Residual
voltage (Ures
)
The peak value the voltage across the terminals the surge protection device during immediately follow-
ing the passage the arrested surge current. Test pulse 10/350
Surge arrestor,
type 2
SPDs that can arrest surge voltages caused remote nearby strikes switching operations. can arise due thunderstorms, earth faults and short circuits.Term Standard text
Nominal
voltage (Un
)
The nominal voltage the voltage value for which resource designed.
Mounting video Videos mounting the surge protection devices at: https://www.
SPD Surge protection device (arrestor).youtube. the rating the fuse before arrestor higher than
the maximum permissible back-up fuse rating for the arrestor elements (see device technical data),
the arrestor must fused selectively with the required value.
Surge protec-
tion device
(SPD)
A device intended for the limitation transient surge voltages and arresting surge voltages. Surge protection devices are also commonly referred "ar-
restors".
Protection level
(Up
)
The protection level the maximum instantaneous voltage the terminals the surge protection device prior
to response.
Back-up fuse
before the ar-
restors
A back-up fuse must fitted before arrestors.
Transient
surge voltage
(TOV)
Temporary surge voltages are short term (i.
Nominal cur-
rent (In
)
The nominal current the maximum permissible operating current which can continuously
passed through connection terminals marked with that value.
Temperature
range
The operating temperature range specifies the upper and lower temperature limits between which the flawless
functioning surge protection device guaranteed. The follow current differs considerably from
the permanent operating current.2/50 8/20
Transmission
frequency (fg
)
The transmission frequency the maximum frequency which the insertion loss resource still below 3
dB. temporary) surge voltages, which may occur due errors within
the medium and low-voltage network.
Surge arrestor,
type 1
SPDs, which, due their special structure, are able arrest lightning currents partial lightning currents dur-
ing direct strikes. The magnitude the line follow current depends the supply line from
the transformer the arrestor.
Line follow cur-
rent quenching
(If
)
The follow current also called network follow current the current which flows through the surge protection
device after arresting operation and supplied the network.
Equipotential
bonding
Electrical connection bringing the bodies electrical equipment and extraneous conductive parts the same
or similar potential.
Equipoten-
tial busbar
(PAS)
A terminal rail, intended connect the protective conductor, the equipotential bonding cable and, neces-
sary, the conductor for function earthing with the earthing cable and the earthers.e.
Surge voltage
A surge voltage voltage occurring briefly between conductors between conductor and the earth
which exceeds the highest permissible operating voltage value long way, but does not have the operating
frequency. This can voltage value
or the effective value sinusoidal voltage.
It contains least one nonlinear component.com/obodeutschland
Differentiation: LPL LPC lightning protection class
LPZ lightning protection zone
LPS lightning protection system
Important: Standardised terminology for technical terms/abbreviations
TBS
Blitzschutz-Leitfaden
2018
/
en
/
2020/01/10
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Chapter Small surge voltage ABC
. Test pulse 1. Test pulse =
8/20
Surge arrestor,
type 3
SPDs used for the surge voltage protection individual consumers groups consumers and used directly
at the socket
