
Operating Instructions – Explosion-Proof AC Motors DR63/eDR63, DVE250/280
23
5
Additional regulations
Electrical Installation
5
Electrical Installation
• Comply with the safety notes in chapter 2 during installation.
• Use switch contacts in utilization category AC-3 according to EN 60947-4-1 for
switching the motor.
• When motors are powered by inverters, adhere to the wiring instructions issued by
the inverter manufacturer.
• Observe the operating instructions of the inverter.
5.1
Additional regulations
The generally applicable installation regulations for low-voltage electric equipment (such
as DIN IEC 60364, DIN EN 50110) must be complied with when setting up electrical ma-
chinery.
5.2
Wiring diagrams and terminal assignment diagrams
Connect the motor only as shown in the wiring diagram(s) included with the motor. Do
not connect or start up the motor if the wiring diagram is missing. You can obtain the
valid wiring diagrams free of charge from SEW-EURODRIVE.
5.3
Checking cross sections
Check the cable cross sections based on the nominal motor current, the valid installation
regulations and the requirements where the unit is installed.
5.4
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 bores are equipped with explosion-proof
closing plugs upon delivery.
For a correct cable entry, replace the closing plugs with cable glands with strain relief
that are certified for use in the respective hazardous location. Select the cable screw fit-
ting according to the outer diameter of the cable used. For the tightening torque of the
cable entry, refer to the operating/installation instructions or the EC prototype test cer-
tificate of the cable glands. The IP degree of protection of the cable entry must be at
least as high as the IP degree of protection of the motor.
WARNING
Danger of electric shock.
Severe or fatal injuries!
• Note the following: