NewTrend · single-phase energy metering
Product overview
The DDS238-4 provides local kWh readings in mechanical-counter and LCD configurations. This page groups the three illustrated 100A versions under the same complete model: a 220–230V two-wire mechanical meter, a 110V two-wire LCD meter and a 110/220V three-wire LCD meter. Select the configuration for the circuit before installation.
Technical selection summary
| Model | DDS238-4 |
|---|---|
| Maximum current | 100A; rated current and connection depend on configuration |
| 220–230V mechanical version | Single-phase two-wire; 10(100)A; 50/60Hz; 800imp/kWh |
| 110V LCD version | Single-phase two-wire; 20(100)A; 60Hz; 1600imp/kWh |
| 110/220V LCD version | Single-phase three-wire; 10(100)A; 60Hz; 800imp/kWh |
| Energy accuracy | Class 1 on the illustrated nameplates |
| Mechanical display | Five integer rollers plus one decimal roller; kWh |
| LCD display | Five integer digits plus one decimal digit; kWh |
| Indicators | Energy-pulse LED; power indication on the LCD versions |
| Mounting | 35mm DIN rail; mounting arrangement depends on enclosure |
| 110V / 110–220V LCD enclosure | 75mm width × 88mm height; 73mm overall depth reference |
| LCD outline references | 44mm body-depth reference; 35.5mm rail section; 45mm front section |
220–230V mechanical-counter version
The mechanical version is marked 10(100)A, 220–230V, 50/60Hz and 800imp/kWh. Five black integer rollers and a red decimal roller show accumulated active energy in kWh. The pulse LED provides a visible energy-counting indication. The nameplate carries IEC62053-21 and IEC62052-11 markings.
The terminal photograph shows the phase and neutral paths. Follow the L-IN, L-OUT, N-IN and N-OUT markings molded into the enclosure when connecting the supply and load.
110V two-wire LCD version
The 110V LCD version is marked 20(100)A, 60Hz and 1600imp/kWh. Its clear numeric LCD displays five integer digits and one decimal digit, up to 99999.9kWh. The front LEDs identify power and energy pulses. The illustrated FM1S two-wire arrangement uses L and N.
110/220V three-wire LCD version
The three-wire LCD version is marked 110/220V, 10(100)A, 60Hz and 800imp/kWh. It uses the L1 and L2 positions shown in the connection illustration, with neutral shown separately for the three-wire system. Follow the selected meter’s terminal diagram and the installation requirements.
LCD enclosure dimensions
The illustrated LCD enclosure is 75mm wide and 88mm high. The drawing identifies a 73mm overall depth reference, 44mm body-depth reference, 35.5mm rail section and 45mm front section. These dimensions apply to the illustrated LCD enclosure.
Installation and mounting
Install the meter in a suitable distribution enclosure and isolate the supply before wiring. The rear mounting arrangement shown below belongs to the mechanical enclosure. The LCD version provides DIN-rail mounting and the illustrated flat-mount arrangement. Keep terminal covers secured and choose suitable conductors and upstream protection.
Typical applications
For single-phase consumption monitoring, residential and commercial submetering, equipment energy measurement and local kWh allocation. Match the supply voltage, number of wires, frequency and current rating to the selected configuration.
