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Електрически характеристики
Обща информация
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.
