The document provides an overview of surge protection devices, detailing various types of surge arresters (Types 1, 2, and 3) and their specific functions in protecting electrical systems from voltage spikes caused by external and internal events. It highlights the roles of surge suppressors and other related devices like fuse switches and fuse holders in safeguarding sensitive equipment. Additionally, it includes contact information for Visum Ltd., the company presenting this information.

1. THE BEST VIRTUAL EXPO FOR INDUSTRIAL AUTOMATION
PRODUCTS
Introduction to :
Surge protection devices

2. Surge protection devices
A surge protector (or surge suppressor) is an appliance
designed to protect electrical devices from voltage
spikes. A surge protector attempts to limit
the voltage supplied to an electric device by either
blocking or by shorting to ground any unwanted
voltages above a safe threshold.
Surge arresters type 1 Surge arresters type 2
Surge arresters type 3 Surge arresters
Surge suppressors Single-pole surge arresters
Low voltage surge arresters Medium surge arresters

3. S u r g e a r r e s t e r s t y p e 1
Surge arresters type 1 can also be referred to as
secondary surge arresters. Secondary surge
arresters are mainly located in the main panel
board in order to divert to the ground the high
amount of energy coming from lightning strike.
Surge arresters type 1 have the main function
of preventing sensitive electronics from
damaging effects of electrical surges. Surge
arresters type 1 are designed to discharge high
energies from lightning related impulses while
ensuring equipotential bonding in cases of direct
lightning strike on installations fitted with these
equipment.

4. S u r g e a r r e s t e r s t y p e 2
Surge arresters type2 are usually installed
downstream of type 1 surge arresters in
main distribution boards or sub- distribution
boards found in electrical circuits or buildings
and machinery with the devices installed on
them.
Type 2 surge arresters protect low- voltage
systems from transient over-voltages that may
arise. Spark gaps found in surge arresters
type 2 are normally tripped in nature hence
elimination of the need to use decoupling
reactors during installation of these over-
voltage protection devices.

5. S u r g e a r r e s t e r s t y p e 3
Surge arresters type 3 electrical devices are
mainly used for protecting terminal equipment
from over- voltage transients caused by both
external and internal events. Different types
of enclosures easily available for
installation procedures allow easy installations
close to terminal equipment.
Surge arresters type 3 normally block lower
level surges that are highly damaging to
sensitive household electronics. Surge arresters
type 3 devices are used to provide point of use
protection hence are considered the last line of
defense for electronic equipment and appliances
in a whole house range protection electrical
network.

6. S u r g e a r r e s t e r s
Wikipedia the free encyclopedia defines surge
arresters as devices used to protect electrical
equipment from over- voltage transients caused
by external events like lightning or internal events
like switching processes.
Surge arresters can also be referred to as surge
protection devices going by the acronym SPD or
transient voltage surge suppressor with the
acronym TVSS.

7. Surge suppressors
Surge suppressors are also referred to as surge
protectors by various manufactures due to their
use in protecting equipment and machinery.
Webopedia defines surge protectors as types
of electronic devices that shield computers and
electronic devices from surges in electrical
power or transient voltage that flow from the
power supply.
Surge suppressors mainly work by
channeling surplus voltage into the
designated outlets grounding wire preventing
them from flowing into the electronic appliances
fitted or directly connected to them.

8. Single-pole surge arresters
Single- pole surge arresters. These are devices
used to protect electrical equipment and
machinery from random and dangerous power
surges in a single- pole state.
Single- pole surge arresters are capable of
protecting terminal equipment and have a higher
lighting current discharge hence making them
more effective in terms of protection.

9. Low voltage surge arresters
Low voltage surge arresters are electrical
devices used to protect equipment and
machinery from over- voltage transients in low-
voltage distribution systems. Low voltage surge
arresters can be used as electrical appliance
protectors or as low voltage distribution
transformer windings.
These types of surge arresters can be used for
both indoor and outdoor applications. LOVOS is
a common acronym used to describe low
voltage surge arresters in the engineering field.

10. Medium-voltage surge arresters
Medium votage surge arresters are indoor and
outdoor electrical installation geared towards
protecting electric transformers, switch-gears
and transmission lines in electrical based MV
systems that are most likely to experience power
surges.
Medium voltage surge arresters can be
designed for both alternating current or direct
current related equipment and installations. The
over-voltages that medium voltage surge
arresters protect equipment from may be
atmospheric in nature or those brought about
by switching processes in electrical circuits.

11. Fuse switches
They are low voltage switching devices that
enable safe manual connecting and
disconnecting of electrical circuits under load.
Fuse- switches can also be referred to as fuse
combination switches depending on the type of
manufacturer.
These types of electrical safety devices can be
either automatic in nature or allow mechanical
handling by human beings.

12. Fuse holder
As the name fuse holder suggests, these are
devices or equipment used to keep electrical
fuses in their required positions preventing them
from interacting with other electrical devices
found in machinery or equipment.
Most of the fuse holders have insulation
properties hence do not influence electrical
circuits or affect them in any way possible.

13. S u r g e p r o t e c t i o n d e vi c e s
Contact details :
VISUM Ltd.
Letna 40
040 01 Kosice
Slovakia - E.U.
Share this presentation and follow us on social networks