Current Transformer Symbol Iec

General this part of iec 60044 applies to newly manufactured electronic current transformers having an analogue voltage output or a digital output for use with electrical measuring instruments and electrical protective devices at nominal frequencies from 15 hz to 100 hz. 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. 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 non short circuit proof separating transformer.

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Current transformer symbol iec. P the individual secondary winding provides different current rating turns ratio. So a review the standard iec 61558 safety of power transformers power supplies reactors and similar products this is the relevant standard for transformers of all types and is applicable for isolating transformers. It produces a current in its secondary which is proportional to the current in its primary. Upon considering the design of the isolated power supply design a good question is what is the transformer iec 61558 standard in addition what do all the symbols mean.

Control current transformer symbol explanation dc single phase ac three phase ac three phase with neutral ac class 1 construction protective earth class ii construction. A current transformer ct is a type of transformer that is used to reduce or multiply an alternating current ac. P p autodesk is a leader in 3d design engineering and entertainment software. Current transformers along with voltage or potential transformers are instrument transformers instrument transformers scale the large values of voltage or current to small standardized.

The iec has members in 53 countries around the world. The knee point voltage is less applicable for metering current transformers as their accuracy is generally much tighter but constrained within a very small bandwidth of the current transformer rating typically 1 2 to 1 5 times rated current however the concept of knee point voltage is very pertinent to protection current transformers since they are necessarily exposed to currents of 20 or. P copyright 2020 autodesk inc. Current transformer is a type of instrument transformer used for decreasing high alternating current in a line down to safe levels for measurement purposes.

The current produced in its secondary is proportional to the current in its primary conductor it is measured by connecting it with a conventional ammeter. Horizontal symbol vertical symbol description hxf1ct vxf1ct ct current transformer hxf1ctr vxf1ctr ct flipped hxf1t1 vxf1t1 current transformer 2 hxf1t30 vxf1t30 with 2 secondaries independent magnetic circuits hxf1t31 vxf1t31 with 2 secondaries common magnetic circuit hxf1t32 vxf1t32 with tapped secondary winding hxf1t33 vxf1t33 with conductor indication. In each member country there is a committee respon sible for standardisation at a national level.