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I. System overview

Transformer is an important power equipment, its safe and stable operation will directly affect the normal production and life. At present, the power system from the previous manual inspection outage maintenance to online monitoring state maintenance development. The transformer comprehensive monitoring system includes transformer inlet and outlet joint temperature and oil temperature online monitoring, iron core grounding current online monitoring, cable grounding current online monitoring, load side voltage and current monitoring, light and heavy gas monitoring, video monitoring. It provides data support for the safe and stable operation of transformers, and provides favorable guarantee for the normal production of enterprises.

2. System topology

The system collects transformer inlet and outlet line temperature, operating oil temperature, iron core grounding current, cable sheath grounding current and other data by monitoring the host, and uploads the collected data to the cloud platform through GPRS. The collected data can be viewed in real time via a computer or mobile phone.

Three, technical parameters

Temperature sensor

Working environment: -25~125℃

Temperature range: -20 ~ +120℃

Measurement accuracy: ±0.5℃

Iron core grounded current transmitter

Range 1 ma - 10 a

Resolution of 1 ma

Accuracy ± (5%+1 word)

Protection class IP66

Cable sheath grounding current transmitter

Range 1MA-100A (customizable)

Resolution of 1 ma

Accuracy ± (5%+1 word)

Protection class IP66

Iv. Installation scheme

1. Six wireless temperature sensors are installed at the inlet and outlet of the transformer, and the oil temperature measurement sensor is installed in the oil temperature measurement hole. As shown below:

2, in the transformer core, clip grounding line is equipped with iron core, clip grounding current transmitter

3. Install 3 cable cover grounding current transmitters in the cable grounding box

4. Install video monitoring system

5. Equipment list

Serial number	Name	Quantity	Unit	Price (yuan)	Remarks
1	Industrial computer	1	Taiwan		Selection
2	Monitoring host	1	Taiwan
3	Wireless temperature sensor	6	Only
4	Wireless oil temperature sensor	1	Only
5	Grounded current transmitter with iron core and clamp	2	Only
6	Cable sheath grounding current transmitter	1	Only
7	Load voltage monitoring (lack of phase monitoring)	3	Only
8	Load current monitoring (three-phase unbalance monitoring)	3	Only
9	Network pan-tilt camera	1	Only