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SURGE ARRESTORS
SURGE ARRESTORS
INTERNAL
PROTECTION –
TRANSIENT SURGES
66
SURGE PROTECTORS 70
POWER LINE
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SURGE ARRESTORS | INTERNAL PROTECTION - TRANSIENT SURGES |
INTERNAL PROTECTION TRANSIENT SURGES

overview
The voltage surges are elevations in voltage that can occur in electrical distribution, data communications and
telephony lines resulting in a premature aging of components and / or damage to the equipment connected to
the network.
Overvoltages caused by direct lightning (Fig. 19), indirect (Fig. 20), disconnection of inductive loads (coils,
motors, etc ...), network switches and / or defects in them (Fig occur. 21).
Overvoltage surges are large spikes have with a slope and are short-lived, yet the strong effects on sensitive
electronic equipment are devastating.
The level of the voltage that can appear on the network is a function of isoceraúnico area level (lightning / year
• Km2), the type of attack, aerial or underground, and the proximity of the MV / LV transformer.
For proper protection of the equipment against power surges, a system must perform grounding of low ohmic
value and connect equipotentialy with an external protection system. Moreover, you should install protection
against surges on supply lines (power, telephone, data, etc.).
Installation of external lightning protection (according to IEC 62305-3) and surge arresters (according to IEC
62305-4) significantly reduces the risk of damage caused by lightning in structures, equipment and people
(calculation risks according to IEC 62305-2).
protection
zones (LPZ)
•External areas:
• Sources of damage:
LPZ 0A: area exposed to direct lightning strike (current and
total magnetic field)).
LPZ 0B: area exposed to indirect impact (partial flow and total
magnetic field).
S1: Direct discharge on the structure
S2: Indirect discharge near the structure
S3: The discharge on service lines connected to the structure
S4: Indirect discharge near service lines connected to the
structure.
Fig. 19 – Direct discharge.
•Internal areas:
LPZ 1: area exposed to overvoltage (induced current CIDA
and attenuated magnetic field).
LPZ 2…n: area exposed to overvoltage (current
induced).
SPD: Surge Protectors.
r: rolling sphere radius
1: Structure
2: Lightning rods
3: Down-conductors
4: Grounding systems
5: Incoming services
6: Services connected to the structure
Fig. 20 – Nearby indirect discharge.
Fig. 21 – Switching networks.
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SURGE ARRESTORS | INTERNAL PROTECTION - TRANSIENT SURGES |
INTERNAL PROTECTION TRANSIENT SURGES

surge categories

selection of surge protectors
The categories indicate what the value of voltage shock wave to withstand for the equipment and determine the
maximum value of residual voltage Up which should have surge protectors in each area.
Surge protectors are connected between an active conductor (phase) and ground, upstream of the equipment
they protect.
The purpose of installing surge protectors is to avoid the devastating effects of surges on electrical and / or
electronic equipment, cutting these peaks to permissible values as per RBT ITC-23, depending on the category
that has the equipment want to be protected (Fig. 22).
Normal impedance is high, but when the voltage exceeds the threshold voltage, the protector becomes
a low-impedance ground to dissipate the surge, protecting the equipment.
To select which protector to install, we must consider:
· Nominal line voltage.
· Number of phases to be protected.
· Type of network (TT, TN, TNC, SCNT).
· Category of equipment to be protected.
· Level of exposure to surges (Imax).
standards

Surge protection devices must conform to the following standards:
· UNE EN 61643-11:2013 Low voltage surge protection devices.
· IEC 62305 series – Lightning protection:
SWITCHGEAR
MACHINE
TOOL
ELECTRONIC
EQUIPMENT
- IEC 62305-1: Protection against lightning - General principles.
- IEC 62305-2: Protection against lightning –Risk management.
- IEC 62305-3: Protection against lightning – Physical damage to structure and life hazard.
- IEC 62305-4: Protection against lightning – Electrical and electronic systems within structures.
· UNE 21186:2011 /NF C 17-102:2011 Protection against lightning: Lightning rods with early stream emitters.
· UNE EN 60664-1 Isolation coordination for low voltage equipment systems (networks).
Category III: 4 kV
Category II: 2,5 kV
Category I: 1,5 kV
Fig. 22 – Surge categories
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SURGE ARRESTORS | POWER LINE SURGE PROTECTORS |
SLS-B+C100/1+1
POWER LINE
SURGE PROTECTORS
Combined lightning discharger for low voltage networks of type 1 and 2, class B + C.
220V monophase lines.
SLS-B+C100/1+1

IP20
from -40º to 80ºC-
-
- - 45 48 300
Parameters
EN-60664-1
L
L-NNPE
UNE 21.186:2011
Rated voltage
Un
230 V AC
Maximum working voltage
260 V AC 255 V AC
NFC 17-102:2011
Uc
Peak value of lightning current (10/350µs)
Iimp
25 kA
50 kA
Nominal discharge current (8/20µs)
In
30 kA
50 kA
Maximum discharge current (8/20µs)
Imax
60 kA
100 kA
Protection level
Up
Maximum fuse protection
For protection of other lines (voice, data) or other such facilities
(electrical installations with different voltage, photovoltaic installations,
etc ..) please consult.
PE( )
SLS-B+C100
SPD T1 T2
D
-
<1,50 kV
-
Min-max section rigid conductor connection
2,5-50 mm2
100 ns
Uc:
Iimp:
I n:
Imax:
Up:<
A
( )
PE( )
SLS-B+C100 N
SPD T1 T2
rojo – fallo
red – defect
U c:
Iimp:
I n:
Imax:
Up:<
tA
SPD
260 V~
25 kA
30 kA
60 kA
1,5 kV
E
SLS-B+C100
SPD T1 T2
Response time
U c:
Iimp:
I n:
Imax:
Up:<
C
L
250A gL/Gg
SLS-B+
rojo – fallo
red – defect
N
N
260 V~
25 kA
30 kA
60 kA
1,5 kV
Uc:
Iimp:
I n:
Imax:
Up:<
N
Easy maintenance through local fault locator.
SLS-B+C100/220V 370215
B
255 V~
50 kA
50 kA
100 kA
1,5 kV
N
Base and modules configured for secure mounting.
from -40º to 80ºC
72 907245 48670
L
Easily replaceable, pluggable and blocking system modules
IP20
PE
Three-phase and single-phase protectors, type 1+2 and type 2.
IEC 61643-11
SLS-B+C100/1+1 370213 F+N
N
Effective protection of main lines, branch lines, switchboards and
equipment.
IEC 62305-1, 2, 3 y 4
Working A BCDE
Nº Protection Weight
temp. (mm) (mm)(mm)(mm)(mm) (g)
Ref. Phases grade
range
L
General protection against lightning and surges of low-voltage on
electrotechnical facilities
Description
N
Min-max section multi-strand conductor connection 2,5-35 mm2
Line lenght
Main distribution
Local fault indicator
yes no
Installation A
DIN rail
SLS-B+C100/3+1
Line lenght
Distribution board
Fine net protection
Combined lightning to low voltage discharger for networks of type 1 and 2, class B + C.
380V three-phase lines.
SLS-B+C100/3+1

Description
Type 1 + 2
Type 2
Working A BCDE
Nº Protection Weight
temp. (mm) (mm)(mm)(mm)(mm) (g)
Ref. Phases grade
range
SLS-B+C100/3+1 370214 3F+N
IP20
SLS-B+C100/220V 370215-
IP20 from -40º to 80ºC- - - 45 48 300
from -40º to 80ºC
144907245 481300
Type 3
Parameters
Main grounding connection
Local grounding connection
L-NNPE
Rated voltage
Un
230 V AC
Maximum working voltage
Uc
260 V AC 255 V AC
Peak value of lightning current (10/350µs)
Iimp
25 kA
100 kA
Nominal discharge current (8/20µs)
In
30 kA
100 kA
Maximum discharge current (8/20µs)
Imax
60 kA
100 kA
Protection level
Up
Maximum fuse protection
Response time
tA
Min-max section rigid conductor connection
2,5-50 mm2
-
D
E
C
<1,50 kV
250A gL/Gg
-
100 ns
B
Min-max section multi-strand conductor connection 2,5-35 mm2
Local fault indicator
yes no
Installation
DIN rail
A
ingesco.com
N
SURGE ARRESTORS | POWER LINE SURGE PROTECTORS |
SLS-B+C30/1+1
SLS-C20/1+1
Combined low-voltage surge protector for type 1 and 2, class B + C. 220V single phase lines.
SLS-C20/1+1

Description
Working A BCDE
Nº Protection Weight
temp. (mm) (mm)(mm)(mm)(mm) (g)
Ref. Phases grade
range
Description
Working A BCDE
Nº Protection Weight
temp. (mm) (mm)(mm)(mm)(mm) (g)
Ref. Phases grade
range
SLS-B+C30/1+1
36 827245 48240
370216F+N IP20 from -40º to 80ºC
SLS-C20/1+1
370219F+N
36 827245 48230
IP20 from -40º to 80ºC
SLS-B+C30/220V 370218- IP20from -40º to 80ºC- - - 45 48 95
SLS-C20/220V
370221-
IP20from -40º to 80ºC- - - 45 48 95
Parameters
Parameters
Un
230 V AC
Maximum working voltage
Uc
275 V AC 255 V AC
25 kA
Peak value of lightning current (10/350µs)
Iimp
30 kA
30 kA
Nominal discharge current (8/20µs)
In
20 kA
20 kA
60 kA
60 kA
Maximum discharge current (8/20µs)
Imax
40 kA
40 kA
Protection level
Up
Maximum fuse protection
Response time
tA
25 ns
Min-max section rigid conductor connection
1-35 mm2
Min-max section multi-strand conductor connection 1-25 mm2
Imax
Protection level
Up
Maximum fuse protection
Response time
tA
Min-max section rigid conductor connection
160A gL/Gg
Min-max section multi-strand conductor connection E
A
<1,5 kV
Local fault indicator
Installation
-
25 ns
1-35
mm2
1-25 mm2 yes no
DIN rail
Local fault indicator
Installation
Description
Working A BCDE
Nº Protection Weight
temp. (mm) (mm)(mm)(mm)(mm) (g)
Ref. Phases grade
range
SLS-B+C30/3+1
3702173F+N
SLS-B+C30/220V 370218-
IP20
from -40º to 80ºC
72 827245 48460
IP20 from -40º to 80ºC- - - 45 48 95
Parameters
B
A
B
D
PE
yes no
E
DIN rail
A
C
Low-voltage surge protector for type 2, class C. 380V three-phase lines.
Rated voltage
Description
Working A BCDE
Nº Protection Weight
temp. (mm) (mm)(mm)(mm)(mm) (g)
Ref. Phases grade
range
SLS-C20/3+1
3702203F+N
IP20
SLS-C20/220V
370221-
IP20 from -40º to 80ºC- - - 45 48 95
from -40º to 80ºC
72 827245 48450
Parameters
E
N
SLS-C20/3+1

SLS-B+C30/3+1

C
L
SLS-C20/3+1
Combined low-voltage surge protector for type 1 and 2, class B + C. 380V three-phase lines.
D
A
E
C
-
C
SLS-B+C30/3+1
PE
<1’5 kV
160 A gL/gG
Un
L-NNPE
230 V AC
-
L-NNPE
Rated voltage
Un
230 V AC
Maximum working voltage
Uc
275 V AC 255 V AC
-
Maximum working voltage
Uc
Peak value of lightning current (10/350µs)
Iimp
7 kA
25 kA
Peak value of lightning current (10/350µs)
Iimp
Nominal discharge current (8/20µs)
In
30 kA
30 kA
Nominal discharge current (8/20µs)
In
20 kA
20 kA
Maximum discharge current (8/20µs)
Imax
60 kA
60 kA
Maximum discharge current (8/20µs)
Imax
40 kA
40 kA
Protection level
Up
<1,2 kV
<1,5 kV
Protection level
Up
<1,35 kV
Maximum fuse protection
Maximum fuse protection
Response time
tA
Response time
Min-max section rigid conductor connection
tA
1-35 mm2
Min-max section rigid conductor connection
1-35 mm2
Min-max section multi-strand conductor connection 1-25 mm2
Min-max section multi-strand conductor connection 1-25 mm2
260 V AC 255 V AC
160A gL/Gg
25 ns
100 ns
Local fault indicator
Installation
DIN rail
yes no
-
25 ns
Local fault indicator
Installation D
12 kA
E
C
<1,50 kV
160A gL/Gg
SPD T2
Maximum discharge current (8/20µs)
12 kA
SLS-C20 N
In
rojo
fallo
red
defect
Nominal discharge current (8/20µs)
-
SPD T2
7 kA
N
D
SLS-C20
Iimp
-
SPD T2
Peak value of lightning current (10/350µs)
-
SLS-C20 N
260 V AC 255 V AC
rojo
fallo
red
defect
Uc
SPD T2
230 V AC
Maximum working voltage
SLS-C20
Un
B
PE
B
D
L
L
C
L-NNPE
Rated voltage
N
A
L-NNPE
Rated voltage
-
B
100 ns
yes no
DIN rail
ingesco.com
A
PE
E
Low-voltage surge protector for type 2, class C. 220V single phase lines.
L
SLS-B+C30/1+1

D
73
SURGE ARRESTORS | POWER LINE SURGE PROTECTORS |
N
72
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PROTECTION SINCE 1973
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