Online sampling and verifying gas density relay with protection function
A density relay, gas density technology, applied in the field of electric power, can solve problems such as hazards, potential safety hazards, flashovers, etc.
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Embodiment 1
[0155] figure 1 It is a schematic diagram of a control circuit of an on-line sampling and verification gas density relay with protection function of the high-voltage electrical equipment in Embodiment 1 of the present invention.
[0156] Such as figure 1 As shown, an online sampling calibration gas density relay with protection function includes: gas density relay body 1, pressure sensor 2, temperature sensor 3, valve 4, pressure adjustment mechanism 5, online calibration contact signal sampling unit 6 and Intelligent control unit7. One end of the valve 4 is provided with an interface connected with electrical equipment, and the other end of the valve 4 is connected with the gas density relay body 1; the gas path of the pressure regulating mechanism 5 is connected with the gas density relay body 1. The body 1 is connected; the pressure regulating mechanism 5 is configured to adjust the pressure rise and fall of the gas density relay body 1, so that the gas density relay body...
Embodiment 2
[0166] Such as figure 2 As shown, the online verification contact signal sampling unit 6 is provided with a contact sampling circuit. In this embodiment, the contact sampling circuit includes a photocoupler OC1 and a resistor R1, the photocoupler OC1 includes a light emitting diode and a phototransistor; the anode of the light emitting diode and the gas density relay body 1 Contact P J Form a closed loop in series; the emitter of the phototransistor is grounded; the collector of the phototransistor is connected to the intelligent control unit 7 as the output terminal out6 of the online verification contact signal sampling unit 6, and the collection of the phototransistor The electrodes are also connected to the power supply through the resistor R1.
[0167] Through the above contact sampling circuit, it is convenient to know the contact P of the gas density relay body 1 J is open or closed. Specifically, when the joint P J When closed, the closed circuit is energized, th...
Embodiment 3
[0171] Such as image 3 As shown, the online verification contact signal sampling unit 6 is provided with a contact sampling circuit. In this embodiment, the contact sampling circuit includes a first optocoupler OC1 and a second optocoupler OC2.
[0172] The light-emitting diodes of the first photocoupler OC1 and the light-emitting diodes of the second photocoupler OC2 are respectively connected in parallel through current-limiting resistors, and after being connected in parallel, they are connected in series with the contacts of the gas density relay body to form a closed loop, and the first The connection direction of the light-emitting diode of a photocoupler OC1 and the second photocoupler OC2 is opposite; the collector of the phototransistor of the first photocoupler OC1 and the collector of the phototransistor of the second photocoupler OC2 The electrodes are all connected to the power supply through a voltage dividing resistor, and the emitter of the phototransistor of ...
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