The below pictures depict problems
after a plant fire and
demonstrate SRE's solutions to correct and prevent future issues.
(Summary is located at the bottom of the page)
The above picture demonstrates a 12 kV cable
fault explosion in an electrical cabinet which resulted in deformed
metal covers (Image A). The fire detection system recorded two
simultaneous events; one arc blast on the 1st floor in the electrical
cabinet, and a second arc blast in the basement as a result of joint
failure (Image B). *Fire modeling had predicted this substation to
be a high risk station, therefore fire protection enhancements had been
installed prior to this event taking place.
The above shows how residual heat from the fire, vaporized
and bolts securing cables
to the plate of the bus bar.
The above picture demonstrates the charring
of cable jacketing resulting from a fire in the room below. The
material which had been installed was not dislodged, even though
the arc blast was strong enough to deform the steel cabinet. In
addition, the SRE firestop at the bottom of the cabinet kept the fire contained preventing
The picture on the left demonstrates the firestop in
the floor opening taken 6 months prior to the cable fault resulting in
the fire. The picture on the right was taken 8 hours after the
fire and demonstrates the seal remains in "as new" condition with no
degradation after explosion and 45 minutes of water spray exposure.
Power Cable Wrap
SRE had installed the Cable Wrap on the
joint and adjacent power cables. The dark areas identify where the
cable wrap absorbed energy from joint failure, helping to protect
underlying power cables. Adjacent control cables were also covered
protecting other underlying cables from direct arc blast. Control
cable protection maintained through 45 minutes of sprinkler actuation
which were located directly above the cables. In addition, SRE's
fabric allowed clean water to flow through the fire resistant weave.
The basement had a 1.5 foot depth of water when the sprinkles were
Control Cable Wrap
Control Cable Wrap protected several control cables from direct arc
blast exposure during the fire.
3 out of 4 Fortifire™
System components were activated and
helped mitigate damage caused by example cable faults:
1. SRE Firestopping contained the
fire to the inside of the electrical cabinet.
2. SRE Power Cable Wrap protected
adjacent power cables from impact of joint failure
3. SRE Control Cable Wrap protected
several control cables from direct arc blast exposure.