The fully automatic SF6 density relay is an intelligent and fully automated verification instrument. The fully automatic SF6 density relay verifier uses single-cycle instruction microcomputer technology, which runs at a speed ten times faster than a regular single-chip microcontroller. It can perform on-site verification of SF6 density relays with pointer contact output and intelligent current output. The instrument uses an interrupt method to capture the action of the density relay in real-time, ensuring more accurate and timely measurements.
In the work of power workers, it is often necessary to test SF6 density relays used for conducting the SF6 monitor. Therefore, an SF6 gas density relay tester is needed. What kind of tests can this equipment perform? This article will provide a brief introduction for you.
1. Verification of SF6 density relay lockout recovery value
Under ambient temperature, when the SF6 density relay is at zero pressure, slowly inflate it at a certain speed. When the lockout relay of the SF6 density relay is actuated, record the pressure value under the current ambient temperature and convert it into the equivalent pressure value at 20℃. This equivalent pressure value at 20℃ is the lockout recovery value of the SF6 density relay.
2. Verification of SF6 density relay alarm recovery value
Continue to slowly inflate the SF6 density relay, a kind of gas density sensor, at a certain speed.
When the alarm relay of the density relay is actuated, record the pressure value under the current ambient temperature and convert it into the equivalent pressure value at 20℃. This equivalent pressure value at 20℃ is the alarm recovery value of the SF6 density relay.
3. Verification of SF6 density relay alarm value
Under ambient temperature, when the pressure inside the SF6 density relay is greater than the alarm recovery value, slowly release the air at a certain speed. When the alarm relay of the SF6 density relay is actuated, record the pressure value under the current ambient temperature and convert it into the equivalent pressure value at 20℃. This equivalent pressure value at 20℃ is the alarm value of the SF6 density relay.
4. Verification of SF6 density relay lockout value
Continue to slowly release the air from the SF6 density relay at a certain speed. When the lockout relay of the density relay is actuated, record the pressure value under the current ambient temperature and convert it into the equivalent pressure value at 20℃. This equivalent pressure value at 20℃ is the lockout value of the SF6 density relay.
The relay verification instrument uses a modular mixed-type single-cycle high-speed single-chip microcomputer as the core, with rich resources, powerful functions, and strong data processing capabilities. Since it integrates the reference voltage and analog amplification into the internal of the single-chip microcomputer, the peripheral circuit is simple, stable, and highly accurate. The SF6 density relay verifier can perform fully automatic verification of both pointer-type and electronic density relays. It is a relatively conventional high-voltage power test equipment, and power workers need to be proficient in its usage methods and which tests can be performed.
