Catalogues - three-phase-asynchronous-motors

Catalogue Three-phase asynchronous motors

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Vibration behaviour

The permissible vibration intensities of electronic motors are specified in DIN EN 60034-14.

The vibration intensity stage N (normal) is achieved or bettered by VEM motors in the basic version. The vibration intensity

stages R (reduced) and S (special) are available at extra carge and depending on the type. Please consult the manufacturer.

According DIN EN 60034-14 the following intensities are recommended:


Vibration intensity	Speed range	Limit values of vibration velocity (mm/s)
stages	rpm	in frequency range 10 to 1000 Hz
		for sizes
		80-112	132-200	225-400
N	600-3600	1.8	2.8	3.5
(normal)
R	600-1800	0.71	1.12	1.8
(reduced)	above 1800-3600	1.12	1.8	2.8
S	600 -1800	0.45	0.71	1.12
(special)	above 1800-3600	0.71	1.12	1.8

All rotors are dynamically balanced with the half key inserted. This balancing is documented on rating plate with the letter H

behind the motor number, balancing with full key on request. In that case, the code letter behind the motor number will be F

Noise behaviour

Noise measurement is carried out according to DIN EN 23741/ 23742 at design output, design voltage and design frequency. In accordance with DlN EN 60034-9, the spatial mean value of the measurement area sound pressure level LpA measured at a distance of 1 m from the machine outline is stated as noise intensity in dB (A).

The A-sound power level L_WA across the measurement area dimension L_S (d = 1 m) is also quoted with

^LWA = ^LpA+ ^Ls(dB)

The measurement area dimensions are independent from the machine geometry and are for

Ls (dB)

12 13

size

63 - 132 160 - 225 250 - 315

355

The tabular value +4 dB (A) applies as an approximate value for motors in 60 Hz version. Binding data for 60 Hz are available on request.

The noise value for the basic types are quoted in tabular form. For special versions please refer to the manufacturer.

Ambient temperature

All VEM motors in the basic version can be used at ambient temperatures from -35 °C up to +40 °C.

Overload capacity

In compliance with DIN EN 60034-1, all motors can be exposed to the following overload conditions:

- 1.5 times the rated current for 2 min.

- 1.6 times the rated torque for 15 s (1.5 times for I_A/I_N < 4.5)

Both conditions apply to design voltage and design frequency.

Motor protection

The following motor protection versions are available as an option:

- motor protection with PTC thermistor sensors in the stator winding

bimetallic temperature sensor as NC contact or NO contact in the stator winding

resistance professional thermometer for monitoring the winding or bearing temperature on request