Digital Surge Arrester Leakage Current Meter (WINFOSS-M7R)

Product Overview

The WINFOSS-M7R digital surge arrester leakage current meter is connected in series in the power grid to record the number of arrester discharge actions and monitor the changes in leakage current in real time. Based on the changes in leakage current, it can promptly determine abnormal conditions caused by internal moisture or mechanical defects during the operation of the arrester, preventing accidents and improving the reliability of the power system.

The WINFOSS-M7R digital surge arrester leakage current meter is designed to achieve remote monitoring in power systems. It uses RS485 bus/LoRa wireless communication to realize digital communication of all station arrester monitors, and interacts data with the remote monitoring platform through the local monitoring IED. The remote monitoring management system evaluates and analyzes the health status of the arrester by combining online monitoring data, offline test data, and equipment defects, achieving real-time online analysis and diagnosis of the arrester's operating status, and formulating equipment maintenance and condition-based maintenance strategies.

l  Digital Surge Arrester Leakage Current Meter: Connected in series in the power grid like a traditional arrester current meter, and connected to the arrester grounding point through the grounding wire to achieve local signal acquisition, local processing, and remote digital transmission. The monitor transmits signals to the IED through the RS485 bus/LoRa wireless communication.

l  IED (optional): Receives and aggregates the digital signals transmitted by the digital surge arrester leakage current meter, and transmits them to the substation online monitoring system or higher-level platform through Modbus or IEC61850.

l  Backend System (optional): Real-time data acquisition, automatic storage of monitoring data, and preservation of data and trend changes for observation by substation operation and maintenance personnel. The monitoring data can be uploaded in real time to the higher-level monitoring center through IEC61850, Modbus, or other communication protocols.

Application Scenarios

l  Mainly used for local online monitoring of the insulation status of GIS body arresters, incoming/outgoing line arresters, and transformer end arresters in substations. It can monitor the full current, lightning strike count, and lightning strike time of arresters in real time.

l  Suitable for monitoring arresters of GIS and transformers with a voltage level of 66kV and above.

l  Applicable to power generation, transmission, substation, and distribution, covering new energy, thermal power, petrochemical, rail transit, metallurgy, nuclear power, and other fields.

Product Features

l  While maintaining the arrester counter function, it also has remote digital monitoring capabilities, in compliance with the requirements of the "DL/T59-1996 Power Equipment Preventive Testing Regulations." It provides technical support for arrester condition evaluation, risk analysis, fault diagnosis, and maintenance strategy decision-making;

l  The digital leakage current meter for arresters adopts an integrated design, with the monitoring module and sampling sensor concentrated in one unit, achieving local sampling, measurement, calculation, and digital transmission of monitoring signals;

l  It has the traditional functions of discharge counting and leakage current indication, and through LoRa wireless communication and RS485 wired communication, it realizes long-distance data transmission, allowing users to conveniently observe the operating status of the arrester from a remote location;

l  The LoRa wireless communication version uses the micro-power wireless network communication protocol for power transmission and transformation equipment IoT, eliminating the need for cable laying;

l  The RS485 bus communication method has higher stability, reliability, and strong anti-interference capability, while also offering strong system expandability;

l  A high-precision clock chip is used for timing, which can accurately save the number of arrester actions and the time of action in the microcontroller, with the function of not losing data after power loss;

l  Suitable for cold, high-altitude, and humid areas: The product's special anti-salt fog treatment process is widely used in high-altitude areas in Tibet, extremely low-temperature areas, and offshore wind power areas with high humidity and salt fog, with stable product operation;

l  It can be connected to the WINFOSS S99 substation integrated online monitoring and diagnosis system through Modbus communication, enabling remote web access to data under a local area network. At the same time, the online monitoring data of the entire station can be integrated into other comprehensive digital platforms.

Technical Parameters

Interface Description

1.      Current Meter Interface Diagram

Wired version 485 signal aviation plug terminal definitions:

Ø  Terminal "1": +12V power supply;

Ø  Terminal "2": Power ground;

Ø  Terminal "3": 485(B);

Ø  Terminal "4": 485(A).

2.      IED Wiring Diagram

a)          Power terminal: Provides AC220 power for the IED.

b)         Power switch: Controls the power on/off of the IED.

c)          Communication indicator light: Indicates the data transmission status of the 4 serial ports/network ports.

d)         4 serial port communications: Connects to the digital leakage current meter for surge arresters.

e)          Communication network port: Transmits data to the backend system.

f)           Debugging network port: Debugs the digital leakage current meter for surge arresters.

Service Assurance

l  On-site training and guidance are provided for a fee, and on-site demonstration operations are conducted.

l  Detailed Chinese instruction manuals and user guides are provided.

l  One-year free warranty, lifetime spare parts support, and maintenance.

l  24/7 hotline available 365 days a year to answer user inquiries.