R·A·V-L-A
SERIES
Power surges, both voltage and current, are occurring
continually in today's power systems. Whether they
occur naturally, such as from lightning and static
electricity; or are man made, such as inductive surges
from motor, transformers, solenoids, etc. power
surges are a fact of life. These power surges have a
very high voltage and current level as compared to
electrical noise.
Recent developments in electronic designs have
tended toward smaller and higher density packaging
of circuitry. This results in a greater susceptibility to
surges. Once attacked by a surge, electronic circuits
of electronic equipment must be aware of, and be able
to deal with, power surges in product design.
OKAYA's R·A·V surge absorbers are designed to
assist in dealing with the problem of power surges.
The R·A·V series is a unique new approach which
combines the features of two well known
technologies. Combining the high speed capabilities
of Metal Oxide Varistor (MOV) with the large power
handling capability of Gas Arrester, OKAYA has
developed a product which can clamp power surges
faster than gas arrester alone and handle large power
surges far beyond the capability of MOV.
SURGE PROTECTIVE DEVICES
Structure
Symbol
Lead terminal
Cap
Electrode of Arrester
Varistor
Ceramic Tube
Inert Gas
Circuit
FEATURES
The R·A·V Surge Absorber is applicable for the
protection of many types of electrical equipment. The
R·A·V has the following features:
1) Large capacity surge protection
2) Fast response time
3) Good endurance to repetitive lightning
4) High clipping performance
5) Low internal capacitance
6) No environmentally hazardous materials
OPERATING PRINCIPAL
The R·A·V connected between lines will shunt the
surge from one side of the line to the other. The high
speed varistor quickly shunts the surge until the
slower, but more powerful gas arrester takes over.
This allows the gas arrester to handle the high energy
portion of the surge and protect the MOV from
damage. This interaction of the R·A·V assures safe
handling of the power surge and long life stability to
the MOV.
(V)
Surge Wave
Absorbed Surge Wave
Voltage
Surge Absorbed Area
Varistor
Operating
Arrester Operating
Time
148
OKAYA [ Okaya Electric America, Inc. ]
