The use of the two-way area identifier and the wiring diagram of the station identifier:
Two-way station identifier connection instructions: 
The two-way zone identifier connects one end of the voltage test line to the Ua, Ub, Uc, and Un terminals of the instrument's rear panel by yellow, green, red, and black. Select 5A (connected to the secondary line of CT on transformer outlets A, B, C) or 100A (transformer low-voltage neutral) or 500A (transformer outlet A, B, C) range clamp current transformer; three clamps One end of the table (A, B, C) with the aviation plug corresponds to Ia, Ib, Ic connected to the rear panel, respectively.
Press the clamp to the corresponding position and connect the voltage test lead to the line under test. The specific wiring method is as follows:
Note: When connecting the voltage test line, connect the zero line to the live line first, and the corresponding must be corresponding, otherwise it will affect the measurement accuracy.
4.2 Two-way station identification device boot
Boot into the main interface (as shown above), the first item is the identification of the station area, press 1 or press the up and down keys to move the cursor to the first item and press OK to enter the station identification interface. (Do not release your finger when you press the button, and leave when the interface responds).
Station area identification: used to set the carrier to turn on, off and display the detected current signal;
Current range: used to set the current range and test method;
Station number: set the number of the station area and the number of extensions;
Electric parameter display: display the voltage and current of the measured point;
Polarity discrimination: used to check whether the field wiring is correct or not;
(The current detection requires a one-to-one correspondence between voltage and current)
Signal test: signal test;
Hardware test: hardware test.
4.4 Current detection Press the up and down keys to select the current detection type and the clamp phase range phase current 5A: it means that the receiving current pulse uses 3 5A clamp type current transformers, respectively connected to the secondary side of the current transformer A, B, Phase C. The phase difference of each clamp current transformer should correspond to the voltage phase difference; phase current 500A: refers to the receiving current pulse using three 500A clamp type current transformers, respectively connected to the A, B, C phase of the transformer outlet . The phase difference of each clamp current transformer should correspond to the voltage phase difference; zero sequence current: refers to the zero-sequence current detected by the 100A (or 500A) clamp-shaped current transformer connected to the zero line of the transformer. In the case of inconvenient wiring to the transformer zero line outlet, the 5A clamp meter can also be used to clamp the clamp transformer on the CT secondary side zero sequence current line. After selecting the current detection type and range, press the Back or Enter key to save the settings and exit.
The station user identification instrument adopts the main and extension modes.
The two-way station identifier master is responsible for transmitting power carrier information, detecting current pulse signals, and determining the zone and phase sequence of the extension according to the electrical parameter signal accessed by the host and the detected current pulse signal.
The extension is responsible for receiving the power carrier signal sent by the host, transmitting the pulse current according to the need, and receiving the response information of the host, and the two-way station identifier displays the information returned by the host.
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