About This Manual; Target Group; Abbreviations And Symbols - Eaton ZB12/XTOB Handbuch

10/10 MN03407004Z-DE/EN

Target group

Abbreviations and
symbols
h
i

About this manual

This manual applies to the motor-protective relays ZB12/
XTOB...BC1 and ZB32/XTOB...CC1.
It describes the overload monitoring system for the
protection of motors operating in potentially explosive
atmospheres Ex e areas.
This manual addresses special personnel who install,
commission and service the motor-protective relay.
The abbreviations and symbols used in this manual have the
following meaning:
Ex e "Increased safety" type of protection
PTB Physikalisch Technische Bundesanstalt. German
Federal Testing Laboratory: Accredited certification
authority for devices operated in Ex e areas.
NM Lowest possible setup current
HM Highest possible setup current
X indicates actions to be taken.
h Draws our attention towards interesting tips and
additional information
Caution!
Warns of a hazardous situation that could result in
damage to the product or components.
Warning!
Warns of the possibility of a hazardous situation that
could result in major damage and minor injury.
29