About This Manual; List Of Revisions; Target Group; Abbreviations And Symbols - Eaton ZEV Handbuch

05/11 MN03407008Z-DE/EN

List of revisions

Edition Page
10/06 49
05/11 49

Target group

Abbreviations and
symbols

About this manual

This manual applies to the motor-protective system ZEV.
It describes the overload monitoring system for the
protection of motors operating in potentially explosive
atmospheres (EEx e areas).
Description
„Typenschilder/ Rating
plates"
„Typenschilder/ Rating
plates"
This manual addresses skilled personnel who install,
commission and service the motor-protective systems.
The abbreviations and symbols used in this manual have the
following meaning:
CLASS Tripping class of a thermal overload circuit-breaker
Ex e "Increased safety" degree of protection
RTT Rated threshold temperature
PTB Physikalisch Technische Bundesanstalt. German
Federal Testing Laboratory: Accredited certification
authority for devices operated in Ex e areas.
PTC A PTC resistor is a temperature sensor with positive
temperature coefficient
New Modification
j
j
Omitted
35