DRT-301M User Manual
Shanghai Fengyilong Electronic Co,. Ltd.
www.china-meters.com
Email:[email protected]
021-60975591/ 60975592
circuit should be sized according to local codes and regulations for the amp city of the circuit
breaker or over current device used in the circuit.
An external switch or a circuit-breaker should be installed on the inlet wire, which will be used
as a disconnection device for the meter. And there it is recommended that the switch or
circuit-breaker is near the meter so that it is more convenience for the operator. The switch or
circuit-breaker should comply with the specifications of the buildings electrical design and all
local regulations.
An external fuse or thermal cut-off which will be used as a over current protection device for
the meter must be installed on the supply side wire, and it is recommended that the over
current protection device is near the meter so that it is more convenience for the operator.
The over current protection device should comply with the specifications of the buildings
electrical design and all local regulations.
This meter can be installed indoor directly, or in a meter box which is waterproof outdoor,
subject to local codes and regulations.
To prevent tampering, secure the meter with a padlock or a similar device.
The meter has to be installed against a wall which is fire resistant.
The meter has to be installed in a good ventilated and dry place.
The meter has to be installed in a protection box when placed in dangerous or dusty
environment.
The meter can be installed and used after being tested and sealed with a letter press printing.
The meter can be installed on a 35mm DIN rail or direct on a meter board with screws.
The meter should be installed in an available height so that it is easy to read.
When the meter is installed in an area with frequent surges due to e.q. thunderstorms,
welding machines, inverters etc, protect the meter with Surge Protection Devices
After finishing installation, the meter must be sealed to prevent tampering.
Connection of the wires should be done in accordance with the underneath connection
diagram.
A
、
Direct connect type:
1
2
3
4
8
so
+
-
A
B
5
6
7
9
11
12
13
14
15
16
17
18
C
N
10
485A
485B
1/2
Ia IN/OUT
3/4 Ib IN/OUT
5/6 Ic IN/OUT
7
Neutral wire
8/ 9 Test pulse output contact
10/11 RS485 communication contact
