What is a 52 device?

52 – AC circuit breaker. 52a – AC circuit breaker position (contact open when circuit breaker open) 52b – AC circuit breaker position (contact closed when circuit breaker open)

What is ANSI 32?

Reverse Active Power Protection (ANSI 32P) Presentation. Reverse active power protection (ANSI 32P) detects, and trips the circuit breaker, when a synchronous power generator connected to an external network, or running in parallel with other generators, operates as a synchronous motor.

What is ANSI code for over voltage relay?

ANSI 49RMS – Thermal overload Protection against thermal damage caused by overloads on machines (transformers, motors or generators).

What is the function of contact 52?

52a is a heavy-duty contact that is rated to interrupt that current so that the tripping devices (relays) do not have to. 3. Trip coil is not rated for continuous current. It needs to be de-energized as soon as possible after it has done its job to trip the breaker.

What does ANSI do?

The American National Standards Institute (ANSI) is a private, non-profit organization that administers and coordinates the U.S. voluntary standards and conformity assessment system.

What is ANSI function?

The ANSI protective functions are functions present in protective devices such as a relay. They are identified by the ANSI standard device numbers (ANSI / IEEE Standard C37. The objective of these functions is to protect electrical systems and components from damage when an unwanted event occurs.

What is ANSI IEEE standard?

The American National Standards Institute (ANSI) is a private non-profit organization that oversees the development of voluntary consensus standards for products, services, processes, systems, and personnel in the United States. The IEEE is best known for developing standards for the computer and electronics industry.

What do the ANSI standard device numbers mean?

In the design of electrical power systems, the ANSI standard device numbers (ANSI /IEEE Standard C37.2 Standard for Electrical Power System Device Function Numbers, Acronyms, and Contact Designations ) identifies the features of a protective device such as a relay or circuit breaker.

When did ANSI add suffix and prefix letters?

Suffix and prefix letters may be added to further specify the purpose and function of a device. ANSI/IEEE C37.2-2008 is one of a continuing series of revisions of the standard, which originated in 1928 as American Institute of Electrical Engineers Standard No. 26.

When to use prefixes and suffixes for device numbers?

Suffixes and prefixes. Device numbers may be combined if the device provides multiple functions, such as the Instantaneous / Time-delay Overcurrent relay denoted as 50/51. For device 16, the suffix letters further define the device: the first suffix letter is ‘S’ for serial or ‘E’ for Ethernet.

How are device numbers used in electrical power systems?

System of identifying electrical power devices. In the design of electrical power systems, the ANSI standard device numbers (ANSI / IEEE Standard C37.2 Standard for Electrical Power System Device Function Numbers, Acronyms, and Contact Designations ) identifies the features of a protective device such as a relay or circuit breaker.