|
Voltage and frequency
The low voltage motors in this catalogue are delivered for a standard voltage of 230, 400 or 690V according to DIN IEC 38 or for a rated voltage on 50Hz systems.
The motors can run with the variations envisaged in normal operational areas at a voltage of ±5% and frequency of ±2%.
Furthermore, the motors can be used in the operational area with restrictions (variation in voltage of ±10% and frequency of ±3%) as long as the indications given by norm 60034-1 are complied with.
Increased voltage & frequency (60Hz systems)
If the motors are supplied with increased voltage in proportion to the rated frequency (e.g. 480V/60Hz instead of 400V/50Hz), then:
The rated power and speed are increased by 20%
All other values remain unchanged
Of course, 480V is not a common voltage. In most cases, 60Hz systems works with a voltage of 440V. Hence, not all motors can accommodate a power increase of 20%. For an estimate, it should be assumed that the power increase is only 15%.
Output
The rated outputs and operating characteristics given in the performance data refer according to IEC 60034-1 to:
- Continuous duty S1
- Frequency of 50Hz
- Rated voltage
- Maximum ambient temperature of 40°C
- Maximum height of installation of 1000m above sea level
Motors can also be operated in ambient temperatures above 40oC (up to 60°C) or at altitudes higher than 1,000 m but in these cases, derating has to be calculated. [Please consult our engineering department for such cases].
Efficiency and power factor at partial load
The efficiency and power factor values shown in the performance data refer to rated output at 50Hz.
Values at partial load are given below for reference only:
| Efficiency in % at |
| 1/2 |
3/4 |
4/4 |
5/4 |
| Of the full load |
| 94 |
95 |
96 |
95 |
| 93 |
94 |
95 |
94 |
| 92 |
93 |
94 |
93 |
| 91 |
92 |
93 |
92 |
| 91 |
92 |
92 |
91 |
| 89 |
91 |
91 |
90 |
| 88 |
90 |
90 |
88 |
| 87 |
89 |
89 |
87 |
| 86 |
88 |
88 |
86 |
| 85 |
87 |
87 |
84 |
| 85 |
86 |
86 |
84 |
| 84 |
86 |
85 |
83 |
| 83 |
85 |
84 |
82 |
| 82 |
84 |
83 |
81 |
| 80 |
82 |
82 |
80 |
| 79 |
81 |
81 |
79 |
| 78 |
80 |
80 |
78 |
| 77 |
79 |
79 |
77 |
| 75 |
78 |
78 |
76 |
| 74 |
77 |
77 |
75 |
| 73 |
76 |
76 |
74 |
| 72 |
75 |
75 |
73 |
| 71 |
74 |
74 |
72 |
| 70 |
73 |
73 |
71 |
| 68 |
72 |
72 |
70 |
| 67 |
71 |
71 |
69 |
| 66 |
70 |
68 |
68 |
| 65 |
69 |
67 |
67 |
| 64 |
67 |
66 |
66 |
| 62 |
66 |
65 |
65 |
| 61 |
65 |
64 |
64 |
| 60 |
64 |
63 |
63 |
| 59 |
63 |
62 |
62 |
|
|
| Power factor at |
| 1/2 |
3/4 |
4/4 |
5/4 |
| Of the full load |
| 0.85 |
0.91 |
0.93 |
0.93 |
| 0.84 |
0.90 |
0.92 |
0.92 |
| 0.81 |
0.88 |
0.91 |
0.91 |
| 0.80 |
0.87 |
0.90 |
0.91 |
| 0.77 |
0.86 |
0.89 |
0.90 |
| 0.75 |
0.84 |
0.88 |
0.89 |
| 0.73 |
0.83 |
0.87 |
0.88 |
| 0.71 |
0.81 |
0.86 |
0.88 |
| 0.69 |
0.80 |
0.85 |
0.87 |
| 0.68 |
0.79 |
0.84 |
0.87 |
| 0.67 |
0.78 |
0.83 |
0.86 |
| 0.65 |
0.77 |
0.82 |
0.85 |
| 0.64 |
0.75 |
0.81 |
0.85 |
| 0.62 |
0.74 |
0.80 |
0.84 |
| 0.61 |
0.72 |
0.79 |
0.83 |
| 0.60 |
0.71 |
0.78 |
0.82 |
| 0.58 |
0.70 |
0.77 |
0.81 |
| 0.57 |
0.69 |
0.76 |
0.80 |
| 0.55 |
0.67 |
0.75 |
0.79 |
| 0.54 |
0.66 |
0.74 |
0.79 |
| 0.53 |
0.65 |
0.73 |
0.78 |
| 0.52 |
0.63 |
0.72 |
0.77 |
| 0.50 |
0.62 |
0.71 |
0.76 |
| 0.49 |
0.61 |
0.70 |
0.75 |
| 0.48 |
0.59 |
0.69 |
0.74 |
| 0.47 |
0.58 |
0.68 |
0.74 |
| 0.46 |
0.57 |
0.67 |
0.73 |
| 0.45 |
0.56 |
0.66 |
0.72 |
| 0.44 |
0.55 |
0.65 |
0.71 |
| 0.43 |
0.54 |
0.64 |
0.70 |
| 0.42 |
0.53 |
0.63 |
0.69 |
| 0.41 |
0.52 |
0.62 |
0.68 |
| 0.40 |
0.51 |
0.61 |
0.67 |
|
Space heater
Upon request all motors, can be equipped with a space heater to protect the inside of the motor against condensed water. Usually rated voltage of this heater is 230V, but on request any low voltage is possible (e.g. 110V). Space heater must be turned on when the motor is stoped and must be switched off during motor operation. Alternatively, it is possible to heat the stator by applying a low single phase voltage to terminals U1 and V1. (5-10% of the rated motor voltage).
|
Frame size
|
Heater power [W]
|
| 56 |
10 |
| 63 |
12 |
| 71 |
15 |
| 80 |
20 |
| 90 |
25 |
| 100 |
30 |
| 112 |
40 |
| 132 |
50 |
| 160 |
120 |
| 180 |
180 |
| 200 |
200 |
| 225 |
200 |
| 250 |
220 |
| 280 |
250 |
| 315 |
280 |
| 355 |
300 |
| 400 |
350 |
Protection devices
In order to protect a motor winding against thermal overloads one of the following devices can be provided:
Bimetallic type device:
It consists of 3 motor protectors connected in series. The contact is normally closed; the disc opens when the windings temperature reaches limits dangerous for the insulation system.
On request, normally open device are available.
PTC temperature sensor (thermistors) [standard for K-series]
3 sensors connected in series embedded in stator windings. (1 sensor/phase).
Once reached the operating temperature, this device quickly changes the resistance. It is connected to a suitable relay device (not part of our scope of supply).
PT100 thermometric resistors
The resistance value of this device varies according to the windings temperature.
It is suitable for continuous monitoring of the windings temperature. For motors up to frame 355 usually 3xPT100s are used (1 per phase).
For larger motors, 6xPT100s are used. (1set of 3 in the DE winding side a set of 3 in the NDE winding side).
PT100s, are also very common for the temperature monitoring of the motor bearings.
Upon request, we can install PT100 for both bearings of a motor.
All above devices have their separate terminal block in the main terminal box of the motor. Upon request, it is possible to have separate terminal box. | 
