Product Overview
The SF6 Gas Density Relay Calibration Instrument employs high-precision pressure sensors and high-speed A/D converters. Combined with a 32-bit high-performance microprocessor, it performs performance verification on various SF6 gas density relays. It accurately measures pressure values at the current temperature during signal actuation, automatically converts standard pressure at 20°C for any ambient temperature, and features printing, storage, and USB flash drive transfer capabilities. Additionally, it automatically identifies faults during the testing process.
Applications Description
1. Electrical Substations & Switchyards:Calibration of SF6 density relays in circuit breakers, disconnect switches, and gas-insulated switchgear (GIS).
2.Power Transmission & Distribution Networks:Maintenance of high-voltage equipment (e.g., 66kV–800kV circuit breakers) reliant on SF6 gas.
3.Railway Electrification Systems:Testing SF6 relays in traction power systems and railway substations.
4. Industrial Power Plants & Manufacturing Facilities:Calibrating SF6 relays in critical circuit breakers protecting heavy machinery (e.g., steel mills, data centers).
5. Wind and Solar Farms:Servicing SF6 breakers in renewable energy substations.
6.Gas-Insulated Substations (GIS):Precision calibration of density monitors in compact GIS installations.
7. Maintenance and Service Companies:On-site or workshop-based calibration services for utility clients.
Key Features & Advantages
1. High test accuracy
2. Highly intelligent:Automatically completes pressure measurement and conversion to equivalent pressure at 20°C
4. Friendly man-machine interface:Simultaneously test one set of alarm signals and two sets of interlock signals.
5. Supporting transition joints
6. Less air consumption
7. Support data storage
8. Support printing
9. U disk transfer
10. Easy to carry
11. Powerful PC software
Technical Specifications
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Measurement accuracy |
0.2 F·S |
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Pressure display resolution |
0.001MPa |
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Pressure measurement range |
0~0.99MPa |
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Temperature measurement range |
-20℃~80℃ |
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Temperature measurement error |
±0.5℃ |
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SF6 gas emissions |
Very little SF6 gas emissions are emitted during the entire calibration process |
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How it is displayed |
Industrial-grade 7-inch full-color high-definition LCD screen, while displaying the measured pressure value and the equivalent pressure value at 20°C |
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Mode of operation |
Touch screen |
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How to print |
Array printing |
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Data storage |
Up to 1000 measurement data can be stored |
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Working power supply |
24V lithium battery power supply |
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Power consumption of the whole machine |
≤20W |
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Main unit dimensions/weight |
400×320×160(mm3)/ 6.2kg |
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Accessory box size/weight |
400×370×200(mm3) / 4.8kg |
product Details
Figure1: Panel Structure
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1.Air inlet |
2.Air outlet |
3.Pressure gauge |
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4. Measurement port |
5.Signal interface |
6.Temperature sensor |
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7.Micro printer |
8.Power socket |
9. Power switch |
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10. Air release button |
11.Reset button |
12.Rotary mouse |
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13.USB port |
14.Contrast adjustment |
15.LCD display |
Rotary Mouse User Guide
The rotary mouse functions similarly to a computer mouse, offering three operations: "Left Rotation," "Right Rotation," and "Press to Select." These three actions enable cursor movement, data input, and operation selection.
Cursor Movement: Rotate the mouse left or right to move the cursor. Position the cursor over the desired option and press the knob to select it.
Data Input: When modifying or entering data, position the cursor over the relevant option. Press the mouse to enter either the hundreds or tens digit modification mode (the cursor shrinks to the digit being modified). Rotate the mouse left or right to increase or decrease the value in that digit. Press the mouse to confirm the modification and advance to the next digit. Again, rotate the mouse left or right to increase or decrease that digit. After completing digit-by-digit modifications, the cursor expands to full size, indicating exit from data modification mode. At this point, rotate the mouse to move the cursor away.
Wiring Method
When performing on-site calibration of SF6 density relays, connect the gas lines and electrical circuits using the instrument accessories as shown in Figure 2. Connect the inlet tube to the instrument inlet and the gas cylinder, connect the exhaust tube to the exhaust port, and connect the measurement tube to the instrument measurement port. Then connect to the SF6 density relay under test via the common connector and transition connector. Refer to Appendix II for the common connector and transition connector. Connect the six-core test leads to the corresponding test points on the wiring cabinet. Based on the test objective, connect one end of the supplied six-core test leads to the signal interface on the instrument panel. The end with alligator clips should be connected to the signal sockets on the wiring cabinet of the density relay according to the test signal. Any unused alligator clips must remain idle and should not come into contact with other alligator clips. When testing a single signal (either Single Alarm, Single Lockout 1, or Single Lockout 2), connect only the corresponding test signal and select "Single Signal" on the operation interface. The system will automatically recognize it.
Figure2:Density Relay Calibration Wiring Diagram
Maintenance & FAQs
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