Connecting Ex Motors - Eaton PowerXL DB1 Installation Manual

Variable frequency drives

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2.8.6 Connecting EX motors

The following aspects must be taken into account when connecting explo-

sion-protected motors:

•

A DB1 variable frequency drive can be installed in an Ex-area or in a

control cabinet outside of the Ex area.

•

All applicable industry-specific and country-specific regulations for

explosion protection areas (ATEX 100a) must be complied with.

•

The specifications and instructions provided by the motor's manufac-

turer with regard to operation with a variable frequency drive – e.g.,

whether motor reactors (dV/dt limiting) are required – must be taken into

account.

•

Temperature monitors in the motor windings (thermistor, Thermo-Click)

must not be connected directly to the variable frequency drive, but

instead must be connected through a relay approved for the Ex area

(e.g. EMT6).

DB1 Variable Frequency Drives 09/17 MN040031EN www.eaton.com

2 Engineering

2.8 Three-phase motors

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