GE GL317D Instruction Manual page 148

SF or SF +CF gas
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Reminder
Parameters
Checking SF or
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SF +CF gas
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SF or SF +CF gas
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humidity level
Checking tightness
of assemblages
under SF or SF +CF
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pressure
10- 2016
Commissioning
Pre- commissioning inspections
SF or SF +CF envelopes are at rated pressure following the SF
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SF +CF gas filling operation.
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NOTE : You are reminded that the gas used to fill the pole must
conform to the requirements laid out in IEC 60376.
Take note of parameters below :
S site altitude, in meters,
S atmospheric pressure of site in kPa,
S site temperature in C.
SF or SF +CF pressure values must obligatorily be read on the pressure
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inspection gauge (tooling). Pay no attention to indications given by the dial
densimeter on the filling control block (where applicable) ; it is not accurate
enough for this inspection.
See the module "Calculation of the SF
to using the pressure gauge (tool)".
The table below gives the steps of checking :
Step
1 Measure SF
pressure by means of the pres-
sure inspection gauge (tooling)
2 Correct pressure found.
The SF or SF +CF humidity level need not be known as the equipment is
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fitted with molecular sieves in sufficient numbers to give a dew point lower
than, or equal to, 0C at an ambient temperature of 20C, for an apparatus
filled to its rated pressure for 2 or 3 months.
Each on site assemblage of parts subjected to SF
seals. The quality of these assemblages must be checked.
This inspection should be undertaken once all the filling and pressure control
operations are finished.
Execute this checking according to instructions given in module "SF
SF +CF gas monitoring".
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GE Information
or SF
6
Action
or SF +CF gas Follow the instructions given in
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module "Filling with SF
SF
Follow the instructions given in
module "Calculation of the SF
or SF
sure to using the pressure
gauge (tool)".
or
6
+CF gas filling pressure
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Comment
+CF gas".
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+CF gas filling pres-
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or SF +CF gas requires
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L34- 011EN/09
or
6
6
or
6
4/6