2.4. Lightning protection
PSW-2G2F+UPS switch has built-in lightning protection modules that
protect Ethernet ports and 220V power circuits from common-mode and
differential electromagnetic interferences.
The switch is resistant to powerful microsecond pulse interferences
according to GOST R 51317.4.5 standard with the degree of severity
according to Table 2.4-1, performance criteria B.
The switch is resistant to AC transients in the power supply circuit
according to GOST R 51317.4.11 standard, Table 2.4-2, performance
criteria B.
Table 2.4-1.
port
Degree of severity according to
Table 1 GOST R 51317.4.5
Voltage pulse
value, kV + 10%
Power supply lines
3
2
“wire-to-wire”
Power supply lines
4
4
“wire-to-ground”
Symmetrical communication lines
3
2
“wire-to-ground”
Table 2.4-2.
T
yp
e
o
f
imp
a
ct
D
e
g
re
e
o
f
te
s
t
se
ve
ri
ty
T
e
st
vo
lta
g
e
,
%
U
n
,
+
5
%
A
m
p
litu
d
e
o
f
d
yn
a
m
ic
vo
lta
g
e
ch
a
n
g
e
s
%
U
n
P
e
ri
o
d
o
f
vo
lta
g
e
ch
a
n
g
e
s
(m
s)
Voltage dips
1
70
30
10 (200)
Voltage
interruptions
1
0 to 20
100
1 (20)
Voltage surges
2
120
20
25 (500)
Note: Un is the nominal power supply voltage.
10
