In electric power systems and industrial automation, ANSI Device Numbers can be used to identify equipment and devices in a system such as relays, circuit breakers, or instruments. The device numbers are enumerated in ANSI/IEEE Standard C37.2 Standard for Electrical Power System Device Function Numbers, Acronyms, and Contact Designations.

ANSI Standard Device Numbers & Common Acronyms. GEDigitalEnergycom 3 Device No. Description 51_2 Negative Sequence Time Overcurrent 52 Ac Circuit Breaker 53 Exciter or Dc Generator Relay 54 Turning Gear Engaging Device 55 Power Factor Relay 56 Field Application Relay 57 Short-Circuiting or Grounding Device

The ANSI standard device numbers ( As per ANSI/IEEE standard C37.2) are used in the design of an electrical power system. These devices protect the electrical network in the case of a fault in the system. The list of ANSI device numbers with their acronyms is as given below.

In North America protective relays are generally referred to by standard device numbers. Letters are sometimes added to specify the application (IEEE Standard C37.2-2008).

In the design of electrical power systems, the ANSI Standard Device Numbers (ANSI /IEEE Standard C37.2) denote what features a protective device supports (such as a relay or circuit breaker). These types of devices protect electrical systems and components from damage when an unwanted event occurs, such as an electrical fault.

The protection and control devices in electrical equipment can be referred to by numbers, with appropriate suffix letters when necessary, according to the functions they perform.

2012年3月22日 · The widely used United Sates standard ANSI/IEEE C37.2 'Electrical Power System Device Function Numbers, Acronyms, and Contact Designations' deals with protective device function numbering and acronyms.

For power grid systems, ANSI and IEEE functional number codes dictate the use and restrictions of both the devices themselves, as well as the functions of those devices within the scope of a circuit. These devices include switches, disconnects, circuit breakers, generators, and motors.

ANSI DEVICE NUMBERS ansi device numbers2.qrk GE Power Management 2 Time-delay 21 Distance 25 Synchronism-check 27 Undervoltage 30 Annunciator 32 Directional power 37 Undercurrent or underpower 38 Bearing 40 Field 46 Reverse-phase 47 Phase-sequence voltage 49 Thermal 50 Instantaneous overcurrent 51 AC time overcurrent

2009年2月8日 · These device numbers and their application are typically in the domain of electrical engineers, specifically power generation, transmission or distribution system engineers in regards to safely controlling and protecting users and equipment [5] .