This device is applicable for online temperature monitoring of circuit breaker contacts, cable joints, transformers, frequency converters, reactors, and other equipment in 6-35KV high-voltage switch cabinets, as well as for temperature monitoring of other related electrical equipment.

This device is composed of an optical fiber temperature sensor, a temperature measurement host, and a display screen (optional).

The optical fiber sensor consists of three parts: ① optical fiber connector ② optical fiber ③ optical fiber probe, as shown in the figure.

The fluorescent optical fiber temperature probe converts the temperature information of the monitored area into an optical signal and transmits it to the optical fiber temperature transmitter. The probe of the optical fiber sensor is extremely small and can be directly installed at the measurement point. The temperature measurement is accurate and the response is rapid. The tail fiber uses specially made flexible and sturdy optical fibers, which have the advantages of high transmission bandwidth, stable signals, resistance to electromagnetic interference, resistance to bending, resistance to impact, and quick connection. The material of the tail fiber sheath is polytetrafluoroethylene. It has the characteristics of high temperature resistance, aging resistance, corrosion resistance, high insulation, and non-adhesion, and can adapt to harsh usage environments such as high pressure, high temperature, and strong electromagnetic fields.

Technical parameters of the optical fiber sensor:

  The fluorescent optical fiber temperature measurement host is installed in an external or rail-mounted manner. This product has unique technical advantages in temperature measurement under special environments such as high voltage and strong electromagnetic interference. The temperature hotspots detected by the fluorescent optical fiber temperature sensor are not electrically connected to the measurement signal receiving part, enabling long-term high-precision and high-stability operation, significantly expanding the application scope. At the same time, the optical fiber temperature controller effectively eliminates the potential hazards of local excessive temperature rise and overheating of the reactor during operation, which could eventually lead to the burnout and scrapping of the reactor and is not conducive to its safe operation. The optical fiber temperature controller has high accuracy and sensitivity, can withstand high voltage, can be remotely monitored, has a long service life, and is small in size, making the instrument maintenance simple and convenient, and transportation safe. The internal modular integrated design of the host is aesthetically pleasing and reasonable.

Characteristics of the host:

• The fiber optic end probe is attached to the surface of the measured object to measure temperature

• The temperature measurement fiber is immune to electromagnetic field interference

• Resistant to high voltage insulation, fireproof and explosion-proof

• Single-point temperature measurement, digital signal output

• The fiber optic probe has a small diameter and can be customized

• The transmitter is small and easy to install

• Dip switch, allowing direct setting of communication address

Technical parameters of the host:

The display screen is used in conjunction with the fluorescent optical fiber temperature measurement transmitter. It collects the temperature information transmitted by the transmitter through the RS485 communication interface and displays the probe temperature in real time. This liquid crystal display provides a single RS-485 communication interface for connection with the transmitter. Two sets of over-temperature alarm threshold values can be set, and the number of temperature measurement paths can also be configured. 

It is suitable for equipment such as high-voltage switch cabinets, transformers, frequency converters, reactors, etc.

Technical parameters of the display screen：