Operating Instructions – Explosion-Proof AC Motors – DRS/DRE/DRP 315
17
5
General information
Electrical Installation
5
Electrical Installation
5.1
General information
5.1.1
Additional regulations for potentially explosive atmospheres
In addition to the generally applicable installation regulations for low-voltage equipment
(e.g. in Germany: DIN VDE 0100, DIN VDE 0105), it is also necessary to comply with
the special regulations for setting up electrical machinery in potentially explosive atmo-
spheres (operating safety regulations in Germany: EN 60079-14; EN 61241-14 and sys-
tem-specific regulations).
5.1.2
Cable entries
The terminal boxes have metric threaded holes according to EN 50262 or NPT threaded
holes according to ANSI B1.20.1-1983. All metric cable entries are supplied with ATEX
certified closing plugs.
To establish the correct cable entry, the sealing plugs must be replaced by ATEX ap-
proved cable glands with strain relief. Select the cable screw fitting according to the
outer diameter of the cable used. The IP enclosure of the cable entry must be at least
as high as the IP enclosure of the motor.
All cable entries that are not required must be sealed off with an ATEX certified closing
plug after completion of the installation
(→
maintaining the enclosure).
5.1.3
Equipotential bonding
In accordance with EN 60079-14 and EN 61241-14, it might be necessary to establish
a connection to an equipotential bonding system. Observe section "Improving the
grounding (EMC)" (see page 19).
NOTES
• Do observe the safety notes in chapter 2 (see page 7) during installation!
• Use switch contacts in utilization category AC-3 according to EN 60947-4-1 for
switching the motor.
