1、 Function of three-phase digital ammeter:

Three phase digital ammeter can be used in conjunction with transformers to measure three-phase current parameters in the power grid. It uses digital LED display and has the advantages of high accuracy, strong isolation, stable performance, and anti vibration. It can set PT and CT changes and can directly replace the original pointer three-phase ammeter.

1. Three phase digital ammeter:Equipped with high-performance processing chips and independent measurement chips, it has high measurement accuracy and fast operating speed.
2. Measure three-phase current, CT can be set arbitrarily.
3. Three phase digital ammeter:Adopting LED digital display.
4. Input rated current: AC5A AC1A.

Shanghai YaduThree phase digital ammeter 　　

IIThree phase digital ammeterTECHNICAL INDEX

Accuracy of three-phase digital ammeter: display accuracy of 0.5 level
Display: The display screen is a full four digit LED digital tube display
Three phase digital ammeter input:
Standard input current: AC1A, AC5A (can be set by expanding the range through CT, please specify when ordering)
Current impedance:<20M Ω
Current overload: continuous overload: 1.2 times instantaneous overload: current 10 times (5 seconds)
Frequency: 50, 60HZ ± 10%

Three phase digital ammeter power supply:
Working power supply: AC220V, AC/DC80-265V, AC380V, DC24V, DC48V power supply. Please specify when ordering
Power consumption: ≤ 5VA

Three phase digital ammeter output module:
Pulse output: 2-channel power pulse output, optocoupler relay, constant: 5000imp/Kwh (Kvarh)
Switching output: 2 or 4 switching inputs
Switching output: 2-channel or 4-channel switching output
Analog output: 1-4 channels
Communication interface: RS485 interface MODBUS-RTU protocol, baud rates of 1200, 2400, 4800, 9600 optional

Three phase digital ammeter isolation withstand voltage: input and power>2kV, input and output>1kV, power box output>2kV
Insulation resistance: ≥ 100M Ω
Working conditions for three-phase digital ammeter: ambient temperature: -10~55 ℃, relative humidity ≤ 93%, no corrosive gas field, altitude ≤ 2500m

IIISchematic diagram for selection of three-phase digital ammeter:

Note: "√" represents optional configuration, "J" represents alarm output, "M" represents analog output, "K" represents switch input, "C" represents RS485 communication,
"MC" represents both "M" analog output and "C" RS485 communication, and "KC", "JC", "JM", and "JMC" are the same

　IIIThree phase digital ammeterWiring example diagram

4、 Precautions for wiring three-phase digital ammeter:

The calculation method of collecting data separately for each measurement channel ensures complete consistency and symmetry during use, and it has multiple wiring methods. Suitable for different load forms.

Current input: The standard rated input current is 5A. If it is greater than 5A, an external CT should be used. If other instruments are connected to the CT used, the wiring should be connected in series. Be careful not to reverse the incoming and outgoing lines. Before removing the current input connection of the product, be sure to disconnect the CT primary circuit or short-circuit the secondary circuit.

5、 Three phase digital ammeter auxiliary power supply:

This product has an AC220V power input interface. Please ensure that the provided power supply is suitable for this series of products to prevent damage to the product. When supplying power, Jianyi installs a 1A fuse on the live side. When the power quality is poor, it is recommended to install surge suppressors or power filters in the power circuit to prevent lightning strikes.

6： Three phase digital ammeter function module

The three-phase digital ammeter can provide up to 4 switch inputs and 3 switch outputs; The switch input is used to detect the switch status of external passive switches. The instrument is equipped with a working power supply inside and does not require external power supply. It can be used to monitor information such as fault alarm nodes and the opening and closing switch status of circuit breakers; When the switch is closed, the corresponding position on the instrument panel switch display page is represented by "1", and when the switch is disconnected, the corresponding position on the instrument panel switch display page is represented by "0". The status information can be remotely transmitted through the RS485 communication interface.