Home » Switchgear Component » SF6 Gas Density Meter 60mm Ring Main Unit / Gas Insulated Cabinet Sulfur Hexafluoride Air Pressure Monitoring Alarm Barometer
  • SF6 gas density meter
  • SF6 gas density meter
  • barometer with alarm
SF6 gas density meter
SF6 gas density meter
barometer with alarm

SF6 Gas Density Meter 60mm Ring Main Unit / Gas Insulated Cabinet Sulfur Hexafluoride Air Pressure Monitoring Alarm Barometer

Description

It is used to monitor the density of SF6 gas in airtight containers. It is widely used in medium-voltage switch cabinets and gas-filled cabinets, and is suitable for outdoor harsh external conditions. Small size, specially customized installation interface, convenient and reliable. The pressure interface can be customized according to customer requirements. Multiple switch action contacts can be provided according to user needs.
  • General
  • Working principle
  • Main technical parameters

This product is suitable for monitoring the density of SF6 gas in sealed containers. The gas density value can be displayed on site. When the gas density value reaches the preset value, the contact device will immediately send out an alarm and control signal. The effective execution of inflation, micro water measurement and calibration can be carried out without disassembling the SF6 gas density relay, preventing unnecessary leakage of SF6 gas during the process of inflation, micro water measurement and calibration. Widely used in SF6 insulated combined electrical appliances, circuit breakers, column switches, transformers and transformers and other electrical equipment. Provide solutions for new substations and intelligent transformation of existing substations.

Features

1. The electrical contact switch design realizes accurate, stable and reliable SF6 gas density monitoring function.
2. With temperature compensation, the compensation performance is stable and the detection accuracy is high.
3. On-site display values and output contact signals are not affected by external conditions such as altitude and on-site ambient temperature changes.
4. The core components are imported materials with high precision.
5. It has good seismic performance.
6. With up to three sets of contacts, it can realize various options such as overpressure alarm, double alarm or double lock, and the monitoring is more secure and reliable.
7. Without dismantling the SF6 gas density relay, the SF6 bulk density relay can be filled with water and verified, which is convenient for on-site personnel to measure and replenish the SF6 gas density relay, and avoid the sealing surface and the sealing surface caused by disassembly. Damage to the sealing ring.
8. 304 stainless steel is used to make the sealed shell, which is moisture-proof and anti-corrosion.

 

The automatic calibration density relay meter is composed of a pressure sensing element, a transmission mechanism, a temperature compensation element, an indicating device and other density detection systems, an electrical contact device and a calibration valve.
Using the principle of pressure measurement with temperature compensation, the density detection system is used to measure the pressure value of the SF6 gas in the sealed container corresponding to a certain density value for on-site detection and control, so as to achieve the purpose of monitoring the gas density.
In a sealed container, the SF6 gas pressure value at a certain temperature (20°C) can be regarded as the gas density value at that temperature (20°C). We take the SF6 gas pressure value at 20°C as a representative value of its corresponding density, and use it as a scale value. When the ambient temperature changes, the temperature compensation element compensates the gas pressure change value caused by the temperature change. Therefore, as long as the density of SF6 gas remains unchanged, the indicated value of the density relay also remains unchanged.
When the sealed container is filled with SF6 gas or the gas changes, the pressure-sensing element is displaced, and is converted into an indicated value by the transmission mechanism. When the indicated value changes due to the change of ambient temperature, the compensation and correction are performed by the temperature compensation element. When the density of SF6 gas rises or falls to a certain set value, the electric contact device will send out an alarm or block control signal immediately and reliably to the preset value to ensure the normal and safe operation of electrical equipment.
The SF6 gas density relay automatic calibration device communicates with the SF6 gas density relay gas circuit. When the SF6 gas density relay is in normal working state, the automatic verification device circuit is in a sealed state. When the SF6 gas density relay needs to be supplemented and verified, the gas supplement and verification device is connected to the SF6 gas density relay automatic verification device, and the internal gas circuit is open, and the SF6 gas density relay can be supplemented or verified. test.

1. Working environment: temperature: -30°C~ 60°C, relative humidity: ≤95%PH
2. Protection class: IP65
3. Anti-vibration in working environment: Class 1
4. Impact rating: 30g
5. Leak rate: ≤1×10-9 Pa .m3/s (helium leak detection)
6. Contact type: magnetic-assisted electrical contact switch (80% silver, 20% nickel, 10μm gold plated)
7. Contact electrical parameters: AC: 30VA 380V 1.0A
DC: 30W 220V 1.0A
8. Insulation performance: Insulation resistance: >100MQ (500VDC)
Power frequency withstand voltage: 2000V 45/60HZ.1min

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