Deskripsi
SF6 Comprehensive Detector
Model : YTDL-H27
MFR : Electric Power Equipment (Shanghai) Co., Ltd
| Introduction: | The instrument displays the SF6 gas purity curve, dew point, humidity, SO2, H2S, and CO values in real time, and tracks changes in gas humidity. This completes three functional tests simultaneously, significantly conserving gas, effectively protecting the environment and reducing pollution, while also reducing user workload and improving work efficiency. The humidity sensor is from Vaisala, Finland; the purity sensor is from HNP, Germany; and the decomposition product sensor is imported from Alpha, UK, specifically for SF6. |
Overview :
The SF6 comprehensive tester (YTDL-H27) can be used to test the purity, humidity, and decomposition products of SF6 gas in equipment. It can also detect SO2, H2S, and CO components in SF6 gas. The SF6 comprehensive tester uses the TCD method for purity testing, the resistance-capacitance method for humidity testing, and the electrochemical sensor method for decomposition product testing. After SF6 gas measurement begins, the instrument automatically determines equilibrium and displays the SF6 gas purity curve, dew point and humidity values, SO2, H2S, and CO values in real time, while also tracking changes in gas humidity. This simultaneous performance of all three functions significantly conserves gas, effectively protects the environment, reduces pollution, and reduces user workload, improving efficiency. Humidity sensors are from Vaisala, Finland; purity sensors are from HNP, Germany; and decomposition product sensors are imported from Alpha, UK, specifically for SF6. Product alternative names: SF6 comprehensive tester, sulfur hexafluoride comprehensive tester, SF6 moisture tester, SF6 decomposition product analyzer, SF6 comprehensive analyzer, SF6 purity tester.
Technical requirements :
( 1) Purity testing. Technical requirements: The purity measurement value is 90% to 100%, and the error does not exceed 0.05%.
(2) Humidity detection. DL/T506-2007 stipulates that the technical requirements for humidity measurement using the mirror method are as follows: When the ambient temperature is 20°C, the dew point measurement range is 0-60°C, and the measurement error does not exceed ±0.6°C.
(3) Detection of decomposition products.
1) Using the principle of electrochemical sensor, it can simultaneously detect the content of SO2, H2S and CO components of SF6 gas in the equipment.
2) The detection range for SO2 and H2S gases should not be less than 100μL/L, and the detection range for CO gas should not be less than 500μL/L.
3) The gas flow rate required for detection should not exceed 300mL/min, and the response time should not exceed 60s.
4) The detector interface can be connected to the gas valve of the equipment and can withstand the gas pressure inside the equipment.
5) It should be used within the validity period of the inspection report and must be inspected every year.
6) Based on performance indicators, detectors are divided into Class A and Class B. Class A detectors are typically used to determine whether equipment has a potential fault by detecting SF6 gas decomposition products in the equipment. Class B detectors are typically used to detect gas decomposition products after equipment failure. The main performance indicators are the instrument’s accuracy and repeatability.
Features :
- Fast measurement: no preheating is required after power on, and dew point saturation is quickly reached
- Portable design: The instrument is lighter, easy to carry and use.
- Fast measurement: No need to wait after the instrument is turned on, it can measure immediately and quickly obtain the purity value, trace water value, and the detection value of each decomposition product
- Fast and gas-saving: The gas consumption during measurement is only about 0.5L (101.2kPa).
- Self-locking joint: Self-locking joint imported from Germany, safe, reliable and leak-free.
- Data storage: large capacity design, can store up to 100 sets of test data.
- Clear display: The LCD screen directly displays the purity value, time and date, battery power, etc.
- RS232 interface: can be connected to a serial printer to print data.
- Built-in power supply: Built-in large-capacity rechargeable lithium battery, which can work continuously for 10 hours on a full charge.
Technical Parameters :
Micro-water parameters
| Parameter Item | Parameter Value |
| Measuring range | Dew point -80～+20℃ (supports PPMV, etc.), dew point accuracy: ±0.4℃ (when the dew point temperature is lower than 0℃, the sensor output is frost point) |
| Dew point accuracy | ±0.4℃ (When the dew point temperature is lower than 0℃, the sensor output is frost point) |
| Response time | 63%〔90%+20- -20℃ Td 5s[45s] |
| Resolution | Dew point 0.1℃ or 0.1PPM |
| Repeatability | ±0.4℃, gas flow SF6 is adjusted to 0.5～0.9L/min |
| Gas flow | SF6 is adjusted to 0.5～0.9L/min |
| Probe protection | Stainless steel sintered filter |
| Measuring range | 0～100% SF6; Accuracy and repeatability: ±0.4%, independent of flow rate; |
| Response time | 90%, 15s |
| Accuracy | ±1ppm |
| Display Mode | Large color LCD display |
| Operating voltage | 220VAC±10%50Hz, AC/DC dual-use, overcharge protection, built-in 3500mAH rechargeable battery |
| Work pressure | 0～1.0MPa |
| Output interface | USB 1.1 Specification |
| Operating Environment | Temperature: -20～+60℃ |
Decomposition parameters :
| project | index |
| Minimum detection amount | 0.1ppm |
| stability | When the temperature changes from 20℃ to 40℃, the zero point drift is ≤±0.1ppm |
| Accuracy | When measuring ≤2ppm, the error is ≤±0.1ppm |
| When measuring >2ppm, the error is ≤±0.2ppm | |
| Measuring range | SO2+SOF2: 0～100μL/L; (0～2000μL/L) |
| H2S: 0～100μL/L | |
| HF: 0-20 μL/L | |
| CO: 0-1000 μL/L | |
| Measurement tolerance | H2S≤10μL/L,±1μL/L; H2S>10μL/L,±10%
CO≤10μL/L,±0.5μL/L;CO>10μL/L,±1.0μL/L |
| Resolution | SO2+SOF2≤0.1μL/L, H2S≤0.1μL/L, |
| CO≤0.5μL/L, HF≤0.1μL/L | |
| Response time | **Not more than 5 minutes |
| pressure | The instrument pipeline can withstand a pressure of no less than 1MPa |
| Temperature range | -40℃~+50℃ |
| Humidity range | ≤95%RH |
| atmospheric pressure | 86kPa~106kPa |
| Inlet pressure | ≤1.0Mpa |
Purity parameters :
| purity | Measuring range | 0%~100% |
| Measurement accuracy | ±0.5% | |
| Measurement time | <2 minutes. | |
| Ambient temperature | -40℃～+60℃ | |
| Ambient humidity | 0～100% RH | |
| power supply | AC 220V | |
| Built-in rechargeable battery | ||
Requirements for measuring moisture content in sulfur hexafluoride circuit breakers
| Test content | Standard (u1/1, 20°C) |
| Sulfur hexafluoride circuit breaker leaving the factory and undergoing overhaul (before overall reassembly)
The moisture values of the breaking unit and the supporting unit should be measured separately. |
≤150 |
| During handover, measure the moisture content of the circuit breaker from the inflation interface at the bottom of the support. | ≤150 |
| During operation, the moisture value of the circuit breaker is measured by the inflation interface at the bottom of the support.
The test cycle shall be in accordance with the “Preliminary Test Procedures”. |
≤200 |
| During operation, if necessary (breaking unit leakage, disassembly of breaking unit), the water content of the breaking gas chamber of the sulfur hexafluoride circuit breaker should be measured separately at the self-sealing joint in the junction box. | ≤300 |
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