DM 1/2/3/4 TA… Split-Core Current Transformers

DM 1/2/3/4 TA… Split-Core Current Transformers

DM 1/2/3/4 TA… Split-Core Current Transformers for Lovato Metering Instruments

• The DM…TA type instrument transformers (CTs) are installed in an electrical system to the reduce line current to a secondary value of 5A compatible with the ammeter inputs of the digital multimeters or protection relays. DM…TA are instrument transformers in class 0.5/1 without a primary winding and are normally used for high primary current values starting from 250A.

• Operational Characteristics: 

– Operating frequency: 50-60Hz.

– Secondary output current: 5A.

– Overload withstand: 120% Ipn.

– IEC rated insulation voltage UI: 720V.

– IEC rated short time thermal current Ith: 40-60 Ipn for 1 second.

– IEC rated dynamic current Idyn: 2.5 Ith for 1 second.

– Insulation (dry tape): Class E.

– Terminals: Screw terminals.

– Sealable terminal covers.

– Screw fixing (fixing elements standard supplied with product).

– IEC degree of protection: IP30.

– Ambient conditions: Operating temperature -25…+50 degrees Celsius; Storage temperature -40…+80 degrees Celsius; Relative humidity, non-condensing 90%.

• Order Code	Description
  DM1TA0250	50x80mm hole. Primary current/5 = 250A; Burden(VA): Class 0.5 = 1, Class 1 = 2.
  DM1TA0300	50x80mm hole. Primary current/5 = 300A; Burden(VA): Class 0.5 = 1.5, Class 1 = 3.
  DM1TA0400	50x80mm hole. Primary current/5 = 400A; Burden(VA): Class 0.5 = 1.5, Class 1 = 3.
  DM1TA0500	50x80mm hole. Primary current/5 = 500A; Burden(VA): Class 0.5 = 2.5, Class 1 = 5.
  DM1TA0600	50x80mm hole. Primary current/5 = 600A; Burden(VA): Class 0.5 = 2.5, Class 1 = 5.
  DM1TA0800	50x80mm hole. Primary current/5 = 800A; Burden(VA): Class 0.5 = 3, Class 1 = 7.5.
  DM1TA1000	50x80mm hole. Primary current/5 = 1000A; Burden(VA): Class 0.5 = 5, Class 1 = 10.
  DM2TA0250	80x80mm hole. Primary current/5 = 250A; Burden(VA): Class 0.5 = 1, Class 1 = 2.
  DM2TA0300	80x80mm hole. Primary current/5 = 300A; Burden(VA): Class 0.5 = 1.5, Class 1 = 3.
  DM2TA0400	80x80mm hole. Primary current/5 = 400A; Burden(VA): Class 0.5 = 1.5, Class 1 = 3.
  DM2TA0500	80x80mm hole. Primary current/5 = 500A; Burden(VA): Class 0.5 = 2.5, Class 1 = 5.
  DM2TA0600	80x80mm hole. Primary current/5 = 600A; Burden(VA): Class 0.5 = 2.5, Class 1 = 5.
  DM2TA0800	80x80mm hole. Primary current/5 = 800A; Burden(VA): Class 0.5 = 3, Class 1 = 7.5.
  DM2TA1000	80x80mm hole. Primary current/5 = 1000A; Burden(VA): Class 0.5 = 5, Class 1 = 10.
  DM3TA500	80x120mm hole. Primary current/5 = 500A; Burden(VA): Class 1 = 4.
  DM3TA600	80x120mm hole. Primary current/5 = 600A; Burden(VA): Class 1 = 5.
  DM3TA800	80x120mm hole. Primary current/5 = 800A; Burden(VA): Class 0.5 = 3, Class 1 = 7.5.
  DM3TA1000	80x120mm hole. Primary current/5 = 1000A; Burden(VA): Class 0.5 = 5, Class 1 = 10.
  DM3TA1250	80x120mm hole. Primary current/5 = 1250A; Burden(VA): Class 0.5 = 7.5, Class 1 = 15.
  DM3TA1500	80x120mm hole. Primary current/5 = 1500A; Burden(VA): Class 0.5 = 8, Class 1 = 17.
  DM4TA2000	80x160mm hole. Primary current/5 = 2000A; Burden(VA): Class 0.5 = 15, Class 1 = 20.
  DM4TA2500	80x160mm hole. Primary current/5 = 2500A; Burden(VA): Class 0.5 = 15, Class 1 = 20.
  DM4TA3000	80x160mm hole. Primary current/5 = 3000A; Burden(VA): Class 0.5 = 20, Class 1 = 25.
  DM4TA4000	80x160mm hole. Primary current/5 = 4000A; Burden(VA): Class 0.5 = 20, Class 1 = 25.

(please see linked PDF’s for further information)