25 Year OEM,ODM$OBM Special Circuit Break Manufactory In China
  jack_yuanky          jack_yuanky
Fax: 0086-577-62652370
Tel: 0086-577-62652939



Model EM021AA two phase three wire electronic DIN rail active energy meter is a kind of new style two phase three wire active energy meter, it adopt micro-electronics technique, and imported large scale integrate circuit, use advanced technique of digital and SMT techniques, etc. The meter completely accord with relevant technical requirements of class 1 three phase active energy meter stipulated in international standard IEC 62053-21. It can accurate and directly measure 50Hz or 60Hz active energy consumption from two phase three wire AC electricity net. This meter has seven digits LCD displays shows the active energy consumption. And there are far infrared and RS485 communication module in it. Contact with all kind of AMR system conveniently It has following features: good reliability, small volume, light weight, specious nice appearance, convenient installation, etc. This meter has already got the patent certificate from China State Intellectual Property Office at present. Patent certificate NO. ZL 2006 3 0107349.1, any other country patent certificate are in assessing.

Functions and features
● 35mm standard DIN rail installation, complying with standard DIN EN50022. Or front board installed (mounting holes center distance 63 mm), users can choose any one by themselves.
● Ten pole width (Modulus 12.5mm), complying with standard JB/T7121-1993.
● Type S wiring (Inlet from bottom, outlet from top), use CT connect operation, may select set 27 ratio, after set the meter will direct reading when read, and haven’t multiplied by rate of CT.
● Seven digits display LCD, 5+2 digits display (99999.91 kWh, only ratio of CT when 5:5 A) or 7digits, it is choose by ratio of CT which is set.
● There are a polarity port of pulse output passive closed and a no polarity port of pulse output passive distant (the output rate is 10 kWh/pulse), ). Complying with standard IEC 62053-31 and DIN 43864.
● Standard configuration there are a port of far infrared data communication and a port of RS485 data communication. Communication agreement complying with standard DL/T645-1997, can also choose without function of data communication. (Product Configuration code is NA).
● Five LED instructions respectively power supply state (phase voltage L1 & L3), signal of closed energy impulse and distant energy impulse and data communication state.
● Automatic detection the direction of the flow of load current. And instructions on individual LCD
● Single direction two components measure two phase three wire active energy consumption. It is nothing with direction of the flow of load current. Complying with standard IEC 62053-21.
● Standard configuration short terminals cover, may select extension terminals cover, in order to protect to use safety. (Product Configuration code is AD).

Technical parameters



voltage (V)

specifications (A)

current (A)



Class 1

2 x 127
2 x 230

CT/ 5A


AC voltage 4kV for 1 minute,
1.2/50us waveform
impulse voltage 6kV

*If you need different reference voltage or current specification, please advisory our sales.

Outer and mount dimension

Wiring diagram (Type S)



L1 L1 phase CT
L2 Don't use
L3 L3 phase CT
  (Inlet from bottom, outlet from top)
7 and 8 Port of pulse output passive closed
3 and 4 Port of pulse output passive distant
9 L1 phase line
11 Neutral line
13 L3 phase line
N Don't use 
5 and 6 Port of RS485 data communication
1 and 2 Port of CT ratio which is set