Operating instructions
K3G450-AQ24-90
`
II 2G Ex db eb ib IIB T3 Gb
IBExU14ATEX1122 X /02
`
Translation of the original operating instructions
54004-4-8670
5.2.5 Leakage current
For asymmetrical power systems or if a phase fails, the
leakage current can increase to a multiple of the nominal value.
5.3 Connection in terminal box
5.3.1 Terminal box as supplied
The terminal box of the fan supplied by ebm-papst is equipped with the
following cable glands.
Wire
Outer
diameter of
wire
Terminal area
of terminal strip
Manufacturer
part number
(Hugro)
Supply
connection
M25 x 1.5
Ø 10 mm to Ø
16 mm
1.5 mm² to 4
mm²
154.2516.37
Control wire
M20 x 1.5
Ø 10 mm to Ø
14 mm
0.5 mm² to 1.5
mm²
154.2014.37
Screw plug
M20 x 1.5
-
-
548.20.14
5.3.2 Preparing cables for connection
Optionally, cables with or without shielding can be used. The two
illustrations that follow show the lengths to which the cables must be cut.
For correct wiring, note Chapter 5.3.3 Connecting wires to terminals.
Strip the cable only as much as necessary, and ensure that the cable
gland is sealed and there is no strain on the connections. For tightening
torques, see Chapter 4.1 Product drawing.
Fig. 2: Recommended stripped lengths in mm (inside terminal box) for
unshielded cables. In this illustration, all cable glands are used by way
of example. The illustration may differ from the actual device design.
Fig. 3: Recommended stripped lengths in mm (inside terminal box) for
shielded cables. In this illustration, all cable glands are used by way of
example.
5.3.3 Connecting wires to terminals
;
Open the terminal box.
;
To do so, unscrew the seven screws; for tightening torque, see
Chapter 4.1 Product drawing.
Take care when opening the terminal box cover. Do not
damage the terminal box seal by using tools to open it. A
protective earth is installed on the terminal box cover. This
connection must not be broken.
If the original screws of the terminal box cover have been lost, use
metric and corrosion-resistant screws; for size see Chapter 4.1 Product
drawing.
;
Remove the cap from the cable gland.
Use is only to be made of screw plugs with Ex e approval.
Any other form of sealing, e.g. by cables, is impermissible.
;
Use one sheathed cable for each cable gland.
;
Use copper wires only.
;
Check that the wires are clean.
;
Route the wire(s) (not included in scope of delivery) into the terminal
box.
The supply line (PE and L1 - L3) must always be routed
separately and must not be routed together with the control line.
Pay attention to the cross-sections of the strands and cable
glands.
If using shielded cables, the shielding has to be folded back
over the wire sheath and fixed under the strain relief clamps;
see the illustration "Strain relief for shielded cables".
;
First connect the "PE" (protective earth).
;
Connect the wires to the corresponding terminals.
Use a screwdriver to do so.
When connecting, ensure that no wire ends fan out.
Item no. 54004-5-9970 · ENU · Change 272968 · Approved 2022-11-22 · Page 12 / 18
ebm-papst Mulfingen GmbH & Co. KG · Bachmühle 2 · D-74673 Mulfingen · Phone +49 (0) 7938 81-0 · Fax +49 (0) 7938 81-110 · [email protected] · www.ebmpapst.com