Over-temperature alarm circuit for transformer

Abstract

An over-temperature alarm circuit for a transformer comprises a current transformer TA1, a current transformer TA2, a thermistor RT, diodes VD1 to VD2, resistors R1 to R4, a capacitor C1, an electrolytic capacitor C2, an operational amplifier IC1, a transistor VT1, a transistor VT2, a loudspeaker BL, a light emitting diode VL, a switch S and a battery GB. The over-temperature alarm circuit can monitor a working environment of the transformer in real time, and when the transformer works in a high temperature environment, the circuit can remind staff that the transformer is at a too high temperature and needs to be cooled, thereby preventing the problem that the transformer is easily damaged due to being in the high temperature environment for a long term.

Description

technical field [0001] The invention relates to a transformer circuit, in particular to an over-temperature alarm circuit for a transformer, and belongs to the technical field of transformer equipment. Background technique [0002] The transformer is a device that uses the principle of electromagnetic induction to change the AC voltage. The main components are the primary coil, the secondary coil and the iron core (magnetic core). The main functions are: voltage transformation, current transformation, impedance transformation, isolation, voltage stabilization (magnetic saturation transformer), etc. According to the use, it can be divided into: power transformers and special transformers (electric furnace transformers, rectifier transformers, power frequency test transformers, voltage regulators, mining transformers, audio transformers, intermediate frequency transformers, high frequency transformers, impact transformers, instrument transformers, electronic transformers , re...

AI Technical Summary

Problems solved by technology

[0004] In view of the problems existing in the above-mentioned prior art, the present invention provides an over-temperature alarm circuit for a transformer, which can monitor a working environment of the transformer in real time, but when working in a high-temperature environment, it can remind the staff that the temperature of the transformer is too high and needs to be Perform cooling treatment to prevent the transformer from being easily damaged due to long-term high temperature environment

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