Belden Hirschmann GREYHOUND GPS1-C Руководство пользователя - Страница 12
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Capacitance and inductance of the fi eld wiring from the non-incendive circuit to the asso-
ciated apparatus shall be calculated and must be included in the system calculations as
shown in Table 1.
Cable capacitance (C
the marked capacitance (C
The same applies for inductance (L
Where the cable capacitance and inductance per foot are not known, the following values
shall be used:
C
= 60 pF/ft (196.85 pF/m)
cable
L
= 0.2 μH/ft (0.66 μH/m)
cable
Table 1:
Non-incendive
Equipment
V
(or U
)
max
i
I
(or I
)
max
i
P
(or P
)
max
i
C
+ C
i
cable
L
+ L
i
cable
Suitability for installation in particular applications is at the discretion of the Authority Having
Jurisdiction (AHJ).
Control Drawing for GRS 1042/1142 devices for use in Hazardous
Locations according to ANSI/ISA12.12.01-2015 Class I, Division 2,
Groups A, B, C, D
Rev.: 0
12
) plus non-incendive equipment capacitance (C
cable
(or C
)) shown on any associated apparatus used.
a
o
, L
cable
Associated
Apparatus
≥
V
or V
(or U
)
oc
t
o
≥
I
or I
(or I
)
sc
t
o
≥
P
o
≤
C
(or C
)
a
o
≤
L
(or L
)
a
o
Document No.: 000205339DNR
and L
or L
, respectively).
i
a
o
Installation GREYHOUND Switch
) must be less than
i
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Release 08 02/2021