At the end of the 1980s, when the platinum thermal resistance temperature control system first appeared, it was an ordinary electronic circuit, a non-intelligent structure, and a single function, with only display and thermal protection functions. Later, in order to realize remote display and control of temperature signals, 4 ~ 20mA current output was added to the temperature control system, so that the temperature control system has the function of a temperature transmitter, and simultaneously outputs the temperature signal during temperature measurement.
In the early 90's, most electronic instrument products were upgraded with microelectronic technology. Its technical characteristics are to increase the reliability of the product while enriching the instrument functions. The temperature control system of refinery furnace transformers has also developed along with this trend. Many thermostat manufacturers have developed XMT series single-chip microcomputer intelligent temperature control systems.
The application field of refining furnace transformers is constantly expanding, and the functions of temperature control systems have been continuously improved. On the basis of the original function, there are functions such as sound and light alarm, manual fan operation, manual muffler, manual trip, and "black box". With the development of the power industry, the design level of the temperature control system has been improved and improved accordingly. The first three types of temperature control systems have been gradually phased out, and platinum thermistor temperature control systems have been greatly developed.
Subsequently, in order to further improve the operation and management level of the power system, a temperature control system with a computer communication interface appeared, enabling the temperature control system to communicate with an external monitoring system. With the development of communication technology, the interface was first used to output information to the data processing system, but due to some conditions, it was gradually replaced by an interface with a simple structure, easy implementation and easy maintenance. At present, the temperature control system of most precision welding furnace transformers can transmit the three-phase patrol display temperature value, operating status information and set special temperature values to the monitoring center through the communication interface. The monitoring center can also set the temperature of the temperature control system. to modify.
The development of the refinery furnace transformer temperature control system has led to the development of other transformers. The intermediate frequency furnace transformer is the most obvious. The development path is extremely broad and the market prospect is very optimistic.