13
iMportant
• To prevent any water infiltration through the
cable conduits, make sure the cable glands
have the minimum protection degree required
by the plant.
• If rigid conduits are used, we suggest placing
a flexible pipe connection between the conduit
and the terminal board.
figure 11 -
overview of the cable entries conduits.
4.12 CabLe entries
the sealing of cables and conduit entries
should be carried out in accordance with
national standards or the regulatory
authorities that have certified the actuators.
this is particularly true for units that are
certified for use in hazardous areas where
the method of sealing must be to an approved
standard, and cable glands, reducers, plugs
and adapters must be approved and separately
certified.
in order to properly connect the cables,
remove the cable entry plugs and make all the
necessary connections.
to guarantee the proper weatherproof fit,
degree IP66/68 must be ensured: screw the
cable glands tightly and block them with a
thread sealant. the use of a thread sealant is
necessary in case of explosionproof application.
if some parts of the cable glands have been
removed while working on the cable entries,
put them back into place in order to avoid
losing the dismantled parts.
unused entries:
• For explosionproof construction: unused
entries must be plugged with metal
explosionproof plugs and blocked with a
thread sealant
• For weatherproof construction: replace the
standard plastic protection plugs supplied
with the actuator with suitable plugs to
guarantee the requested protection degree
iMportant
In order to physically separate the power from
the signal terminal, place the power clamps
protection (provided with the actuator) on the
power terminal, once you have completed the
power cable connection. This will avoid any
accidental contact with the power terminals
during the cabeling operation on the signal
terminals.
Keystone
ePi-2 quarter-turn electric actuator
InstallatIon and MaIntenance InstructIons
4.13 safety instruCtions for
instaLLation in haZardous area
4.13.1 instructions for explosionproof
enclosures
iMportant
EPI-2 electric actuators must be installed and
maintained according to the applicable Rules
regarding the electrical installation in hazardous
areas (other than mines) classified as zone 1 and/
or 2 (gas) and zone 21 and/or 22 (dust) according
to EN 60079-10 (hazardous area classification).
Example: EN 60079-14 (electrical installation),
EN 60079-17 (maintenance).
During the dismantling and subsequent
reassembling of the explosionproof enclosures
(covers, cable glands, joints) be careful
to bring these enclosures back to their
original condition to maintain their integrity.
in particular, be sure the joint surfaces of
all enclosures are spread with a film of
recommended grease.
Proceed as follows:
• Do not damage the explosionproof mating
surfaces on the housing and on the electrical
enclosure covers
• Reinstall all the screws that go with the
dismantled parts, and block them with a
thread sealant after spreading them with
a film of copper- or molybdenum-based
grease. this will keep screws from sticking
and make maintenance operations easier
• Check that the bolts and screws are the same
dimension and quality as the original ones (as
stated on the nameplate), or a better quality
• Replace the weatherproof seals that may
have been removed (o-ring for the covers)
