GE SF6 Instruction Manual page 37

Densimeter
Function
Localization
Working
07- 2016
Description and operation
SF gas monitoring
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D Permanent SF gas density monitoring.
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D Visual SF gas real pressure information (MPa - psi).
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The densimeter is situated onto the bottom of the pole of the circuit- breaker,
and joined to the gas volume of the circuit- breaker.
The densimeter is fitted with internal contacts. These contacts close success-
ively if the gas's density diminishes and determine 2 distinct thresholds.
These contacts are wired to the terminal block inside the cubicle and are usu-
ally left at the user's disposal for the following use :
D Alarm pressure "p " acts as a warning (topping up necessary).
ae
D Minimum functional pressure for insulation "p
lock the circuit- breaker in position or to cause automatic opening. The option
is chosen by the client in keeping with operating requirements.
All the circuit- breaker's rated performances are guaranteed up to the min-
imum specified ambient temperature and the minimum functional pressure
for insulation "p ".
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GE Information
" must be used either to
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