VEGA B62-30W - Manual (Page 7)

3 .2 Principle of operation
Voltage surges can be caused by indirect atmospheric discharges
(lightning strokes) or switching operations in the supply network.
Further causes can be inductive or capacitive couplings from other
electrical systems. Voltage peaks (transients) must be expected
especially when long power supply and signal cables are used.
Such voltage surges can cause damage to sensors and signal
conditioning instruments.
VEGA overvoltage arresters reduce voltage surges on the supply or
signal cables to a safe level. They are designed for mounting on carrier
rail according to EN 50 022/EN 50 035 in the switching cabinet or in a
metal or plastic housing close to the sensor.
Depending on the version, different combinations of protective
elements for voltage limitation are used. Typical protective elements
are suppressor diodes (diodes with special characterstics), varistors
(voltage-dependent resistors) as well as overvoltage arresters (gas
arresters).
As soon as the voltage increases to the response voltage of the
protective element, the element becomes conductive and the energy
is discharged to ground. After the overvoltage has subsided, the
protective element returns to its high-impedance state and thus has no
influence on the supply or signal circuit.
3 .3 Packaging, transport and storage
The device was protected by packaging during transport. Its capacity
to handle normal loads during transport is assured by a test according
to DIN EN 24180.
The packaging of standard instruments consists of environment-
friendly, recyclable cardboard. For special versions, PE foam or PE foil
is also used. Dispose of the packaging material via specialised
recycling companies.
Transport must be carried out under consideration of the notes on the
transport packaging. Nonobservance of these instructions can cause
damage to the device.
The delivery must be checked for completeness and possible transit
damage immediately at receipt. Ascertained transit damage or
concealed defects must be appropriately dealt with.
Up to the time of installation, the packages must be left closed and
stored according to the orientation and storage markings on the
outside.
Unless otherwise indicated, the packages must be stored only under
the following conditions:
Application area
Functional principle
Packaging
Transport
Transport inspection
Storage
Overvoltage arrester • B62-30W 7
3 Product description
40492
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EN
-110527