NORD Drivesystems BU0300 - Manual (Page 133)

10 Motor data
BU 0300 EN Subject to technical alterations 133
10.2 Motor data rated point 87Hz (400V devices only)
The 87 Hz characteristic represents an extension of the speed adjustment range with a constant motor
nominal torque. The following points must be met for realisation:
• Motor delta connection with a motor winding for 230/400V
• Frequency inverter with an operating voltage 3~400V
• Output current of frequency inverter must be greater than the delta current of the motor used
(ref. value Æ frequency inverter power ≥ √3 x motor power)
In this configuration, the motor used has a rated operating point at 230V/50Hz and an extended operating point
at 400V/ 87Hz. This increases the power of the drive by the factor
√3. The nominal torque of the motor remains
constant up to a frequency of 87 Hz. Operation of a 230 V winding with 400 V is totally uncritical as the
insulation is designed for test voltages of > 1000 V.
NOTE: The following motor data applies to standard motors with 230V/400V windings.
Frequency inverter type
Parameterisation data of frequency inverter
F
N
[Hz]
n
N
[min -1 ]
I
N
[A]
U
N
[V]
P
N
[kW]
cos ϕ Connection
R
St
[ Ω]
SK…71S/4 TI 0/1 D -SK 300E-550-340-B 50 1380 1.32 230 0.25 0.77 Delta 36.50
SK…71L/4 TI 0/1 D -SK 300E-750-340-B 50 1360 1.91 230 0.37 0.75 Delta 23.77
SK…80S/4 TI 0/1 D -SK 300E-111-340-B 50 1375 2.63 230 0.55 0.73 Delta 15.10
SK…80L/4 TI 0/1 D -SK 300E-151-340-B 50 1375 3.64 230 0.75 0.74 Delta 10.20
SK…90S/4 TI 0/1 D -SK 300E-221-340-B 50 1385 4.81 230 1.1 0.78 Delta 6.28
SK…90L/4 TI 0/1 D -SK 300E-301-340-B 50 1385 6.30 230 1.5 0.80 Delta 4.67
SK…100L/4 TI 0/1 D -SK 300E-401-340-B 50 1440 9.03 230 2.2 0.74 Delta 2.43
Frequency inverter type
Performance data at rated point
P
B
[kW] n
B
[min -1 ] M
B
[Nm]
SK…71S/4 TI 0/1 D -SK 300E-550-340-B 0.43 2475 1.65
SK…71L/4 TI 0/1 D -SK 300E-750-340-B 0.64 2455 2.49
SK…80S/4 TI 0/1 D -SK 300E-111-340-B 0.95 2470 3.67
SK…80L/4 TI 0/1 D -SK 300E-151-340-B 1.3 2470 5.01
SK…90S/4 TI 0/1 D -SK 300E-221-340-B 1.9 2480 7.32
SK…90L/4 TI 0/1 D -SK 300E-301-340-B 2.6 2480 10.01
SK…100L/4 TI 0/1 D -SK 300E-401-340-B 3.8 2535 14.32
Kennlinie 87 Hz (4-poliger 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]
Characteristic 87 Hz (4 pole motor)