Functions and characteristics
Technical Speci cations: • 220-240V Single Phase, kWh meter
• Rated Voltage: 220 volts (+/-30%)
• Rated Current: 5(60)Amps
• CT Inside Diameter: 14mm (about .55 inch)
• Pulse output impulse constant: 1000imp/kWh
• Range of allowable environmental conditions: Pollution Degree 2, Measurement Category III, Altitude rating 2000 meters max. Maximum Temperature Range: -20 Deg. C to 65 Deg. C.
• The equipment is protected throughout by double insulation as indicated by this symbol:
• Accuracy Class: 1 (±1% accurate) (Fig 3) • Rated Frequency: 50Hz/60Hz • Display mode: LCD 5+1: 99999.9kWh
• Start current: 0.4% Ib. (1.0) • Power consumption: ≤8VA ≤0.4W • Voltage 12~27V, current ≤27mA, max lead length: 20m
• Impulse width=90ms, connect pulse counter to terminal 20 and 21
• Outside dimensions: 117.5x55.8x18mm (Fig 1)
Specifications and main parameters
1 Specification & model
type | Class index | Reference voltage Un | Rated current |
DDS3666 | Class 1
| 220V 230V 240V | 5(20)A 5(32)A 5(60)A |
2 .Basic error
Pulse Output: • Terminals 20 and 21 are for pulse output(Fig 1). Pulse rate: 1000 Impulse/kWh. Polarity sensitive. Maximum 27VDC, 27mA. • Red LED on the meter face flashes 1000 times/kWh. 1 flash = 1Wh.
load current | power factor | elementary error（%） | |
Class 1 | Class 2 | ||
0.05Ib | 1.0 | ±1.5 | ±2.5 |
0.1Ib-Imax | 1.0 | ±1.0 | ±2.0 |
0.1Ib | 0.5L(lag) | ±1.5 | ±2.5 |
0.8C(advance) | ±1.5 | － | |
0.2Ib-Imax | 0.5L(lag) | ±1.0 | ±2.0 |
0.8C(advance) | ±1.0 | － | |
Ib is basic current, Imax is maximum current.
3 Starting:
Under conditions of reference voltage,reference frequency and power factor is 1.0, the meter should be able to start and measure the electric energy normally when meter of class 1 is 0.4%Ib and meter of class 2 is 0.5%Ib.
4 Creeping:
Anti-creeper logical design, apply a reference voltage of 1.15 times to the voltage circuit, while there is no current in current circuit, testing output of the meter shall not produce more than one pulse.
5 Power consumption:
≤2W (10VA)
6 Ambient conditions Standard working temperature:
-25℃～55℃Limiting working temperature: -25℃～60℃ Note: limiting working temperature for special requirements: -40℃～70℃
Installation and connection
1 Outline and installation dimension drawing
2 Wiring diagram