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Accessories
8.3 Oil differential pressure sensor INT250 Ex
(retrofit kit item no. 80516)
The oil differential pressure sensor kit INT250 Ex consists of screw-in parts INT250 Ex and switching
parts, switching repeater and two timers. The switching part INT250 Ex is supplied with a 3-meter
electrical supply line.
Electrical wiring within the potentially explosive area could be through the terminal box compressor.
Within the zone classification, the electrical circuit must be executed intrinsically safe, a switching
repeater is included with the kit.
The timers contained in the kit must be integrated in accordance with the basic cir
-
cuit diagram of these instructions for assembly, They enable the rise/fall delay of the
oil differential pressure sensor INT250 Ex. Enable the time relay on a on delay of 90 sec. (KF1) res.
on a drop-off delay of 90 sec. (KF2). The switching repeater and the central control unit must be
installed outside the explosive area in the switch cabinet. The connection line for the connecting part
INT250 Ex must be laid permanently and mechanically protected.
During assembly and installation of the oil differential pressure sensor INT250 Ex, the requirements
of EN 60079-14 and the BetrSichV operational safety regulations must be met. In addition, nationally
valid laws, regulations (in Germany VDE 0100) or provisions must be observed.
Additional installation instructions and installation/deinstallation instructions can be obtained from
the accompanying kit documentation.
Oil differential pressure sensor INT250 Ex
(Art. No. 60018)
Conditions for intrinsic safety
U
o
≤
U
i
9.6 V
≤
9.6 V
I
o
≤
I
i
10 mA
≤
10 mA
P
o
≤
P
i
24 mW
≤
24 mW
L
o
≥
∑
L
i
+ L
c
*
350 mH
≥
0.25 mH
*
C
o
≥
∑
C
i
+ C
c
*
90 nF
≥
52.42 nF*
The following values must be taken as a basis for verifying intrinsic safety
:
*) Values for L
c
/
C
c
represent example values for the total output length of 250 m, and they must be
updated by the system builder in accordance with your design
.
L
i
: O mH C
i
: 2.42 nF
ATTENTION Installation must be in accordance with EN 60079-14 as an in-
trinsically safe electrical circuit and protected by the switching
repeater already contained in the kit.
Risk of static charge from the plastic housing of the INT250 Ex.
Avoid strong charge-generating processes in the proximity of the com
-
pressor (see Chapter 1.3). Carry out the cleaning work using only a
damp cloth and away from potentially-explosive atmospheres.
