LOVATO Electric GmbH

Current transformer kits with UTF certificates

The UTF (Finance Technical Office) certification is required in case of applications where taxes have to be paid due to energy production (Italian regulations for plants >20kW). The certificates must be associated to the energy meter (MID version, see page 24-13 for selection) and to each single current transformer is needed.

DME energy meters, MID version, for three-phase systems with or without current transformers can be supplied with the certificates included (DME...F). DME D310 F... can be expanded up to 3 EXM modules.

If required, the fifth certificate relevant to the meter and current transformer combination can be supplied as well. The DM...TP type accuracy current 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...TP are accuracy current transformers in class 0.5s without a primary winding and are normally used for high primary current values starting from 60A.

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
• Rated insulation voltage Ui: 720V
• Rated short time thermal current Ith: 40-60Ipn for 1 second
• Rated dynamic current Idyn: 2.5Ith for 1 second
• Insulation (dry type): class E
• Screw fixing terminals
• Sealable terminal covers
• Fixing on 35mm DIN rail (IEC/EN 60715) or by screws (fixing elements standard supplied with the product)
• EN degree of protection: IP30.

Ambient conditions

• Operating temperature: -25...+50°C
• Storage temperature: -40...+80°C.
• Relative humidity, non condensing: 90%.

Compliance
Compliant with standards: IEC/EN 61869-2, IEC/EN 61869-1.