Isolator - AC23A operation

  • Thread starter nisham
  • Start date
In summary, the differences between the AC22A and AC23A switches are that the AC23A is more robust and can handle more inductive loads.
  • #1
nisham
2
0
Dears,

Can anyone brief what is the operation functionality of AC23A operation of isolators & what is the difference between AC22A & AC23A operation.
 
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  • #2
It would seem it's just a difference in ratings, AC23 being robust enough for more highly inductive loads.

http://www.hevacomphelp.com/ELEC/1pdf/MCP/0001.PDF
DEFINITIONS OF UTILIZATION
CATEGORY
AC20A Connecting and disconnecting
under no load condition.
AC21A Switching of resistive loads
including moderate overloads.
AC22A Switching of mixed resistive
and inductive loads including
moderate overloads.
AC23A Switching of motor, or other



Was that the question?
There'll be differences in contact size & material, and in the arc quenching apparatus.

This link gives power factor of 65% for AC22, 35% for AC23
http://www.gil-lec.co.uk/custom/upload/pdfs/circuit%20protection/Hager_Isolators_Switches.pdf

and suggests that a given switch may be used for more severe duty at reduced current
Manufacturers may assign more than one AC duty rating to their
devices. For example an AC22 switch can be given a lower
current rating when assigned to AC23 duty. Manufacturers may
also assign a maximum kW power rating for motors or a kVAr
reactive power rating for capacitors.


If you're looking for construction details , i'd take apart a few from different manufacturers to see how they get around one another's patents.
 
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  • #3
Thank you, even i have the same information as you have told. i would like to know what makes the AC23A duty to give a different current rating than other duty. Also what is the theoretical reason behind introducing such different duties in isolators.
 
  • #4
nisham said:
Thank you, even i have the same information as you have told. i would like to know what makes the AC23A duty to give a different current rating than other duty. Also what is the theoretical reahttp://www.gil-lec.co.uk/custom/upload/pdfs/circuit%20protection/Hager_Isolators_Switches.pdfson [Broken] behind introducing such different duties in isolators.


again, http://www.gil-lec.co.uk/custom/upload/pdfs/circuit%20protection/Hager_Isolators_Switches.pdf
Common types of defined switching category:
• 20 Connecting & disconnecting under no load.
• 21 Switching of resistive loads.
• 22 Switching of mixed resistive & inductive loads.
• 23 Switching of highly inductive loads.

Have you ever played with inductors and noticed how the make an arc when you interrupt current?

That is rough service for a contact - it must be made from something that resists arc welding.

e = l di/dt
 
Last edited by a moderator:
  • #5


The operation functionality of an isolator refers to the way in which it functions to isolate an electrical circuit from the power source. In the case of AC23A operation, the isolator is designed to handle high loads and frequent switching operations, making it suitable for heavy-duty industrial applications.

The main difference between AC22A and AC23A operation lies in their load-breaking capabilities. While both can handle high loads, AC23A isolators are specifically designed to break and make load currents, whereas AC22A isolators are not. This means that AC23A isolators can safely and effectively interrupt high load currents, providing an added level of safety in industrial environments.

In summary, AC23A operation of isolators is optimized for high load handling and frequent switching, making it a reliable and efficient option for industrial settings. The key difference between AC22A and AC23A operation is the ability of AC23A isolators to safely break and make load currents.
 

What is an Isolator - AC23A?

An Isolator - AC23A is a type of electrical switch that is used to isolate a specific circuit or piece of equipment from the rest of the electrical system. It allows for the safe operation and maintenance of that isolated circuit without affecting the rest of the system.

How does an Isolator - AC23A operate?

The Isolator - AC23A operates by physically disconnecting the circuit or equipment from the main power source. It uses a rotating mechanism to open and close the circuit, creating a physical gap between the two parts. This prevents any current from flowing through the isolated circuit, ensuring the safety of those working on it.

What is the difference between an Isolator - AC23A and a circuit breaker?

An Isolator - AC23A is primarily used for isolation purposes, while a circuit breaker is used for both isolation and protection. A circuit breaker automatically breaks the circuit in case of an overload or short circuit, while an isolator must be manually operated. Additionally, a circuit breaker can be reset and reused, while an isolator must be replaced once it has been used.

Where are Isolator - AC23As commonly used?

Isolator - AC23As are commonly used in electrical systems that require regular maintenance or repairs. They are also often used in high voltage systems, such as power transmission lines, to isolate specific sections for maintenance work. They are also commonly used in industrial settings, such as factories, to isolate specific equipment for maintenance or safety purposes.

What are the safety precautions for operating an Isolator - AC23A?

When operating an Isolator - AC23A, it is important to follow all safety precautions to prevent electrical accidents. This includes ensuring that the equipment is de-energized before operating the isolator, using appropriate personal protective equipment, and following proper lockout/tagout procedures. It is also important to regularly inspect and maintain the isolator to ensure its safe operation.

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