DM 1/2 TMA… Compact Prewired Split-Core Current Transformers
DM 1/2 TMA… Compact Prewired Split-Core Current Transformers for Lovato Metering Instruments
- The DM…TMA type instrument transformers (CTs) 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 multimeters or protection relays. DM…TMA are instrument transformers in class 1 without a primary winding and are normally used for high primary current values starting from 100A.
- 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.
– Cable supplied as standard, length 1m.
– Ambient conditions: Operating temperature -25…+50 degrees Celsius; Storage temperature -40…+80 degrees Celsius; Relative humidity, non-condensing 90%.
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Order Code Description DM1TMA0100 For 24x24mm hole. Cable supplied as standard. Primary current/5 = 100A; Burden(VA): Class 1 = 1.2. DM1TMA0150 For 24x24mm hole. Cable supplied as standard. Primary current/5 = 150A; Burden(VA): Class 1 = 1.2. DM1TMA0200 For 24x24mm hole. Cable supplied as standard. Primary current/5 = 200A; Burden(VA): Class 1 = 1.2. DM1TMA0250 For 24x24mm hole. Cable supplied as standard. Primary current/5 = 250A; Burden(VA): Class 1 = 1.2. DM2TMA0250 For 36x38mm hole. Cable supplied as standard. Primary current/5 = 250A; Burden(VA): Class 1 = 1.5. DM2TMA0300 For 36x38mm hole. Cable supplied as standard. Primary current/5 = 300A; Burden(VA): Class 1 = 1.5. DM2TMA0400 For 36x38mm hole. Cable supplied as standard. Primary current/5 = 400A; Burden(VA): Class 1 = 1.5. DM2TMA0500 For 36x38mm hole. Cable supplied as standard. Primary current/5 = 500A; Burden(VA): Class 1 = 1.5.
(please see linked PDF’s for further information)
