Iec Protection Relay Symbols

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 these types of devices protect electrical systems and components from damage when an unwanted event occurs such.

Iec protection relay symbols. Even in those parts of the world where iec standards are. Selection from iec 617 ieee c37 2 1991 and ieee c37 2 1979 1mrk 590 006 ben page 3 test switch contacts 1. Horizontal symbol vertical symbol description hcr21 vcr21 relay normally open contact hcr22 vcr22 relay normally closed contact hcr23r vcr23r relay form c hcr23 vcr23 relay form c flipped hcr1 vcr1 relay coil hlr1 vlr1 latch relay coil hlr2 vlr2 latch relay child coil hcr1ssd vcr1ssd solid state hcr1hsp vcr1hsp high speed hcr1acu vcr1acu ac unaffected hcr1ac vcr1ac ac hcr1pol vcr1pol. Most of the time a small voltage or current is used to switch other voltages or higher currents that may be electromechanical or fully electronic type.

These types of devices protect electrical systems and components from damage when an unwanted event occurs such as an electrical fault. The other is given in iec 60617 and uses graphical symbols. Current protection relays. Time delay relays.

Push to test lights. Relays and contacts. 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. Relays with suppression.

Relay symbols and device numbers. In the design of electrical power systems the ansi standard device numbers denote what features a protective device supports such as a relay or circuit breaker. Break contact voltage supply circuit late. Relay symbols and electromagnets.

Protection relay ansi standards. Protection relays important informations. Voltage protection relays. 1 phase motors.

To assist the protection engineer in converting from one system to the other a select list of ansi device numbers and their iec equivalents is given in figure a2 1. Iec 60617 standard series symbols and designations 9 comparison of ansi ieee with iec symbols 10 topic page changed title to specify protection and control 1 added additional bulletin numbers 1 updated year to c37 2 1996 2 added definition and function for device numbers 11 and 16 2 changed device number 34 definiti on to master sequence device 3. Standard electrical iec symbols also known as iec 60617 british standard bs 3939 used to represent various devices including pilot lights relays timers and switches for usage in electrical schematic diagrams.