千瓦小时计

DD28 single-phase mechanical kilo watt-hour meter Product DescriptionElectromechanical meter, power meter, watt hour meter DD28 single-phase mechanical kilo watt-hour meter(meter, mechanical meter, household meter) is an induction meter which is applicable to measure the rated frequency of 50Hz or 60Hz. It has the features of small volume, tightly structure design, low power loss etc. All technical target are conformed to National Standard GB/T15283-94, International Standard IEC62053-11 and CE.Structure features: The meter has separable electromagnet and bearing has four kinds: Single-jewel, double-jewel, magnetic thrust and magnetic floating. The case adopts material of glass, plastic, polycarbonate, etc. The frame is aluminium alloy with excellent mechanical intensity.1. Case 1.1 base: 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 cables1.4 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 cables2. 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 6kv3. Braking element Braking element is made of monopolar magnet, its adjustment range comforms to requirements of IEC60521 4 Frame The meter frame is made of aluminum alloy with sufficient strength, it is painted for effective protection against corrosion5 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 loadAnti reverse device can be mounted in the meter if it is requiredUpper bearingWith excellent friction resistant property the upper bearing pin is of polished stainless steel to guide the rotating of the discLow bearing (optional)Double jewel bearingMagnetic bearing with metal enclosureMagnetic bearing with transparent enclosure the bearing enclosure is made of transparent polycarbonateMain technology characteristics 1. )Accuracy :2.0 2. )Rated voltage: 220V 3. ) Rated current: 5(20), 3(12), 10(40), 15(60), 20(80) A 4. )Overload capacity: 400%Ib 5. ) Starting current: 0.5%IbTypeAccu racy(Class)Raled Voltage(V)Rated CU rrentOverload CapacitySla rina CurrentInsulationDD282.0220V,230V,240V2(4),2.5(5),3(6),5(10),10(20), 20(40),30(60),40,(80)A200Ib0.5Ib6KVAC Voltage 2KV forDD28-45(15),5(20),10(40),20(80),30(100)A400IbIminute impulse voltage 6KV