DD862 Single Phase Watt-Hour Meter

Detailed Product Description

 

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