6
3.3 Assembly
Close to the main body is module A, which is superimposed
into module B and module C in turn.
Disconnect all power to the meter and equipment that has the meter installed:
1)Disconnect the voltage by disconnecting the fuse on the voltage transformer (PT secondary) or by cutting off
the voltage isolation switch.
2)Short-circuit the secondary output of the current transformer (CT).
3)Disconnect the meter control power supply and any power supply to the module.
4)Confirm that the power has been disconnected using a voltage measuring device of the appropriate measuring
range.
3.4 Engineering Construction Precautions
3.4.1 Voltage input
The input voltage should not exceed 120% of the rated input voltage of the product (100V or 110V or 400V or 690V). Otherwise,
the PT should be used; a 1A fuse must be installed on the voltage input; the wiring method of the product must be set according to the PT
wiring of the product. The wiring method is as follows:
Wiring method
Selection
2 elements
3P3W
3 elements
3P4W
3.4.2 Current input
The standard rated input current is 1A or 5A. It requires the use of an external CT (recommended to use a wiring strip, not directly
connected to the CT, in order to facilitate disassembly); ensure that the input current corresponds to the voltage, the phase sequence is
consistent and the direction is consistent; if There are other meters connected in the CT circuit used, the wiring should be connected in
series.
Before removing the current input connection of the product, be sure to disconnect the CT primary circuit or short the secondary
circuit!
3.4.3
Communication Wiring
The meter provides asynchronous half-duplex RS485 communication interface, using MODBUS-RTU
protocol, various data information can be transmitted on the communication line.Theoretically, up to 128 power meters can be connected
simultaneously on a single line. Communication address of each power meter can be set. When wiring, keep communication lines away
1.
Insert the connection terminal into the module
2. Using a cable with a diameter of 0.2 to 0.3 mm, strip 6
mm from the end of each wire and connect it to the terminal
and insert the wire into the corresponding position of the
connection terminal.
3. The locking torque of the terminal screw is:
0.56~0.79N
·
m.
