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SAFERING XT/SAFEPLUS XT
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14. Operation of the switchgear
14.1 Operating conditions
Normal ambient conditions
SafeRing XT/SafePlus XT is generally equipped for
operation / service in normal Indoor & Outdoor conditions in
accordance with IEC 62271-1.
The following limitations apply:
Ambient temperature
• Max. tempe50°C
• Max. temperature (24-hour average) +40°C
• Min. temperature - 25°C
Humidity
• Max. average relative humidity measured over 24 hours
95%
• Max. average relative humidity measured over 1 month
90%
Special conditions
In accordance with IEC 62271-1, the manufacturer and
end-user must agree about special operating conditions
which deviate from operation under normal conditions.
The manufacturer / supplier must be consulted in advance
if especially difficult operating conditions are involved.
When SafeRing XT/SafePlus XT is installed more than 1000
meters above sea level, the atmospheric pressure will be
lower and the overpressure inside the tank will have to be
reduced.
Airfreight
Units / modules transported by airfreight are delivered with
reduced overpressure. For topping up, please see procedure
for replenishment of SF
6
gas.
Application of the X-ray regulations
One of the physical properties of vacuum insulation is the
possibility of X-ray emissions when the contact gap is open.
The specified test performed by the Physikalisch-Technische
Bundesanstalt (PTB) in Braunschweig demonstrates that the
local dosage output of 1 µSv/h at a distance of 10 cm from
the touchable surface is not exceeded when the rated
voltage is applied.
The highlights are as follows:
• Testing of the switching device or the vacuum interupter
to VDE 0671 part 100 or IEC 62271-100 at the relevant
rated power frequency withstand voltage may only
be performed by trained personnel observing the
stipulations of the EU basic standard (Stipulation 96/29/
Euratom of the senate from 13 May 1996 (ABI.L 159 from
29 June 1996)).
• Application of the rated power frequency withstand
voltage specified for the switching device by VDE 0671
part 100 or IEC 62271-100 is completely safe.
• Higher voltages than the rated power frequency
withstand voltage or DC test voltage specified in VDE or
IEC standards must not be applied!
• The containment of the above mentioned local dosage
output with the vacuum interrupter in the open position
is dependent on maintenance of the specified distance
between the contacts (which is automatically ensured
with correct mechanism function and force
transmission).
• Safety clearances must be maintained.
WARNING - CONTROL AND MONITORING THE GAS
SafeRing XT/SafePlus XT is a pressure-sealed system that
normally does not require special inspections. However,
the gas pressure on the manometer should always be
checked prior to operation.
14.2 General warnings and precautions
DANGER!
Do not walk on the top of switchgear units!.
DANGER!
Switchgear operations must be carried out with the
doors closed.
WARNING!
Operations and any type of work must be carried out by
trained and specialized personnel who are familiar with
SafeRing XT/SafePlus XT and follow all the safety
regulations in accordance with the IEC
Standards and other regulations in force, as well as
any local work regulations and instructions.
NOTE
The tools required for installation and maintenance of the switchgear
are specified in the tool list in chapter 20.6.
