This product uses the following MODBUS-RTU protocol of the RS485 as the communication interface, convenient and comprehensive monitoring unit (IED) for communication, in core grounding current measurement has the advantages of high measuring precision, large measuring range of current, local storage,communication parameters of flexible configuration and other functions, to meet theconstruction requirements and relevant guidelines for China State Grid Corp onlinemonitoring intelligent substation online monitoring the system needs. Widely used in transformers, reactors and other electrical equipment core / clamps the ground current online monitoring.

Product function:

1, core grounding current real time monitoring

Support the local and remote data monitoring and display the core / clamps the measurement results of grounding current;

2, core grounding current limit alarm

The user can set the iron core and clamp grounding current alarm threshold. When the current overload fashion set will display the alarm information and has alarminformation remote transmission function;

3, the historical data storage, query function

The device can be continuously stored for more than five years of iron coreearthing current data, power down without loss of data. Query device memory of historical data and alarm information;

4, device operating parameters can be configured through MODBUS-RTU communication protocol, the working parameters can be flexibly configured device:

* * * the alarm threshold device clock time communication parameters (baud rateparity bit stop)

* * the data sampling interval read mode (real-time data / historical data)

* address

The main technical indicators:

- working voltage: 12VDC to 24VDC;

- communication interface: RS-485

- grounded current alarm value: the default alarm value of 100mA (the alarm valuecan be set), ultra limited automatic alarm

- measuring accuracy: 0mA ~ 10mA = + 5% 10mA to 10A less than 1%

Current range - Measurement: 0mA ~ 10A

- shell protection grade: IP65

- working environment temperature: -40 degrees C to +70 degrees C

- working environment humidity: less than or equal to 95%

- minimum sampling cycle: 1s (the user can set the sampling period)

- size: length * width * height /230 x 100 x 110 (mm)