Connection, insulation resistance
Connection must only be made by an expert and in accordance with the valid safety regulations.
The relevant installation– and operating instructions as well as national and international rules have
to be observed.
Observe data on the rating plate!
Compare type of current, mains voltage and frequency!
Check wiring diagram!
Observe rated current for setting of the protective switch!
Connect motor in accordance with the wiring diagram provided in the terminal box!
The motor must be protected against excessive heating, e.g. by means of a motor protective
switch.
For earthing the motor is provided with an earthing terminal, which depending on the mounting ar-
rangement is either located on the frame resp. on the flange end shield. In addition all motors have
a protective conductor terminal inside the terminal box.
As protection against dust and humidity unused cable entries in the terminal box must have a tor-
sionproof seal. All terminal screws and nuts have to be securely tightened to avoid excessive
transition resistances (see paragraph 4.6).
Protective measures are to be taken.
In case of terminal boards with U–shaped terminal washers the
conductors to be connected have to be bent in U–shape and
placed underneath the terminal washers. See sketch!
In case of motors with terminal boxes which have ground surfaces between cover and base a thin
grease film is to be applied for sealing and against corrosion.
After longer storage periods or standstill (see page 18) the insulation resistance of the winding must
be measured phase against phase and phase against ground before putting into operation.
Humid windings might cause creeping currents, arcing and ruptures. In case of values
≤
1 k
Ω
per
Volt of rated voltage measured at a winding temperature of 20
°
C (68
°
F) the winding must be dried.
Cable–, lead entries and connecting cables must be suitable for ambient temperatures occur-
ring.
Rotational direction and designation of the terminals acc. to
DIN VDE 0530–8/IEC 60034–8
In standard design surface cooled (TEFC) motors up to frame size 355 and internally cooled
(ODP) motors up to frame size 315 are suitable for both directions of rotation.
Motors suitable for one rotational direction only are identified by an arrow on the motor for the
correct direction. Terminals U1, V1, W1 connected to phase L1, L2, L3 (in alphabetical se-
quence or natural sequence) always result in clockwise rotation. This rule applies to all motors,
even if they are not suitable for clockwise direction.
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C - SERIE BESTRIEBE- UND wARTUNGSANLEITUNG
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C - SERIE BESTRIEBE- UND wARTUNGSANLEITUNG
CHM - SERIES Maintenance and Sparepartlist
Installation ans commissioning
Stöwer Antriebstechnik GmbH, Enneststrasse 3, 51702 Bergneustadt, Tel. 02261-40970, Fax: 41309, www.stoewer-getriebe.de