DM… Solid – Core Current Transformers

Lovato Electric

DM… Solid – Core Current Transformers

DM… Solid – Core Current Transformers for Lovato Metering Instruments

  • The instrument transformers (CTs) in the DM series are installed in an electrical system to reduce the line current to a secondary value of 5A compatible with the ammeter inputs of the digital multi-meters or protection relays. DM… are instrument transformers in class 1/0.5 without a primary winding and are normally used for high primary current values starting from 50A. The number of loops of the primary cable does not modify the accuracy but converts the primary current value proportional to secondary current.
  • Operational Characteristics: 

– Operating frequency: 50-60Hz.

– Secondary output current: 5A.

– Overload withstand: 120% Ipn.

– IEC rated insulation voltage UI: 720V.

– Insulation (dry tape): Class E.

– Terminals: Faston for DM2T and DM3T types; Screw for DM0T, DM4T and DM5T types.

– Sealable terminal covers for DM0T, DM4T and DM35T types.

– Fixing on 35mm DIN rail(IEX/EN 60715) or by screws (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
    DM0T0050  For 22mm diameter cable. Primary current/5 = 50A; Burden(VA): Class 1 = 1.25.
    DM0T0060  For 22mm diameter cable. Primary current/5 = 60A; Burden(VA): Class 1 = 1.5.
    DM0T0080  For 22mm diameter cable. Primary current/5 = 80A; Burden(VA): Class 1 = 1.5.
    DM0T0100  For 22mm diameter cable. Primary current/5 = 100A; Burden(VA): Class 1 = 1.5.
    DM0T0150  For 22mm diameter cable. Primary current/5 = 150A; Burden(VA): Class 1 = 2.
    DM2T0100  For 30mm diameter cable. For 30x10mm, 25×12.5mm, 20x15mm busbars. Primary current/5 = 100A; Burden(VA): Class 1 = 1.
    DM2T0150  For 30mm diameter cable. For 30x10mm, 25×12.5mm, 20x15mm busbars. Primary current/5 = 150A; Burden(VA): Class 1 = 1.5.
    DM2T0200  For 30mm diameter cable. For 30x10mm, 25×12.5mm, 20x15mm busbars. Primary current/5 = 200A; Burden(VA): Class 1 = 2.
    DM2T0250  For 30mm diameter cable. For 30x10mm, 25×12.5mm, 20x15mm busbars. Primary current/5 = 250A; Burden(VA): Class 1 = 2.5.
    DM2T0300  For 30mm diameter cable. For 30x10mm, 25×12.5mm, 20x15mm busbars. Primary current/5 = 300A; Burden(VA): Class 0,5 = 1.5, Class 1 = 3.
    DM2T0400  For 30mm diameter cable. For 30x10mm, 25×12.5mm, 20x15mm busbars. Primary current/5 = 400A; Burden(VA): Class 0,5 = 2, Class 1 = 3.
     DM3T0200  For 30mm diameter cable. For 40x10mm, 30x20mm, 25x25mm busbars. Primary current/5 = 200A; Burden(VA): Class 1 = 5.
    DM3T0250  For 30mm diameter cable. For 40x10mm, 30x20mm, 25x25mm busbars. Primary current/5 = 250A; Burden(VA): Class 1 = 5.
    DM3T0300  For 30mm diameter cable. For 40x10mm, 30x20mm, 25x25mm busbars. Primary current/5 = 300A; Burden(VA): Class 0,5 = 2.5, Class 1 = 5.
    DM3T0400  For 30mm diameter cable. For 40x10mm, 30x20mm, 25x25mm busbars. Primary current/5 = 400A; Burden(VA): Class 0,5 = 2.5, Class 1 = 5.
    DM3T0500  For 30mm diameter cable. For 40x10mm, 30x20mm, 25x25mm busbars. Primary current/5 = 500A; Burden(VA): Class 0,5 = 2.5, Class 1 = 5.
    DM3T0600  For 30mm diameter cable. For 40x10mm, 30x20mm, 25x25mm busbars. Primary current/5 = 600A; Burden(VA): Class 0,5 = 5, Class 1 = 10.
    DM3T0800  For 30mm diameter cable. For 40x10mm, 30x20mm, 25x25mm busbars. Primary current/5 = 800A; Burden(VA): Class 0,5 = 5, Class 1 = 10.
    DM35T0800  For 66mm diameter cable. For 80×12.5mm, 60x30mm, 50x50mm busbars. Primary current/5 = 800A; Burden(VA): Class 0,5 = 10, Class 1 = 15.
    DM35T1000  For 66mm diameter cable. For 80×12.5mm, 60x30mm, 50x50mm busbars. Primary current/5 = 1000A; Burden(VA): Class 0,5 = 15, Class 1 = 20.
    DM35T1250  For 66mm diameter cable. For 80×12.5mm, 60x30mm, 50x50mm busbars. Primary current/5 = 1250A; Burden(VA): Class 0,5 = 15, Class 1 = 20.
    DM4T1000  For 86mm diameter cable. For 100x30mm, 80x50mm, 70x60mm busbars. Primary current/5 = 1000A; Burden(VA): Class 0,5 = 10, Class 1 = 20.
    DM4T1250  For 86mm diameter cable. For 100x30mm, 80x50mm, 70x60mm busbars. Primary current/5 = 1250A; Burden(VA): Class 0,5 = 15, Class 1 = 30.
    DM4T1500  For 86mm diameter cable. For 100x30mm, 80x50mm, 70x60mm busbars. Primary current/5 = 1500A; Burden(VA): Class 0,5 = 20, Class 1 = 30.
    DM4T1600  For 86mm diameter cable. For 100x30mm, 80x50mm, 70x60mm busbars. Primary current/5 = 1600A; Burden(VA): Class 0,5 = 20, Class 1 = 30.
    DM4T2000  For 86mm diameter cable. For 100x30mm, 80x50mm, 70x60mm busbars. Primary current/5 = 2000A; Burden(VA): Class 0,5 = 30, Class 1 = 45.
    DM4T2500  For 86mm diameter cable. For 100x30mm, 80x50mm, 70x60mm busbars. Primary current/5 = 2500A; Burden(VA): Class 0,5 = 35, Class 1 = 45.
    DM4T3000  For 86mm diameter cable. For 100x30mm, 80x50mm, 70x60mm busbars. Primary current/5 = 3000A; Burden(VA): Class 0,5 = 45, Class 1 = 45.
    DM4T3500  For 86mm diameter cable. For 100x30mm, 80x50mm, 70x60mm busbars. Primary current/5 = 3500A; Burden(VA): Class 0,5 = 50, Class 1 = 50.
    DM4T4000  For 86mm diameter cable. For 100x30mm, 80x50mm, 70x60mm busbars. Primary current/5 = 3500A; Burden(VA): Class 0,5 = 50, Class 1 = 50.

(please see linked PDF’s for further information)