2 87hz characteristic curve (only 400v devices) – NORD Drivesystems BU0200 User Manual
Page 296
9 Additional Information
BU 0200 GB-4411
Subject to technical alterations
295
9.9.2
87Hz characteristic curve (only 400V devices)
( Adjustment range 01:17:00)
The 87Hz characteristic curve is an extension of the
speed adjustment range with a constant rated
torque for the motor. In order to implement this, the
following points must be fulfilled:
Delta motor circuit with 230/400V motor
windings
Frequency inverter with an operating voltage
of 3~400V
The output current of the frequency inverter
must be greater than the delta current of the
motor used (Guide value frequency inverter
power
3 x motor power)
In this configuration the motor has a rated operating point at 230V/50Hz and an extended operating point at
400V/87Hz. This increases the power of the drive unit by a factor of
3. The rated torque of the motor
remains constant up to a frequency of 87Hz. Operation of the 230V winding with 400V is not critical, as the
insulation is designed for a test voltage of >1000V.
NOTE: The following motor data applies for standard motors with 230/400V windings.
Frequency inverter type
Parameterisation data for frequency inverter
F
N
[Hz] n
N
[min
-1
]
I
N
[A]
U
N
[V]
P
N
[kW]
cos
Circuit
R
St
[
]
SK…71S/4 TI 4 - SK 2xxE-550-340-A
50
1380
1,32
230
0,25
0,77
Delta
36,50
SK…71L/4 TI 4 - SK 2xxE-750-340-A
50
1360
1,91
230
0,37
0,75
Delta
23,80
SK…80S/4 TI 4 - SK 2xxE-111-340-A
50
1375
2,63
230
0,55
0,73
Delta
15,10
SK…80L/4 TI 4 - SK 2xxE-151-340-A
50
1375
3,64
230
0,75
0,74
Delta
10,20
SK…90S/4 TI 4 - SK 2xxE-221-340-A
50
1385
4,81
230
1,1
0,78
Delta
6,28
SK…90L/4 TI 4 - SK 2xxE-301-340-A
50
1385
6,30
230
1,5
0,80
Delta
4,37
SK…100L/4 TI 4 - SK 2xxE-401-340-A
50
1440
9,03
230
2,2
0,74
Delta
2,43
SK…100LA/4 TI 4 - SK 2xxE-551-340-A
50
1410
12
230
3,0
0,8
Delta
1,81
SK…112M/4 TI 4 - SK 2xxE-751-340-A
50
1445
14,4
230
4,0
0,8
Delta
1,14
Frequency inverter type
Power data at rating point
P
B
[kW]
n
B
[min
-1
]
M
B
[Nm]
SK…71S/4 TI 4 - SK 2xxE-550-340-A
0,43
2475
1,65
SK…71L/4 TI 4 - SK 2xxE-750-340-A
0,64
2455
2,49
SK…80S/4 TI 4 - SK 2xxE-111-340-A
0,95
2470
3,67
SK…80L/4 TI 4 - SK 2xxE-151-340-A
1,3
2470
5,01
SK
…90S/4 TI 4 - SK 2xxE-221-340-A
1,9
2480
7,32
SK…90L/4 TI 4 - SK 2xxE-301-340-A
2,6
2480
10,01
SK…100L/4 TI 4 - SK 2xxE-401-340-A
3,8
2535
14,32
SK…100LA/4 TI 4 - SK 2xxE-551-340-A
5,2
2505
20,1
SK…112M/4 TI 4 - SK 2xxE-751-340-A
6,9
2540
26,1
87 Hz characteristic curve (4-pole motor)
0
0,2
0,4
0,6
0,8
1
1,2
0
10
20
30
40
50
60
70
80
90
100
Frequenz / Hz
M/Mn
M/M
N
P/P
N
0
1445
2890
Frequency
[Hz]
Speed
[1/min]