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Product Description

DD28 Meter is applicable for single phase active energy measurement, it is designed to meet IEC60521 standard for indoor and outdoor installation

1. Case

1.1 base: Steel sheet

Weather proof steel sheet

1.2 meter cover: It is made of ABS material, flame resistant, in black colour with glass window. Meter cover can also be made of transparent glass, weather proof, and transparent plastic.

1.3 terminal block: It is made of phenolic resin, flame resistant, in black color, voltage link can be inside the meter base or outside the meter base.

Terminals are made of brass having two screws for tightening the external cables

1.4 terminal block cover

Short steel cover rubber underside the cover assures insulation between the cover and the terminal block

Short ABS cover non flammability of ABS, cover conforms to requirements of IEC60521

Extended steel cover rubber underside the cover ensures insulation between the cover and the terminal block, access is available at each side of the terminal cover for external cables

2. Driving element

Current electromagnet

The overload compensating set mounted on the laminated silicon steel core assures the excellent load curve performance

Voltage electromagnet

The design of voltage electromagnet permits to withstand the impulse voltage of 6kv

3. Braking element

Braking element is made of monopolar magnet, its adjustment range conforms to requirements of IEC60521

4 Frame

The meter frame is made of aluminum alloy with sufficient strength, it is painted for effective protection against corrosion

5 Moving element

Worm gear on the rotor shaft is made of brass or optionally plastic one,

Anti creeping pin is fitted to the rotor shaft to prevent running with no load

Anti reverse device can be mounted in the meter if it is required

Upper bearing

With excellent friction resistant property the upper bearing pin is of polished stainless steel to guide the rotating of the disc

Low bearing (optional )

Double jewel bearing

Magnetic bearing with metal enclosure

Magnetic bearing with transparent enclosure the bearing enclosure is made of transparent polycarbonate

6. Register

The register is of cyclometer type, with frame made of aluminum alloy, digit drums are made of polycarbonate, UV radiation resistant, the register is fixed on the meter frame by two screws it is adjustable to assure good mesh of worm with the rotor shaft

Unidirectional register is available

7, name plate

Printing ink used for name plate is UV radiation resistant one

Trademark: XIANKAI

Model: DD28 Aluminum cover

Standard: IEC 521 GB