11
instruction books. These procedures
normally consist of removing the
normally consist of removing the
SF
6
from
the circuit breaker, filtering and storing it
in a gas cart as a liquid, and transferring
it back to the circuit breaker after the
circuit breaker maintenance has been
performed. No special dress or
precautions are required when handling
nonfaulted SF
in a gas cart as a liquid, and transferring
it back to the circuit breaker after the
circuit breaker maintenance has been
performed. No special dress or
precautions are required when handling
nonfaulted SF
6
.
6.3.
HANDLING FAULTED SF
6
.-
6.3.1 Toxicity.-
a. Faulted
SF
6
gas.- Faulted SF
6
gas smells like rotten eggs and
can cause nausea and minor
irritation of the eyes and upper
respiratory tract. Normally, faulted
can cause nausea and minor
irritation of the eyes and upper
respiratory tract. Normally, faulted
SF
6
gas is so foul smelling no one
can stand exposure long enough
at a concentration high enough to
cause permanent damage.
at a concentration high enough to
cause permanent damage.
b. Solid arc products.- Solid arc
products are toxic and are a white
or off-white, ashlike powder. Con-
tact with the skin may cause an
irritation or possible painful
fluoride burn. If solid arc products
come in contact with the skin,
wash immediately with a large
amount of water. If water is not
available, vacuum off arc products
with a vacuum cleaner.
products are toxic and are a white
or off-white, ashlike powder. Con-
tact with the skin may cause an
irritation or possible painful
fluoride burn. If solid arc products
come in contact with the skin,
wash immediately with a large
amount of water. If water is not
available, vacuum off arc products
with a vacuum cleaner.
6.3.2 Clothing and safety equipment
requirements.- When handling and re-
moving solid arc products from faulted
requirements.- When handling and re-
moving solid arc products from faulted
SF
6
,
the following clothing and safety
equipment should be worn:
a. Coveralls.- Coveralls must be
worn when removing solid arc
products. Coveralls are not
required after all solid arc
products are cleaned up.
Disposable coveralls are
worn when removing solid arc
products. Coveralls are not
required after all solid arc
products are cleaned up.
Disposable coveralls are
recommended for use when re-
moving solid arc products; how-
ever, regular coveralls can be
worn if disposable ones are not
available, provided they are
washed at the end of each day.
moving solid arc products; how-
ever, regular coveralls can be
worn if disposable ones are not
available, provided they are
washed at the end of each day.
b. Hoods.- Hoods must be worn
when removing solid arc
products from inside a faulted
dead-tank circuit breaker.
when removing solid arc
products from inside a faulted
dead-tank circuit breaker.
c. Gloves.- Gloves must be worn
when solid arc products are hah-
died. Inexpensive, disposable
gloves are recommended. Non-
disposable gloves must be
washed in water and allowed to
drip-dry after use.
when solid arc products are hah-
died. Inexpensive, disposable
gloves are recommended. Non-
disposable gloves must be
washed in water and allowed to
drip-dry after use.
d. Boots.- Slip-on boots, non-
disposable or plastic disposable,
must be worn by employees who
enter eternally faulted dead-tank
circuit breakers. Slip-on boots
are not required after the
removal of solid arc products
and vacuuming. Nondisposable
boots must be washed in water
and dried after use.
disposable or plastic disposable,
must be worn by employees who
enter eternally faulted dead-tank
circuit breakers. Slip-on boots
are not required after the
removal of solid arc products
and vacuuming. Nondisposable
boots must be washed in water
and dried after use.
e. Safety glasses.- Safety
glasses are recommended when
handling solid arc products if a
full face respirator is not worn.
glasses are recommended when
handling solid arc products if a
full face respirator is not worn.
f. Respirator.- A cartridge, dust-
type respirator is required when
entering an internally faulted
dead-tank circuit breaker. The
respirator will remove solid arc
products from air breathed, but it
does not supply oxygen so it
must only be used when there is
sufficient oxygen to support life.
type respirator is required when
entering an internally faulted
dead-tank circuit breaker. The
respirator will remove solid arc
products from air breathed, but it
does not supply oxygen so it
must only be used when there is
sufficient oxygen to support life.
(FIST 3-16 1/92)