ELTEX Terrabox TCB030, Руководство по эксплуатации

Страница: 10 / 44

10
BA-en-4003-2005_TUE30
cally safe measuring circuit (see chapter 3.1.3 "Electrical connections”,
page 13 , chapter 3.2.2 "Electrical connections”, page 19 ).
• The maximum cable length in the intrinsically safe circuit must not
exceed the maximum rated capacity and inductance (see Technical
Specifications), see
chapter 3.1.3 "Electrical connections”, page 13 ,
chapter 3.2.2 "Electrical connections”, page 19 ).
• A potential equalization system (PA) has to be set up along the com-
plete measuring circuit (see chapter 3.1.2 "Assembly”, page 13 ).
• The Terracompact II TCO030 must be mounted outside the hazardous
area. Only the intrinsically safe circuit is allowed to lead into the hazar-
dous area
(see chapter 3.2.1 "Assembly”, page 19 ).
• If a TCO30 or TCB030 is supplied wiht 24 V, make sure that the supply
(24 V) is ungrounded. If required, the negative connection can be con-
nected with PAL (see
chapter 3.3 "Supply voltage”, page 24 ).
• If the ground cable is subjected to tensile stress in the application (e.g.
if KG/BN_ (ground cable) or KG/BS_(helix ground cable) is used), the
cable must be secured additionally with an external strain relief (e.g. a
strap clip), see
chapter 3.4 "Cable specification”, page 24 .
• Please note the type plate indicating the connection data (supply vol-
tage) of the units (see chapter 4 "Operation”, page 25 ).
• During operation with 2 ground contactors, it is not only the ground link
of the BIG-BAG which is being monitored, but also the conductivity of
the BIG-BAG. Note that both ground contactors are connected to two
different grounding points of the BIG-BAG
(see chapter 4.3 "Operation
with 2 ground contactors, BIG-BAGgrounding”, page 26 ).
• Cables and clamps must not be damaged. Damaged cables and
clamps must be replaced with new parts (see chapter 5 "Maintenance”,
page 28 ).
• Check the units at regular intervals for proper function, in doing so
check the operating points and the earthing resistance (see chapter 5.1
"Ground control units”, page 28 ).
• To make sure that the proper ground connection exists with the equipo-
tential bonding and that no malfunctions occur in active clamps, the
ground clamp must be cleaned when dirty (see
chapter 5.2 "Ground
clamps”, page 29 ).
• Store the ground clamp such that it cannot be damaged. Replace
damaged cables and clamps with new parts. Whenever possible, the
ground clamp should either be hung up freely or be clamped to a non-
conductive object (see
chapter 5.2 "Ground clamps”, page 29 ).
• Perform regular checks to ensure that the cable and the insulation
show no tears or abrasion that could impair the cable's insulation or
functioning (see
chapter 5.3 "Cable rewinders”, page 29 ).