Glossary

A B C D E F G H I J K L M N O P Q R S T U V W X Y Z #

RBS

Radio Base Station

RCD

Residual Current Protective Device

RE

Release Element

Remote signalling contact

A remote signalling contact allows easy remote monitoring and indication of the operating state of the device. It features a three-pole terminal in the form of a floating changeover contact. This contact can be used as break and / or make contact and can thus be easily integrated in the building control system, controller of the switchgear cabinet, etc.

Response time tA

Response times mainly characterise the response performance of individual protection elements used in arresters. Depending on the rate of rise du/dt of the impulse voltage or di/dt of the impulse current, the response times may vary within certain limits.

RET

Remote Electrical Tilt

Return loss

In high-frequency applications, the return loss refers to how many parts of the “leading“ wave are reflected at the protective device (surge point). This is a direct measure of how well a protective device is attuned to the characteristic impedance of the system.

RRH

Remote Radio Head

RRU

Remote Radio Unit