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
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.
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 behind introducing such different duties in isolators.
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.
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.
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.
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.
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.
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.