Detailed Product Description
DD862 single phase watt hour meter(kwh meter,wattmeter)
Meter case
Two types of cases are available One is the insulating case of protective-class and the other is the weather-proof case complying to IEC60529 and Ip54
Terminal block
The terminal block is molded of bakelite. The voltage test link can be located inside or out-side of the meter case. The maximum diameter of the terminal hole is 8.5mm.
Driving element
The driving element consists of a voltage element and a current element, both of which are fixed to the frame. The voltage element has a low load adjustment mechanism, and the current
element has an inductive load adjustment mechanism.
Rotor
The rotor shaft is made of aluminum alloy with a small hole in the upper end for storing lubrication and for fitting a brass bearing The worm is turned of brass, and is acid-cleaned or nickel-plated.
The worm and shaft can be detached .
Braking element
The magnet is made of AINiCo5 alloy and designed as U-shaped so that the effect of short-time over current upon the magnet is negligible. The full load error can be fine controlled by adjustment mechanism.
Frame
The frame is die-casted by high-quality SiAl alloy of stable property to avoid distortion. The application of static spray-painting on the surface prevents the frame from oxidation.
Upper bearing
The pin is made of high-quality abrasion-proof stainless steel and is embedded on the brass pin base.
Lower bearing
Both double jewel bearing and magnetic bearing are available.
Register
The DD862 meter with direct-reading cyclometer type register is available.
The register is self-located and is mounted on the frame by one screw. Fixing with two screws
is also available but needs to be manually adjusted. There are two types of gears available: brass gears and self-lubricating plastic gears.
Single Phase Watt-Hour Meter
Typical Connection Diagram of Single Phase Watt-Hour Meter
Outline & Installation Size
Technical Parameters of Single Phase Watt-Hour Meter
1 | Meter type | DD862 |
2 | Applicable Standards | IEC60521. IEC514 |
3 | Accuracy | Class 2 (according to IEC60521) |
4 | Average service life (MTTF) | 10years |
5 | Basic current (lb) A | 1.5 2.5 3 5 10 15 20 30 |
6 | Maximum current (lmax) A | 6 10 12 20 40 50 60 80 100 |
7 | Rating current of transformer in | 5A Direct connection |
8 | Reference voltage Un | 110V,120V,220V,230V,240V |
9 | Reference frequency fn | 50Hz,60Hz |
10 | Power losses in voltage circuit at Un | 50Hz: 1.2W/6VA, 60Hz: 1.0W/5VA |
11 | Power losses in current circuit at 50Hz Un Ib | <0.6VA |
12 | Non-running with no-load | 0.8~1.1Un |
13 | Starting current | 0.5%lb |
14 | Mean temperature coefficient: Form0.1lb to lmax at unity PF Form 0.2lb to lmax at unity 0.5lagging | <0.08%/ <0.12%/ |
15 | Insulation level: Withstanding A.C. voltage for 50Az, 1min Withstanding impulse voltage 1.2/50us | >2kV(when bakelite base>4kV) >6KV(when bakelite base>8kV) |
16 | Rated load speed at unity PF, lb | 13.2r/min |
17 | Rated load torque at unity PF, lb | 450uNm |
18 | Weight of rotor | 24g |
19 | Weight of meter | 1.5~1.6kg |
20 | Meter base | Steel, Aluminum alloy, Bakelite |
21 | Meter cover | ABS, Aluminum, Glass, Bakelite, transparent PC |
22 | Terminal cover | ABS, Bakelite, PC |
23 | Register | Cyclometer single, Unidirectional, Jumping , Metal |
24 | Option | Reverse running stopper, pulse sampling device |
