GE SF6, Instruction Manual

Page: 218 / 300

Grid Solutions
PS 0004EN 04 1996-03-18 2011-03-21 2 / 3
Sheet N° Revision 1st issue Revision date Page
Whilst SF
6
in its pure state is not toxic, the decomposition products have varying degrees of toxicity. They may
irritate the skin, the eyes and the mucous membranes; and in massive amounts may cause serious lesions
(oedema, heart failure, circulatory disorders and unconsciousness).
However, very rapidly and before there is any real danger, signs such as a pungent smell, irritation of the
mucous of the nose, the eyes and the mouth will give a warning and the personnel concerned will have
sufficient time to take the necessary safety actions.
Where the gas is used or handled within enclosed premises, ensure adequate ventilation, especially low down.
If the gas is inhaled, the area concerned must be evacuated immediately.
Under normal operating conditions, leaks are exceptionally minor and not critical, even when the gas contains
impurities (due to the regenerating filters in the circuit breaker).
Filling and where necessary topping up operations must be carried out using the appropriate tools.
During maintenance operations, or at the end of the life-cycle, dust inside the equipment must be removed by
a vacuum extractor and the operator should wear a mask. Gas recovery must be carried out using the
appropriate gas recovery equipment.
Gases and decomposition products must be treated and/or disposed of by specialist organizations.
Under extremely abnormal conditions (e.g. break in the shielding) in an enclosed space, individual protective
equipment is recommended.
Lastly, it is forbidden to smoke, drink, eat or keep food in the vicinity of open SF
6
equipment, whether indoors
or outside (harmful dust).
SAFETY INSTRUCTIONS .
OBSERVE ALL GENERAL INSTRUCTIONS GOVERNING INSTALLATION, COMMISSIONING AND
OPERATION IN ACCORDANCE WITH CURRENTLY ACCEPTED PRACTICES AS WELL AS THOSE LAID
DOWN IN THE DOCUMENTATION SUPPLIED WITH THE EQUIPMENT.
It is essential that both the fitter and the user
read IEC Technical Report 1634 regarding the use and
handling of sulphur hexafluoride gas.