What is BS 5581 - Specifications for control switches about?
BS 5581 is a British standard that applies to control switches according to IEC Standard 337-1, with two definite positions (such as push-buttons, limit-switches, and similar devices), irrespective of their construction, having terminal marking in accordance with the corresponding marking of contactor relays designated by the distinctive letter E.
The use of BS 5581 is recommended where terminal marking is a requirement of the relevant standard for control switches or is the usual practice.
Who is BS 5581 - Specifications for control switches for?
BS 5581 on specifications for control switches is useful for:
- The electrical industry
- Electrical equipment manufacturers
- The manufacturing industry
- Control switch manufacturers/suppliers
- Quality assurance managers
Why should you use BS 5581 - Specifications for control switches?
Controlled switching for circuit breakers has increased circuit breaker life and longer intervals between interrupter maintenance or retrofit, and added value associated with circuit breaker performance enhancement during a current interruption in the thermal or dielectric region.
BS 5581 provides its users with guidelines for the terminal marking rule, distinctive numbers, and terminal numbering sequence.
Using BS 5581 guidelines ensures safety and protection, quality assurance, reliability, and durability for longer service life.
