Product Overview
MOEORW-WQT90 is a dedicated calibrator developed for SF6 and SF6-N₂ mixed gas density relays, complying with TCEC 410-2020 mixed gas calibration specification. The instrument integrates mixed gas proportion setting module, supporting calibration of pure SF6 and arbitrary ratio SF6/N₂ hybrid density controllers widely used in new energy power equipment. Equipped with 800×600 high-resolution touch screen and complete test modules including contact action verification, indication error detection and contact resistance measurement, it automatically converts measured pressure to standard value at 20°C under mixed gas medium, with lightweight split host-accessory design for mobile field testing. It supports multi-type pressure mode switching and full data storage, printing and U disk export functions.
Technical Parameters
|
Item |
Specification |
|
Display Interface |
800×600 color resistive touch LCD |
|
Measurement Precision |
Class 0.15 |
|
Pressure Test Range |
0 ~ 1.0 MPa, resolution: 0.0001 MPa |
|
Temperature Test Range |
-50°C ~ 100°C, precision ±0.5°C, resolution 0.1°C |
|
Supported Test Medium |
Pure SF6, arbitrary proportion SF6/N₂ mixed gas, N₂, dry air |
|
Supported Contact Signals |
Dual alarm, dual lockout, overpressure contact arbitrary combination |
|
Print Output |
Chinese standard thermal test report |
|
Power Supply Mode |
Built-in lithium battery / AC 220 V 50 Hz mains |
|
Total Power Consumption |
10 W |
|
Host Dimension |
380 × 320 × 180 mm |
|
Accessory Box Dimension |
465 × 370 × 145 mm |
|
Net Weight |
2.5 kg |
Main Functional Features
1.Hardware & Structural Design Independent intake, test and exhaust gas ports, dedicated temperature sensor and multi-channel signal acquisition terminals; mixed gas ratio input module embedded in parameter setting page; six-core multi-function test wire compatible with all common density relay contact terminals; USB interface supports offline data export and device parameter backup.
2.Core Performance Advantages Exclusive mixed gas pressure conversion algorithm compliant with TCEC 410-2020; four pressure type calibration modes (relative / absolute pressure); three indication calibration modes for density relays; automatic recording of inflation upper limit, deflation lower limit, contact up-cut and down-cut P20 values, one-click calculation of switching difference and indication error; 1/2/3 repeated test cycles with automatic average value output.
3.On-Site Application Value Specialized for new energy equipment adopting SF6-N₂ mixed gas insulation medium, filling the gap of universal calibrators unable to identify mixed gas density characteristics; lightweight split design reduces field transportation burden; complete pipeline exhaust protection logic prevents high-pressure gas ejection during disassembly; all test records contain gas ratio parameters for full test traceability of mixed gas equipment.
Application Fields
1.New energy power stations (wind, photovoltaic) equipped with SF6/N₂ mixed gas GIS and circuit breakers
2.Electrical manufacturers producing mixed gas insulated high-voltage switchgear
3.Metrology institutions undertaking mixed gas density relay metrological verification business
4.Urban rail transit, data center internal high-voltage power distribution equipment maintenance teams
5.Power grid new equipment acceptance inspection departments
Applicable Standards
1.DL/T 259-2012 Calibration Regulation for SF6 Gas Density Relays
2.DL/T 596-2021 Preventive Test Code for Power Equipment
3.JJG 1073-2011 Verification Regulation of Pressure-Type SF6 Gas Density Controllers
4.GB/T 22065-2008 Pressure-Type SF6 Gas Density Controllers
5.TCEC 410-2020 Technical Specification for SF6/N₂ Mixed Gas Density Relay Calibration Device
FAQ
Q: How to set the mixed gas proportion before calibration?
A: Enter density relay parameter setting page, input actual SF6 and N₂ volume percentage according to equipment nameplate before starting test.
Q: Can pure nitrogen be used to calibrate mixed gas density relays?
A: Yes, set gas proportion to 0% SF6 and 100% N₂ in parameter configuration interface.
Q: What operation is forbidden during the test inflation process?
A: Do not activate the quick exhaust port, which will cause unstable pressure and invalid contact test data.
Q: What is the minimum intake pressure of external gas cylinder for normal test?
A: Gas cylinder internal pressure shall not be lower than 1 MPa; refill gas if below the threshold.
Q: How to delete single invalid historical test record?
A: Enter "Historical Data" interface, select target record, click "Delete" button; "Format" button will erase all stored data.
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