Operation Of The Switchgear; Operating Conditions - ABB SafeRing Product Manual

14. OPERATION OF THE SWITCHGEAR

14.1 OPERATING CONDITIONS

Normal ambient conditions
SafeRing / SafePlus is generally equipped for operation/
service in normal indoor conditions in accordance with
IEC 62271-1.
The following limitations apply:
Ambient temperature
Max. temperature
Max. temperature (24-hour average)
Min. temperature
Humidity
Max. average relative humidity
measured over 24 hours
Max. average relative humidity
measured over 1 month
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/SafePlus is installed more than 1500 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 -gas.
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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 results are as follows:
+40°C − Testing of the switching device or the vacuum interrupter to
+35°C VDE 0671 part 100 or IEC 62271-100 at the relevant rated
- 25°C 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)).
95% − Application of the rated power frequency withstand voltage
specified for the switching device by VDE 0671 part 100 or
90% IEC 62271-100 is completely safe.
− Higher voltages than the rated power frequency withstand
voltage or DC test voltage specified in VDE or IEC stan-
dards 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 / SafePlus 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.