Table of Contents
Advertisement
s
4.3 Electric installation
4.3.1 Making the electrical connections
(cable terminal compartment for stator connection)
The electrical connections inside the machine are made at the factory, taken to the cable terminal
compartment for the stator connection (see text to dimension drawing) and subjected to an HV winding test.
To make the stator connections, open the cable terminal compartment and the marked earthing terminals in
the cable terminal compartment and the conductor clamp. The terminals are designed to receive cable lugs see
(Fig.
13). Connect the supply lead in accordance with the main terminal diagram, pay attention to the right
direction of rotation (see text to dimension drawing). The conductors should make good electrical contact,
which entails the contact surfaces should be free from irregularities the contact surfaces should be metallic-
bright (i.e. treat the surfaces with a clean, mediumfine steel-wire brush, dirt and oxidation should be removed)
the contact surfaces should be greased with acid-free vaseline the connecting elements should be carefully
assembled and tightened with the specified torque
The factory recommends making the connections as shown in
02
03
01
04
Fig. 13 Recommended stator terminal arrangement
The bolts are to be tightened with a torque wrench. The tightening torques for electrically conducting con-
nection bolts are shown in
sheaths (see dimension drawing). The connections and sealing ends should comply with the local regulations.
Size of connection elements
Material
Strength class
Tightening torques in Nm
Tab. 6 Tightening torques for screwed electrical connections
The cable entry of the cable terminal compartment is closed off by a plate of insulating material (see dimension
drawing).
The holes required for entering the cables must be drilled during installation in accordance with the cable
clamps used.
The cable entry point must be suitably sealed on completion of cable installation.
Before closing the cable terminal compartment, check that the screwed electrical connections have been
made properly the inside of the cable terminal compartment is clean and free from trimmed-off ends of wiring
material the minimum air clearances are adhered to in accordance with the local regulations, taking account of
protruding ends of bolts and conductors unused cable entries are closed and their connecting elements are
securely screwed in.
As an example,
(Tab.
7) lists the minimum air clearances laid down in DIN EN 60079-7 (VDE 0170-6).
Product documentation 1D 3.8.en
01
02
03
04
05
05
03
01
02
(Tab.
6). Connections are provided in the terminal box for earthing the cable
M10
St
8.8
40
Rev. E, 10/13
(Tab.
6).
(Fig.
13)
Incoming cable to stator terminal
Cable lug to DIN 46235
Terminal in terminal box (ready drilled to receive 16 mm or
20 mm dia bolt)
Fixing elements
Hexagonal bolt, DIN EN 24017 (ISO4017), 8.8-A-A3C
Hexagonal nut 6, DIN EN 24032 (ISO4032), 8-A-A3C
Spring washer , DIN 128, spring steel Washer, DIN 125, St-
A3C
Conical spring washer, DIN 6796, spring steel Washer,
SN 62501, St-A3C
M12
St
8.8
70
M16
M20
St
St
8.8
8.8
155
340
page 29/42
Advertisement
Table of Contents
