Iec Relay Symbols

One is given in ansi standard c37 2 and uses a numbering system for various functions.

Iec relay symbols. Jic nfpa sample drawing. Iec symbols 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. 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. Horizontal symbol vertical symbol description htd1n vtd1n on delay coil htd1f vtd1f off delay coil hcr1ood vcr1ood on off delay htd1k25 vtd1k25 3 clamp delay relay energized htd1k27 vtd1k27 3 clamp delay relay de energized htd1k29 vtd1k29 3 clamp delay relay energized de energized htd1k5 vtd1k5 latency relay htd21n vtd21n on delay normally open delay close htd22n vtd22n on delay.

Selection from iec 617 and ansi ieee c37 2 1991 617 ansi ieee c37 2 1991. The relay are switching devices activated by signals. 1 relay symbols and device numbers. Relay symbols and device numbers.

The functions are supplemented by letters where amplification of the function is required. 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. Over voltage relay iec symbols. There are two methods for indicating protection relay functions in common use.

Selection from iec 617 ieee c37 2 1991 and ieee c37 2 1979 1mrk 590 006 ben page 3 test switch contacts 1. Iec 60617 sample drawing.