UFC 3-560-01
6 December 2006
Including change 1, 7 December 2006
Figure 7-1. Substation Temporary Grounding
Do not install distant ground clamps
Install ground clamp
close to potential
Bus
transformer
Permanent bonding
lead
Potential
D1<<D2
transformer
Fault
Fault
Permanent ground lead
D1
D2
Nonconductive
ladder
Table 7-3. Substation Protective Grounding Procedures
1
Check validity of permanent equipment grounds.
2
Install a protective ground cable and bond to a grounded structure member or
to a common copper equipment bushing lead for equipment being worked on.
3
Apply personal protective grounds before working within Table 3-1 clearance
distances on substation equipment including:
Bushings
Instrument transformers
Buses
Power transformers
Capacitors
Switches
Circuit breakers
Surge arrestors
7-4
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