Auxiliary contact block

Auxiliary switch blocks are an ideal supplement for auxiliary and power contactors. The auxiliary switch blocks we offer differ in design and mounting type, switching type (changeover, opener, closer) and number of contacts. Learn more about these devices in the following post. At eibabo® you will find a huge selection of high-quality auxiliary switch blocks with different specifications. These include:

  • Execution of the electrical connection
  • Type of installation and fastening
  • Height of the rated operational current
  • and more

 

Products such as the auxiliary switch block are among the low-voltage switching devices and are primarily used in electrical distribution installation and the installation of electrical distribution boards. Typical areas of application include engine controls and system controls, switching of lighting systems and multiplication of signals. Switch blocks expand the number of contacts with auxiliary contacts for control.

Already knew?

Contactors have auxiliary contacts and main contacts. The auxiliary contact is a mechanically operated contact in the auxiliary circuit. This is physically connected to the main contacts and is actuated simultaneously, carries less current and is called the auxiliary contact or control contact.


Find out more about the function, structure and use of an auxiliary switch block in the following article.

What is an auxiliary switch?

An auxiliary contact or auxiliary switch is an additional contact within a circuit. This is used to regulate the amount of current that can flow through the system. Such a device is often installed when more current needs to flow than a single contact can handle. In practice, at least two contacts are then required. If there were only one auxiliary contact, under certain circumstances too much current would flow at one point in the circuit. This means: some areas receive no power, other areas receive more power than required. The amount of current flowing through the individual areas can be regulated with two or more contacts. This ensures that an even and correct power supply is guaranteed everywhere.

How does an auxiliary switch work?

When an overload trips a relay or fuse, the connected cable is also heavily loaded. In order to exclude the associated dangers, another, usually larger, switch can be controlled with an auxiliary switch. The auxiliary switch consists of a coil with high-current contacts and two sets of low-current contacts. In contrast to the coils of the main switch, these are not designed for continuous operation in the entire system. However, the auxiliary switch has delay functions. These prevent arcing and possible damage when opening the auxiliary switch while the main switch is still live.

Source: eibabo®, Eaton DILA-XHI22 auxiliary switch moduleImage: Eaton DILA-XHI22 auxiliary switch module

Why should I use an auxiliary switch?

They protect your circuit breakers and devices from damage

Since auxiliary switches trip when a circuit is overloaded, the main switch or fuse are not overloaded. This protects your devices from damage caused by current spikes and heat build-up, to which your under-capacity fuses and circuit breakers would not respond. Auxiliary switches are often equipped with their own fuses. In the event of an overload due to a short circuit, its fuse will therefore trip without affecting the main circuit breaker. The auxiliary switch protects your devices from wear and tear, which would be caused by circuit breakers tripping frequently.

You protect yourself from electrical hazards

Auxiliary switches ensure that no dangerous electrical faults occur due to the triggering of overloads. If an overload is not triggered, this may lead to:

  • failures in the circuits
  • overheating of components
  • electric shocks
  • fire hazard

 

Auxiliary switches minimize these risks and ensure a safer working environment.

They minimize the risk of power failures

Auxiliary switches minimize the risk of power failures because the circuit breaker is not overloaded. Even before fuses or circuit breakers trip, an overloaded circuit can cause overheating, damage to equipment, personal injury from electric shock, and other malfunctions. Auxiliary switches trip in the event of overloads before a critical level is reached. This ensures optimal performance and life expectancy for your electrical system.

They increase the life expectancy of circuit breakers

Without an auxiliary contact, the circuit breaker would have to handle the additional current required by under-capacity circuits. This would degrade their ability to dissipate heat. And this leads to degradation of circuit breaker performance over time. Auxiliary switches limit the current and ensure that the main circuit breaker is not subjected to dangerous overloads.

What is the difference between auxiliary switches and circuit breakers?

A circuit breaker uses an insulating washer that separates the two sets of contacts. Protecting high currents and voltages on circuit breakers requires a lot of force to make a conductive connection.

 


The classic use

Most often, a circuit breaker with main contacts and auxiliary switches is used to control the operation of motor-driven equipment.


 

When the device is not powered, a spring mechanism keeps the two sets of contacts apart. When the circuit breaker is actuated, the spring is released and the two contacts come together.

An auxiliary switch requires less pressure to open and close. When closed, the two sets of contacts touch via a metal bridge. If there is a problem with the circuit breaker mechanism or an overload is detected, one pair of contacts will easily separate from the other. As a result, further protective measures can be taken, including opening the main contacts or turning them off completely. Auxiliary contacts are therefore used for monitoring, so that in the event of a malfunction, the main contacts can be opened before there is a problem with the device or the circuit breaker.

As a leading specialist center for electrical engineering, the eibabo® technology store only offers you high-quality auxiliary switches and auxiliary switch blocks. Our range includes products from the manufacturers ABB, Eao, Eaton, Hager, Mennekes, Schlegel, Siemens, Stahl and Steute. Use our numerous payment methods and have your order delivered directly and quickly worldwide.

 

eibabo - technology store

 

Catalogue content:


In this eibabo® catalogue Low-voltage industrial components > Auxiliary contact block you will find items from the following product groups:

Item overview:

  • Auxiliary switch
  • Built-in switch
  • Connection base
  • Contact set
  • Control unit
  • Engine monitoring
  • Flat connector
  • Fuse
  • Fuse cartridge
  • Inrush current limiter
  • Installation kit
  • Late break contact
  • Load disconnector
  • Pendant control
  • Phase barrier
  • Provision
  • Push button
  • Rail mounted devices
  • Reset
  • Sealing hood
  • Signaling contact
  • Switch block
  • Switch-on ready
  • Switching cycle counter
  • Switching element
  • Touch protection
  • Tripped signaling module
  • Voltage release


from the following manufacturers:

Manufacturer overview catalogue Auxiliary contact block:

  • ABB
  • Eao
  • Eaton
  • Euchner
  • Hager
  • Kraus & Naimer
  • Legrand Bticino
  • Mennekes
  • Mitsubishi
  • Rafi
  • Rockwell
  • Schlegel
  • Schmersal
  • Schneider Electric
  • Siemens
  • Stahl
  • Steute


 
Auxiliary switch blocks are an ideal supplement for auxiliary and power contactors. The auxiliary switch blocks we offer differ in design and mounting type, switching type (changeover, opener,... read more »
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Auxiliary switch block - function and structure briefly explained

Auxiliary switch blocks are an ideal supplement for auxiliary and power contactors. The auxiliary switch blocks we offer differ in design and mounting type, switching type (changeover, opener, closer) and number of contacts. Learn more about these devices in the following post. At eibabo® you will find a huge selection of high-quality auxiliary switch blocks with different specifications. These include:

  • Execution of the electrical connection
  • Type of installation and fastening
  • Height of the rated operational current
  • and more

 

Products such as the auxiliary switch block are among the low-voltage switching devices and are primarily used in electrical distribution installation and the installation of electrical distribution boards. Typical areas of application include engine controls and system controls, switching of lighting systems and multiplication of signals. Switch blocks expand the number of contacts with auxiliary contacts for control.

Already knew?

Contactors have auxiliary contacts and main contacts. The auxiliary contact is a mechanically operated contact in the auxiliary circuit. This is physically connected to the main contacts and is actuated simultaneously, carries less current and is called the auxiliary contact or control contact.


Find out more about the function, structure and use of an auxiliary switch block in the following article.

What is an auxiliary switch?

An auxiliary contact or auxiliary switch is an additional contact within a circuit. This is used to regulate the amount of current that can flow through the system. Such a device is often installed when more current needs to flow than a single contact can handle. In practice, at least two contacts are then required. If there were only one auxiliary contact, under certain circumstances too much current would flow at one point in the circuit. This means: some areas receive no power, other areas receive more power than required. The amount of current flowing through the individual areas can be regulated with two or more contacts. This ensures that an even and correct power supply is guaranteed everywhere.

How does an auxiliary switch work?

When an overload trips a relay or fuse, the connected cable is also heavily loaded. In order to exclude the associated dangers, another, usually larger, switch can be controlled with an auxiliary switch. The auxiliary switch consists of a coil with high-current contacts and two sets of low-current contacts. In contrast to the coils of the main switch, these are not designed for continuous operation in the entire system. However, the auxiliary switch has delay functions. These prevent arcing and possible damage when opening the auxiliary switch while the main switch is still live.

Source: eibabo®, Eaton DILA-XHI22 auxiliary switch moduleImage: Eaton DILA-XHI22 auxiliary switch module

Why should I use an auxiliary switch?

They protect your circuit breakers and devices from damage

Since auxiliary switches trip when a circuit is overloaded, the main switch or fuse are not overloaded. This protects your devices from damage caused by current spikes and heat build-up, to which your under-capacity fuses and circuit breakers would not respond. Auxiliary switches are often equipped with their own fuses. In the event of an overload due to a short circuit, its fuse will therefore trip without affecting the main circuit breaker. The auxiliary switch protects your devices from wear and tear, which would be caused by circuit breakers tripping frequently.

You protect yourself from electrical hazards

Auxiliary switches ensure that no dangerous electrical faults occur due to the triggering of overloads. If an overload is not triggered, this may lead to:

  • failures in the circuits
  • overheating of components
  • electric shocks
  • fire hazard

 

Auxiliary switches minimize these risks and ensure a safer working environment.

They minimize the risk of power failures

Auxiliary switches minimize the risk of power failures because the circuit breaker is not overloaded. Even before fuses or circuit breakers trip, an overloaded circuit can cause overheating, damage to equipment, personal injury from electric shock, and other malfunctions. Auxiliary switches trip in the event of overloads before a critical level is reached. This ensures optimal performance and life expectancy for your electrical system.

They increase the life expectancy of circuit breakers

Without an auxiliary contact, the circuit breaker would have to handle the additional current required by under-capacity circuits. This would degrade their ability to dissipate heat. And this leads to degradation of circuit breaker performance over time. Auxiliary switches limit the current and ensure that the main circuit breaker is not subjected to dangerous overloads.

What is the difference between auxiliary switches and circuit breakers?

A circuit breaker uses an insulating washer that separates the two sets of contacts. Protecting high currents and voltages on circuit breakers requires a lot of force to make a conductive connection.

 


The classic use

Most often, a circuit breaker with main contacts and auxiliary switches is used to control the operation of motor-driven equipment.


 

When the device is not powered, a spring mechanism keeps the two sets of contacts apart. When the circuit breaker is actuated, the spring is released and the two contacts come together.

An auxiliary switch requires less pressure to open and close. When closed, the two sets of contacts touch via a metal bridge. If there is a problem with the circuit breaker mechanism or an overload is detected, one pair of contacts will easily separate from the other. As a result, further protective measures can be taken, including opening the main contacts or turning them off completely. Auxiliary contacts are therefore used for monitoring, so that in the event of a malfunction, the main contacts can be opened before there is a problem with the device or the circuit breaker.

As a leading specialist center for electrical engineering, the eibabo® technology store only offers you high-quality auxiliary switches and auxiliary switch blocks. Our range includes products from the manufacturers ABB, Eao, Eaton, Hager, Mennekes, Schlegel, Siemens, Stahl and Steute. Use our numerous payment methods and have your order delivered directly and quickly worldwide.

 

eibabo - technology store

 

Catalogue content:


In this eibabo® catalogue Low-voltage industrial components > Auxiliary contact block you will find items from the following product groups:

Item overview:

  • Auxiliary switch
  • Built-in switch
  • Connection base
  • Contact set
  • Control unit
  • Engine monitoring
  • Flat connector
  • Fuse
  • Fuse cartridge
  • Inrush current limiter
  • Installation kit
  • Late break contact
  • Load disconnector
  • Pendant control
  • Phase barrier
  • Provision
  • Push button
  • Rail mounted devices
  • Reset
  • Sealing hood
  • Signaling contact
  • Switch block
  • Switch-on ready
  • Switching cycle counter
  • Switching element
  • Touch protection
  • Tripped signaling module
  • Voltage release


from the following manufacturers:

Manufacturer overview catalogue Auxiliary contact block:

  • ABB
  • Eao
  • Eaton
  • Euchner
  • Hager
  • Kraus & Naimer
  • Legrand Bticino
  • Mennekes
  • Mitsubishi
  • Rafi
  • Rockwell
  • Schlegel
  • Schmersal
  • Schneider Electric
  • Siemens
  • Stahl
  • Steute
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