The Rapidox SF6 MultiGas Analyser:  High Specification SF6 Analyser with Moisture and SO2 Detection Included

New for 2009 the Rapidox SF₆ Multigas analyser.  SF₆ is a man-made gas used in high-voltage switchgear because of its great arc quenching capabilities. Partial discharges and leaks over time eventually cause the SF₆ to decompose into highly corrosive compounds. It is therefore essential to monitor the condition of the SF₆ to protect the equipment from spark damage and corrosion.

The Rapidox SF₆ Multigas analyser is designed for the simultaneous measurement of SF₆ (0-100%), SO₂ (0-100ppm) and dewpoint (-65°C/+20°C). The analyser is designed for controlling and monitoring the quality of SF₆ in gas insulated sub-stations and circuit breakers. The analyser not only measures the SF₆ gas content in air or nitrogen over the full range, but also measures the moisture content of the SF₆ which is essential when monitoring the dielectric strength of the gas. The decomposition products of SF₆ can be identified by analysing the SO₂ content of the gas; this forms from the breakdown of SOF₂ and SOF₄ after an electrical discharge. The analyser incorporates an electrochemical SO₂ sensor to measure ppm levels of sulfur dioxide. All three gases can be monitored and data-logged simultaneously and just a few minutes are required to get a stable reading.

Regular checking of SF₆ gas insulated substations allows fault preventative maintenance programs to be implemented, and increases the life cycle of the SF₆.

The analyser has a gas output nozzle allowing all sampled gas to be recovered and recycled, ensuring that no SF₆ gas is released into the atmosphere (in accordance with the Kyoto agreement).
 

Features

Applications

Continuous gas sampling of SF6 - SO2 - Moisture High precision catharometer for SF6 analysis over the range 0-100% Electrochemical SO2 sensor for trace analysis of contamination gas 0-100ppm Full scale ceramic dew-point sensor for moisture analysis -100°C to +20°C dp (can be displayed in terms of ppmv) Sensor accuracy ± 1% of the full scale Input pressure 0.5 to 10 bar Gas flow rate 0.5 - 1 litre per minute controlled by flow gauge Programmable alarms (low and high condition) with outputs and visual warning. RS232 / RS485, 0-5V or 4-20mA current loop outputs (both user programmable). Windows data logging software with MS-Excel compatible graphing. On-board data-logging facility with over 2000 data points saved and user-configurable.  No PC required Optional sampling hose with DILO self-sealing fittings and DN8 / DN20 couplings Compatible with gas recovery systems such as DILO Optional heavy duty Peli-style travel case available Optional Thermal Printer now available!

Controlling SF6 quality in switches, bus bars & and circuit breakers in Gas Insulated substations (GIS) SF6 insulated devices in power stations Checking for the build up of corrosive decomposition products such as SO2 present in the SF6 Measuring the moisture content of SF6 gas by using a dewpoint analyser Applying a condition based maintenance program (CBM) to extend the life cycle of the SF6 Detecting the presence of leaks and SF6 discharge Indication of arcing and breakdown through the build up of corrosive by-products   Optional DILO compatible SF6 gas recovery system: ensures no SF6 escapes to the atmosphere. Optional Heavy Duty Peli transportation case with space for accessories and fittings Optional 2m DILO sample hose with DN8 and DN20 couplings suitable for most SF6 switchgear applications