background image

3

Performance criteria

Operating humidity
Storage humidity
Operating temperature
Storage temperature
International standard
Accuracy class
Protection against penetration
of dust and water
Insulating encased meter of
protective class

2

4

SDM120A/D/DB

Technical Data

1

Safety Instructions

Information for your own safety

This manual does not contain all of the safety measures for operation of 
the equipment(module,device),because special operating conditions,
and local code requirements or regulations may necessitate further 
measures. However, it does contain information which must be read 
for your personal safety and to avoid material damages. This information 
is h i g h l i g h t e d b y a w a r n i n g t r i a n g l e a n d i s represented a s f o l l o w s , 
depending on the degree of potential danger.

Warning

This means that failure to observe the instruction can result in 
death, serious injury or considerable material damage.

Caution

This means hazard of electric shock and failure to take the 
necessary safety precautions will result in death, serious injury 
or considerable material damage.

Qualied personnel

Operation of the equipment (module, device) described in this manual 
may only be performed by qualied personnel. Qualied personnel in 
this manual means person who are authorized to commission, start 
up, ground and label devices, systems and circuits according to safety 
and Regulatory standards.

Use for the intended purpose

The equipment (device, module) may only be used for the application 
specied in the catalogue and the user manual, and only be connected 
with devices and components recommended and approved by EASTRON.

Proper handling

The prerequisites for perfect, reliable operation of the product are proper 
transport, proper storage, installation and assembly, as well as proper 
operation and maintenance. When operating electrical equipment, certain 
parts of this equipment automatically carry dangerous voltages. Improper 
handling can therefore result in serious injuries or material damage.

Use only insulating tools.
Do not connect while circuit is live (hot).
Place the meter only in dry surroundings.
Do not mount the meter in an explosive area or expose the meter 
to dust, mildew and insects.
Make sure the used wires are suitable for the maximum current of 
this meter.
Make sure the AC wires are connected correctly before activating 
the current/voltage to the meter.
Do not connect the meter to a 3 phase - 400VAC - network.
Do not touch the meter connecting clamps directly with your bare 
hands, with metal, blank wire or other material as you may get an 
electrical shock.
Make sure the protection cover is placed after installation.
Installation, maintenance and reparation should only be done by 
qualied personnel.
Never break the seals and open the front cover as this might inuence 
the functionality of the meter, and will avoid any warranty.
Do not drop, or allow physical impact to the meter as there are high 
precision components inside that may break.

≤ 90%
≤ 95%
-25°C - +55°C
-40°C - +70°C
IEC 62053-21
1

IP51

II

Specications

Nominal voltage(Un)
Operational voltage
Insulation capabilities
- AC voltage withstand
- Impulse voltage withstand
Basic current (Ib)
Maximum rated current (Imax)
Starting current
Over current withstand
Operational frequency range
Internal power consumption
Pulse Output

230V
176/276V

4KV for 1 minute
6KV-1.2µS
5A
45A
0.4% Ib
30Imax for 0.01s
50-60Hz
≤ 2W/10VA/phase
1000imp/kWh

Basic errors

0.05Ib Cos

φ

 = 1

0.1Ib Cos

φ

 = 0.5L

Cos

φ

 = 0.8C 

0.1Ib – Imax Cos

φ

 = 1

0.2Ib – Imax Cos

φ

 = 0.5L

                      Cos

φ

 = 0.8C

±1.5%
±1.5%
±1.5%
±1.0%
±1.0%
±1.0%

With balanced loads

With single phase load

0.1Ib – ImaxCos

φ

 = 1

0.2Ib – Imax Cos

φ

 = 0.5L

±2.0%
±2.0%

Dimensions

17

.

5m

m

35mm

6

2

m

m

Height
Width
Depth
Weight 

119mm
17.5mm
62mm
0.1Kg(net)

Foreword

T h a n k y o u f o r p u r c h a s i n g t h e E A S T R O N S D M 1 2 0 S E R I E S D I N r a i l 
single phase two wires energy meter. With the EASTRON product range 
we have provided a large scale of energy meters on the market suitable 
for 230V AC (50Hz). SDM120 series are only 1 module (17.5mm)
w i d t h , e n s u r i n g a h i g h a c c u r a c y c l a s s ( b e t t e r t h a n C l a s s 1 ) , a very low
s t a r t i n g c u r r e n t w h i c h m a k e s i t e x c e p t i o n a l l y s u i t a b l e f o r sub-meteri
-ng system and general use.

JIAXING EASTRON ELECTRONIC INSTRUMENTS CO., LTD.

Add: No.1369 Chengnan Road, Nanhu, Jiaxing, Zhejiang, 314001, China

Tel: +86-573-83698881 /83698882         Fax: +86-573-83698883
Email:[email protected]                 Web:www.eastron.com.cn

!

Single Phase DIN Rail kWh Meter

Отзывы: