Download "184.108.40.206 Transformers" (PDF 254KB)
Transformers may be dry-type or liquid filled; mounted on a floor, wall, or roof; and installed with or without vibration isolation.
- Transformers may slide, tilt, overturn, or fall. Vibration isolation hardware may be damaged.
- Internal elements may be damaged by inertial forces.
- Damaged electrical equipment may be cause electrical hazards and fire hazards. Transformer damage may result in power outages and business interruption.
Figure 220.127.116.11-1 Rail mounted transformer slipped off rails at power plant in Port-au-Prince in the 2010 magnitude-7 Haiti Earthquake; only one of six identical transformers was damaged (Photo courtesy of Eduardo Fierro, BFP Engineers).
- Working around electrical equipment can be extremely hazardous. Read the Electrical Danger Warning and Guidelines in Section 6.6.8 of this document before proceeding with any work.
- This type of equipment can be supplied with a structural steel base, shop welded brackets, or predrilled holes for base anchorage. For any new equipment, request items that can be supplied with seismic anchorage details.
- See Section 18.104.22.168 for additional base anchorage details. Refer to Installing Seismic Restraints for Electrical Equipment (FEMA 413) for additional mounting configurations such as wall- and roof-mounting, or vibration isolation as well as general information on seismic anchorage of electrical equipment.