
30
Operating Instructions – Explosion-Proof AC Motors DR63/eDR63, DVE250/280
5
Connecting category 3G and 3GD motors
Electrical Installation
Motor connection
terminal box
The motors are supplied and connected in different ways depending on the electrical de-
sign. Arrange the terminal links as shown in the wiring diagram and screw them on
firmly. Observe the tightening torques specified in the following tables.
The variants in bold print apply to duty type S1 for the standard voltages and standard
frequencies according to the data in the catalog. Other variants may have different con-
nections, for example, different terminal stud diameters and/or a different scope of de-
livery. The variants are explained in more detail on the following pages.
Arrangement of terminal links for
connection
Motor size DVE250/280:
[1] Terminal link
[2] Terminal stud
[3] Flange nut
[4] Terminal board
[5] Customer connection
[6] Customer connection with split connection cable
U1
U2
V2
V1
W1
W2
[1]
[2]
[3]
[4]
[5]
INFORMATION
The terminal box must be free from foreign objects, dirt and humidity. Unused cable
entry openings and the terminal box itself must be closed at least according to the IP
degree of protection of the motor.
Motor size DVE250/280
Terminal
stud
Tightening
torque of hex nut
Customer
connection
Design
Connection
type
Scope of delivery
PE
Terminal
stud
Variant
Ø
Cross sec-
tion
Ø
M10
10 Nm
≤
95 mm
2
3
Ring cable lug
Small connec-
tion accessories
enclosed in bag
M10
5
M12
15.5 Nm
≤
95 mm
2
3
Ring cable lug
Premounted con-
nection pieces
M10
5