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HAZARD ANALYSIS HIGH VOLTAGE & LOW CURRENT TEST ELECTRONICS RACKS RGF Sept99
HAZARD ANALYSIS HIGH VOLTAGE & LOW CURRENT TEST ELECTRONICS RACKS
Description of Work: High-voltage (> 600V AC or DC), Low-current (< 10 amps operating, or < 50
amps capability) Power supplies can be found in system test racks in the ESE Department. An example
is providing gain voltage to Photomultiplier tubes or providing bias voltages to silicon detectors.
Installation and use of these supplies presents the following safety hazards.
Step/Pha
se of
Job
Safety Hazard
Precautions/Safety Procedures
Installation
Muscle and joint
strain, pinch, cut, and
smash hazard
Use safe lifting methods including mechanical assistance, co-
worker assistance, and correct posture. Evaluate need for
personal protection equipment (PPE) for hands & face.
Installation
Electrical hazards
including fire and
welding
Ensure the power supply is disconnected from the mains.
Measure the output connection voltage to confirm that no
residual energy is stored within the module.
Installation
Heat and fire hazards.
Ensure the high voltage cable is appropriate for the task. Assure
the connectors breakdown voltage is greater than the highest
output voltage.
Insure the cable is sized correctly for the conductor to safely
carry at least the fault voltage needed to trip safety devices.
Ensure the break-down voltage of the cable insulation is greater
than the highest output voltage of the supply. Assure the cable
jacket is sufficiently rugged for the task. Verify the high voltage
connections are secure and will not easily become loose.
During Use
Electrical hazards
including fire and
welding.
Regularly check that the high voltage connections at both the
supply and the load are secure and have not become loose.
Regularly check the physical integrity of the cables and the
connectors, replacing any with signs of excessive wear or of
arcing. Regularly check the current output of the supply,
checking that the current output from the supply is not leaking
through the cable.
After Use
Electrical hazards
including shock
Confirm that no residual energy is stored within the module by
measuring the output connection voltage. If necessary, use a
grounding stick to discharge the stored energy along a known
current path.
.
Accepted: _______________________________
Date: _____________
Supervisor/Task Manager RGF Sept99
My supervisor has reviewed this hazard analysis with me and I
understand the hazards and required precautionary actions. I will
follow the requirements of this hazard analysis or notify my
supervisor if I am unable to do so.
Name (please print)
Signature
Date