Single-Phase Electronic Energy Meter (4P)
Single-phase DIN rail energy meter in 1P, 2P and 4P versions with class B/C active energy accuracy, DL/T645 and MODBUS-RTU support and an optional 4G module.
Overview
Key Features
Accurate bidirectional metering
Class B/C active energy accuracy, forward and reverse measurement, flat error curve.
Multiple communication options
Three protocols over RS485, with a 4G module available.
Multi-tariff time-of-use billing
5 tariffs, 14 time segments and 8 daily tariff tables.
Industrial reliability
Operating range -25℃~+55℃ and altitude up to 4000m.
Full form factor range
1P, 2P and 4P direct-connection versions on 35mm DIN rail.
Secure data retention
Outage data retained for at least 10 years.
Technical Data
| Rated voltage | AC 220V / 230V, 50Hz |
| Accuracy class | Active energy class B (±1.0%/±1.5%) / class C (±0.5%/±1.0%) |
| Communication interface | RS485, DL/T645-2007 / DL/T645-1997 / MODBUS-RTU |
| Wireless communication | 4G module optional |
| Tariffs | 5 tariffs / 14 time segments / 8 daily tariff tables |
| Metering direction | Forward and reverse active energy |
| Power consumption | Voltage circuit ≤2W/10VA; current circuit ≤1VA |
| Operating temperature | -25℃ ~ +55℃ |
| Altitude | ≤ 4000m |
| Data retention | ≥10 years after power loss (new battery); clock accuracy ≤0.5s |
| Mounting | 35mm standard DIN rail, 1P/2P/4P |
| Protection requirement | Must be installed in an enclosure rated IP51 or higher |
Models & Selection
| Parameter | ZSD-11110-R (1P) | ZSD-11110-R (2P) | ZSD-11110-R (4P) |
|---|---|---|---|
| Rated voltage | AC 220V / 230V 50Hz | AC 220V / 230V 50Hz | AC 220V / 230V 50Hz |
| Dimensions | Narrow body | 72×100mm front face | 72×100mm front face |
| Wiring | Bottom-in top-out or top-in bottom-out | Bottom-in top-out or top-in bottom-out | Direct connection |
| Accuracy | Active energy class B / class C | Active energy class B / class C | Active energy class B / class C |
Model naming rule：ZSD-11110-R（1P） ZSD-11110-R（2P） ZSD-11110-R（4P）
Installation
FAQ
How do I choose between the 1P, 2P and 4P versions?
Choose by circuit count and enclosure space: 1P is the narrow body, 2P and 4P have a 72×100mm front face, and the 4P version is direct connection. All share the same accuracy classes.
Which communication protocols are supported?
DL/T645-2007, DL/T645-1997 and MODBUS-RTU are supported over the RS485 interface. An optional 4G module provides cloud upload of the same metering data, and the 1P, 2P and 4P versions share this protocol set.
What accuracy and tariff configuration is available?
Active energy accuracy is class B or class C. Billing supports 5 tariffs, 14 time segments and 8 daily tariff tables, covering forward and reverse active energy metering.
What are the environmental and mounting requirements?
Operating temperature is -25℃~+55℃ and altitude is limited to 4000m. The meter mounts on a 35mm DIN rail and must be installed in an enclosure rated IP51 or higher.
What certification applies and how is pricing provided?
Certification is held through a CE / CMA / CNAS accredited laboratory. Price is quoted per form factor and option; Request a quote with the model code and whether 4G is required.