Brochure/Catalogue

for EMR for SSR
Error, relay failure According to IEC 61810, a relay failure is dened as the occurrence of
malfunctions that exceed a certain number:
•  Malfunction when closing contacts
•  Malfunction when opening contacts (contact bridging in CO contact as a
special form of malfunction when opening contacts)
•  Insufcient dielectric strength.
Such malfunctions must be considered in the scope of the application – they
should not create any risks. Depending on the specic load and the power in the
contact set, malfunctions can result in various risks such as malfunctioning of
the device and its controls, electric shock and excessive heating or even re. The
user is responsible for taking the necessary precautions in accordance with the
relevant regulations.
x
F
Flammability according to UL Indicates the ammability class according to the specication from UL 94
(Underwriters Laboratories, Inc., USA). Flammability tests according to UL 94: for
testing plastic materials and classifying the propagation/extinction characteristics
when the material burns. The UL 94 ammability classes which are relevant to
relays are V-0, V-1, V-2 and HB.
x x
G
Galvanic isolation Potential-free isolation between electrical components. Electrical (or galvanic)
isolation means that no charge can ow from one circuit to another. There
is no conductive electrical connection between the circuits. The circuits can
nevertheless exchange electrical power or signals via magnetic elds, infrared
radiation or by charge displacements.
x x
H
Humidity, relative humidity,
condensation
Ratio between the actual and the maximum possible mass (quantity) of water
vapour in the air - Unit: %
When storing or operating under other conditions, steps must be taken to avoid
temperature changes/shocks which could cause icing or condensation.
The plastic used in the products can expand due to high humidity and contract
due to low humidity, which can lead to increased insertion and pulling forces of
cross-connections and other accessories.
x x
I
Impulse withstand voltage Amplitude of a voltage pulse of short duration with a specic pulse shape
(e.g. 1.2/50 μs) and polarity, which is used to test insulation paths in a product.
x x
EMR = Electromechanical relay
SSR = Solid-state relay
Glossary: Relay modules and Solid-state relays
W
Technical appendix/Glossary
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