1, application overview

High-voltage transmission cable connector due to contact resistance, overload and other factors lead to high temperature is likely to cause insulation aging, triggering power failure or even fire, high-pressure wireless temperature measurement system can not inspect personnel in the field of real-time monitoring of high voltage busbar connector and high voltage switch touch Point temperature, in order to provide effective measures to provide accurate information, will be an important guarantee for the safe operation of power systems, it is widely used in the following areas:

1). Conductive contacts in high-voltage power transmission and distribution system, bus junction temperature detection;

2). High temperature switchgear, transformers , capacitors and other small space temperature monitoring equipment;

3). Circuit breaker operating box, box-type substation, underground cables and other temperature monitoring.

High-voltage wireless temperature monitoring system uses AC220V power supply, with time recording function points, high temperature warning and over-temperature alarm function, and can test data on-site temperature by RS485 communication upload to the background computer for remote monitoring.

2, application scheme diagram

Figure 1. High-temperature wireless receiver block diagram

3, power solutions

The main power supply of the high-pressure wireless temperature receiver adopts JinShengYang AC-DC product LH15-10D0524-02ER2, the main circuit 5V to the LCD screen, the entire button group, all kinds of operation, alarm indicator and communication module and other power supply; LDO step-down 3.3V to the master chip MCU use; auxiliary voltage 24V to the relay power supply, MCU through the wireless transceiver module to receive field signals, and the scene signal analysis, computing, control optocoupler conduction, the relay action to control the external Of the circuit alarm, and then prompt the site staff to deal with anomalies in a timely manner.

The power supply of the communication module is powered by the second generation constant voltage power supply B0505S-1WR2 of Jinshengyang. The product is widely used in RS485, CAN and other communication occasions. It has the advantages of low cost, short self-recovery, wide temperature range and high reliability Sex and other characteristics.

Special attention is given to the design of the EMC as it applies to the high-voltage power supply system. EMC recommendations or specialized EMC filters are required at the front of the power module.

4, power solutions advantages and features

l 5V, 24V integration, reduce customer costs

l Use power dedicated LH15-10D0512-02ER2 power supply, bare metal surge of four

l The second generation of constant voltage power supply, higher reliability

l More advanced EMC modules are available for surge up to ± 4kV / ± 6kV

5, recommended products

1), AC-DC power supply: LH15-10D0512-02ER2

2), DC-DC power supply: B0505S-1WR2

3), EMC filter module: FC-L01D2

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