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Type III surge protection for end devices
Type III surge protection for end devices
Low-voltage consumer installations,
small distribution units and electronics
Surge protection module type III
Our surge protection modules VPU III and VPO DS protect
low voltage consumer installations and electronic devices
from voltage surges that occur through atmospheric
discharge (lightning) or switching activities (transients).
The VPU III and the VPO DS can be built into small
distribution boards or into multi-oor distribution boards.
The VPU III satises the requirements of IEC 61643-11.
Electrical connection
The VPU III or VPO DS surge protection device is installed
after the VPU II arrester and before the device / consumer to
be protected. It can protect electrical circuits of up to 16 A.
An installation can be done in a consumer unit for an
electrical circuit that protects monitors, for example..
Functional check and maintenance
Varistors can exhibit high temperatures as a result of ageing.
In low-voltage systems, this can result in re. The integrated
temperature monitoring device automatically disconnects
the varistor from the power supply. This discon nection is
indicated by the warning lamp being extinguished.
With the VPU III type, a switch contact is also tted for
signalling. With the VPO DS, an LED is used to indicate
status and with the VPO ADS a buzzer highlights any error
messages.
The back-up fuse you install depends on the conductor
cross-section and type of routing. For VPU III arresters, the
maximum power rating is 16 A. The connection is rated to
IEC 947-7-1 for the following cross-sections:
solid conductor: 0.5...2.5 mm
2
exible conductor: 0.5...2.5 mm
2
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C.60 2028840000
Lightning and surge protection for low voltage supply