-in technique Toggle IP20

Power circuit-breaker for trafo/generator/installation protection Siemens 3RV24111AA20 Spring clamp connection Built-in device fixed built-in technique Toggle IP20

Elmark Sp. J. Jędrzejewska
Special offer
€28.73 +VAT
PLN 133.51
  • Rated permanent current Iu [A]: 1.6
  • Rated short-circuit breaking capacity lcu at 400 V, 50 Hz [kA]: 100
  • Number of auxiliary contacts as normally closed contact: 0
  • Number of auxiliary contacts as normally open contact: 0
  • Number of auxiliary contacts as change-over contact: 0
  • Integrated earth fault protection: No
  • Suitable for DIN rail (top hat rail) mounting: No
  • With switched-off indicator: No
  • Overload release current setting [A]: 1.1 - 1.6
  • Adjustment range undelayed short-circuit release [A]: 33 - 33
Supplier
Elmark Sp. J. Jędrzejewska
leave message
Didn't find what you were looking for? We will help you!

Power switches

ACBs are a specific type of electrical breaker. They are intended especially for industrial applications, because it is thanks to them that the electrical network can work without any problems. Power switches are used where very high power is turned off. As a result, they protect against overloads and short circuits of devices in the same circuit. Circuit breakers of this type can also be used to control power distribution in a network.

Power switches:

characteristic

The construction and operation of devices whose main role is protection of electrical devices always depends on the intended use of a particular circuit breaker. Therefore, three main types of ACB can be distinguished. They are:

  1. low-voltage circuit-breakers up to 1000 V, using the arc breaking mechanism to quench the arc and trip the circuit breaker,
  2. medium voltage power circuit-breakers (also called vacuum circuit-breakers), which trip on decay of the arc, whereby the pairs of materials from which the contacts are made to break the circuit are lost
  3. high-voltage power circuit-breakers, up to 500 kV, which are complex designs with many technological changes.

The general principle of operation of ACBs is based on the fact that in the connected circuit, the current leads to the formation of an electric arc, and the activation of the switch is related to the extinction of the arc current. The arc extinction mechanisms are different. Power switches are professional devices that minimize the negative effects of overload or short-circuits .

The selection of a circuit breaker to protect specific electrical devices is made on the basis of data obtained about the voltage and rated current of the connected equipment. It is important to sum up all values ​​for a specific circuit. The power switches available on the market have a large power range and impressive adjustment possibilities, so simply comparing the motor power with the power switch rated current is not enough. When choosing low-voltage circuit-breakers, you need to know the inrush currents. Also, care must be taken that the ACB is not one safety device in a particular system.

Power switches: overcurrent detection

Power switches protecting electrical equipment against overloads or short circuits also control the power flow in the network. They are perfect for switching stations and high-voltage systems, where protection of electrical devices is necessary. The low-voltage power circuit breakers available on the market are distinguished by high load capacity and low energy dissipation. In addition, the ACBs operate without problems at high ambient temperatures. Professional devices used industrially detect overloads such as:

  1. overloads identified by thermal trigger,
  2. short circuits recognizable by an electromagnetic release,
  3. overloads and short circuits, which are detected by an electronic trip unit.

Thermal and electromagnetic releases are usually combined in thermal-magnetic circuit breakers, with limited possibilities to change parameter settings, compared to electronic releases.

The selection of individual switches is made taking into account parameters such as: short-circuit capacity, number of modules or rated voltage. Modern electrical devices guarantee the creation of an insulation gap in the electrical circuit or a circuit break in the event of an overload or short circuit. Each circuit breaker, as a so-called short-circuit switch, is suitable for loads that exceed 10 times the rated current. Therefore, it is used to disconnect short circuits in an electrical circuit. By deciding to purchase a specific device with optimal parameters, you get a guarantee that it will work perfectly in industrial conditions. Especially when the equipment supplier is a proven manufacturer.