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ZMJ60XD Density Monitors

ZMJ60XD Density Monitors are used to monitor SF6  gas density in sealed tanks. They are applied to indicate the gas density and to provide signal outputs when the den- sity reaches the set values. They are designed to monitor High Voltage systems. They can provide multiple solu- tions to support new substations and the renovation and upgrading of existing substations.

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    SF6 Gas Insulated Switchgear (GIS)
    SF6 Insulated Circuit Breakers
    SF6 Insulated Pole-Mounted Switch
    SF6 Insulated Transformers
    SF6 Insulated Current Transformers or Voltage Transformers
    SF6 Insulated Busbar Systems

    Higher accuracy from reference chamber temperature compensation technology.
    Suitable for indoor or outdoor installation.
    Micro-switch that can switch freely between normally open and normally closed points.
    Up to 4 pairs of switches, multiple options such as double alarms and double locks can be realized, mak- ing monitoring more secure and reliable.
    High shock resistance.
    No need to fill oil, no oil leakage risk.
    Normally closed contacts will not falsely alarm due to vibration.

    Scale range

    -0.1 ~ 0.9MPa

    Accuracy of set point

    ±10 KPa @-30℃~ +60℃(gas phase)

    Accuracy of indicator

    Within the range of the dial ±10 KPa @20℃ ±1℃

    Degree of protection

    IP65

    Ambient conditions

    -20℃ to+60℃, relative humidity ≤ 95%RH

    Leakage rate

    ≤ 1×10-9 Pa-m3/s (Helium leakage inspection)

    Process connection

    M20×1.5 (customizable)

    Installation method

    Radial or Axial

    Electrical connection

    Pluggable connector,

    wire diameter 0.2~ 2.5mm2

    Insulation properties

    Insulation resistance: > 100 MΩ (DC 500V )

    Withstand voltage: 2kV, 50/60 Hz, 1min

    Contact type

    Microswitch

    Impact rating

    50g

    Contact electrical parameters

    10(1.5)A,250V AC

    0.1(0.05)A,250V DC

    Window glass

    Laminated safety glass

    Weight

    ≈ 1.0kg

    Pressure element

    Bellow

    Wider temperature range: -40°~ +60℃
    Measuring Medium:SF6, Air, N2, SF6 + N2 and other gases

    Electrical Safety Essential: Specifications for Setting Up an SF6 Gas Density Monitor

    Necessity of SF6 Gas Density Monitors
    ·Environmental Protection: With the severe situation of global climate change, reducing greenhouse gas emissions has become an international consensus. SF6, as a potent greenhouse gas, poses a significant environmental threat once leaked. Utilizing SF6 gas density monitors can detect leaks timely, allowing effective measures to be taken to mitigate negative environmental impacts.
    ·Equipment Safety: SF6 gas leakage compromises the insulating performance of equipment, increasing the likelihood of equipment failure. By regularly monitoring gas concentrations using SF6 gas density monitors, equipment failures can be effectively prevented, ensuring the safe and stable operation of the power system.
    ·Regulatory Requirements: Many countries and regions have established strict regulations regarding the use and emission of SF6 gas. Compliant installation of SF6 gas density monitors is both an environmental responsibility and a mandatory legal requirement.

    Standardized Installation of SF6 Gas Density Monitors
    ·Site Selection and Layout: When installing SF6 gas density monitors, they should be placed at critical points within the equipment's operational environment where gas leaks are likely to occur, such as joints, valves, and seals of gas-insulated equipment. Additionally, considerations of gas flow direction and environmental ventilation should be made to ensure the monitors can promptly capture gas concentration changes.
    ·Choice of Detection Technology: The current market offers a variety of sulfur hexafluoride gas detection technologies, including infrared spectroscopy, gas chromatography, and electrochemical sensors. The most suitable detection technology should be selected based on actual needs, detection accuracy, and budget. Furthermore, the detection devices must possess high sensitivity and stability to ensure accurate and reliable results.
    ·Regular Calibration and Maintenance: To ensure the long-term stable operation of SF6 gas density monitors, regular calibration and maintenance are indispensable. A detailed maintenance plan should be developed, including timely calibration, cleaning, and inspection of the detection equipment to keep it in good working condition.
    ·Data Monitoring and Recording: SF6 gas density monitors are generally equipped with data collection and monitoring systems to real-time monitor gas concentration changes and store data. By establishing a complete data monitoring system, gas leaks can be quickly alerted, providing a solid basis for subsequent analysis and decision-making.
    ·Personnel Training and Emergency Plans: Specialized training should be conducted for personnel operating and maintaining SF6 gas density monitors to ensure they proficiently master device usage and maintenance skills. Additionally, emergency plans should be developed so that in case of gas leaks, swift responses can ensure the safety of personnel and equipment.
    Standardized installation of SF6 gas density monitors is a crucial step in ensuring electrical safety and environmental protection. Through appropriate site selection, suitable technology choice, regular maintenance, and effective data monitoring, the risk of SF6 gas leakage can be significantly reduced, guaranteeing the safe and stable operation of the power system. With continuous technological advancements, more advanced gas detection technologies and equipment are expected to emerge in the future, providing stronger support for electrical safety management.

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