wir schaffen wissen – heute für morgen paul scherrer institut 4.2.2010 rené künzi safety for...
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Wir schaffen Wissen – heute für morgen
Paul Scherrer Institut
4.2.2010
René Künzi
Safety for equipment & personnel
Electrical Equipment at PSI
X
Plant
Device
(PS)
50kV/16kV 16kV/400V Dist.
UV
Local Power Distribution Electrical Installation PSI Plants
Devices
Experiments
Personnel Safety (Cloths 1)
• Working outside of danger area
– No special requirements, but….
– Long pants
– Closed shoes
Personnel Safety (Cloths 2)
• Working inside of danger area (protection through cover)
– Working cloths Safety class EN 61482-1-2 (ENV 50354) class 1
– Closed shoes
– Leather Gloves (recommended)
– Never work alone!
Personnel Safety (Cloths 3)
• Working inside of danger area (protection through distance, LV Fuse ≤ 200A)
– Working cloths Safety class EN 61482-1-2 (ENV 50354) class 1
– Closed shoes
– Leather Gloves
– Helmet with face shield (case by case)
– Never work alone!
Personnel Safety (Cloths 4)
• Working inside of danger area (protection through distance, LV, Fuse ≥ 200A, MV, HV)
– Working cloths Safety class EN 61482-1-2 (ENV 50354) class 1
– Closed shoes
– Safety Gloves
– Helmet with face shield
– Safety coat EN 61482-1-2 (ENV 50354)
– Never work alone!
Overheating protection (1)
• Water cooling is monitored twice– Detection of low water flow in
outlet– Temperature sensor on
heatsink
• Forced Air cooling needs to be monitored– High failure rate of fans– Direct monitoring with switch in the
airflow– Indirect monitoring with temperature
sensors on heatsink
Overheating protection (2)
• Magnetic Devices (chokes, transformers)
Conservative design withmoderate winding temperatures
Fans must be monitored
Protection against accidental contact (1)
All Power Supply racks are locked!
All hot blank parts must be covered