When is an SF6 Density Relay Calibrator Needed?

SF6 gas density relays are critical safety components in SF6 circuit breakers, GIS (Gas Insulated Switchgear), and combined electrical equipment. They are primarily used for:

• Monitoring whether the SF6 gas density falls below the alarm/lockout value.
• Preventing insulation performance degradation, equipment malfunction, or false operation due to gas leakage.

Typical scenarios where it is essential to use an SF6 density relay calibrator include:

• Substation preventive testing
  • According to DL/T596 "Preventive Testing Procedures for Power Equipment" requirements,
  • SF6 density relays need to be calibrated regularly
  • To avoid "long-term inactivity → failure at critical moments"
• Before commissioning/after maintenance of SF6 switches
  • New installations, expansions, and renovation projects
  • Confirming the accuracy of alarm and lockout values
• Troubleshooting false alarms/false lockouts during operation
  • Sudden changes in ambient temperature
  • Degradation of the density relay's temperature compensation performance
  • The need for quick on-site determination of "equipment problem or relay problem"
• Remote substations, unmanned stations, and emergency repairs
  • Lack of constant temperature conditions
  • Lack of stable power supply
  • Requiring extremely high portability and intelligence of the calibration equipment

Combined with the attached products (ZXMD-2000 / ZXMD-2001), these devices primarily address 5 major pain points:

• 32-bit microprocessor + high-speed A/D
• Pressure accuracy 0.2 grade, resolution 0.001MPa
• Automatic temperature compensation conversion (core selling point)
• Multiple types of transition connectors, most relays do not need to be disassembled
• Very low gas consumption, environmentally friendly and low cost
• Can test simultaneously:
  • 1 alarm channel
  • 2 lockout channels