3
INSINTRIC
SAFETY
PARAMETERS
Supply
line
marginal
parameters:
Maximum
input
voltage
U
I
25
V
Maximum
input
current
I
I
99
mA
Maximum
input
power
P
I
0,613
W
Maximum
inner
capacity
C
I
16,5
nF
Maximum
inner
inductance
L
I
0*
Maximum
outer
capacity
C
o
110
nF
**
Maximum
outer
inductance
L
O
2,5
mH**
Detector
‐
alarm
indicator
connecting
line
parameters:
Maximum
output
voltage
U
O
25
V***
Maximum
output
current
I
O
99
mA***
Maximum
output
power
P
O
0,613
W***
*
negligible
parameters
**
represents
the
sum
of
capacity
and
inductance
resulting
from
the
length
of
cables
that
may
be
connected
to
the
detector
***
values
that
may
occur
in
case
of
uncountable
damages
Intrinsically
safe
barrier
or
separator
parameters:
Maximum
output
voltage
U
O
25
V
Maximum
output
current
I
O
99
mA
Maximum
output
power
P
O
0,613
W
Minimum
output
resistance
R
I
300
Ω
Maximum
outer
capacity
C
O
110
nF
Maximum
inner
inductance
L
O
2,5
mH
Connecting
cable
example
(
YnTKSY):
Core
diameter
mm
0,8
1,0
Single
core
resistance
Ω
/km
37,5
24
Pair
of
cores
capacity
nF/Km
120
120
Inductance
mH/km
0,7
0,7
Note:
The
total
line
capacity
and
line
inductance
as
well
as
total
inner
inductance
of
the
detectors
installed
behind
an
intrinsically
safe
barrier
of
separator
must
not
exceed
the
level
of
110
nF
and
2,5
mH.
As
a
result
in
practice
it
is
not
possible
to
connect
more
than
five
TUN
‐
38Ex
detectors
behind
an
intrinsically
safe
barrier
of
separator.
4
SAFETY
CONDITIONS
4.1
Repairs
and
maintenance
Any
maintenance
works
or
periodic
inspection
shall
be
executed
by
skilled
personnel
employed
by
companies
authorised
and
trained
by
POLON
‐
ALFA.
Any
repairs
must
be
carried
out
by
the
manufacturer.
POLON
‐
ALFA
bears
no
responsibility
for
the
operation
of
any
apparatus
being
repaired
by
unauthorised
personnel.
4.2
Works
at
height
Any
detector
installation
works
carried
out
at
height
must
be
executed
with
particular
care
utilising
tools
and
machinery
in
good
working
condition.
