Grundfos SP 1100S, Installation And Operating Instructions Manual

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Maximum peak voltage and dU/dt for Grundfos submersible motors
Motor series Maximum U
peak
voltage Maximum dU/dt
MS 402 650 V phase-phase 2000 V/micro s.
MS 4000 850 V phase-phase 2000 V/micro s.
MS 6000/MS 6000P 850 V phase-phase 2000 V/micro s.
MMS6 850 V phase-ground 500 V/micro s.
MMS 8000 850 V phase-ground 500 V/micro s.
MMS 10000 850 V phase-ground 500 V/micro s.
For asynchronous motors:
Permissible frequency ranges:
•
30-50 Hz
• 30-60 Hz.
Ramp times: maximum 3 seconds from standstill to minimum
frequency and vice versa.
For synchronous motors MS6000P:
Permissible frequency ranges:
•
55-100 Hz
• 55-120 Hz.
Ramp times: maximum 3 seconds from standstill to minimum
frequency and vice versa.
Depending on the type, the frequency converter may cause
increased acoustic noise from the motor. Furthermore, it may
expose the motor to detrimental voltage peaks. This can be abated
by installing an LC filter or a sinus filter between the frequency
converter and the motor.
For further details, contact your frequency converter supplier or
Grundfos.
4 3 2 1
5
6
TM066056
Location of the sine-wave filter in the system
Pos. Description
1 Sine-wave filter
2 Motor
3 VFD
4 379 V or greater incoming power
5 Cable length from VFD to motor
6 0 to 1500 ft (0 to 457 m)
For further details, contact your VFD supplier or Grundfos.
6.7.4 Setting up the CUE frequency converter in an SPE system
The SPE system consists of the following:
•
SPE pump set
• sine-wave filter
• CUE frequency converter.
The CUE has a start up guide. Follow the instructions on the
display.
For further information regarding safety and advanced settings, see
the CUE Installation and operating instruction.
QR96780034
Installation and operating instructions
http://net.grundfos.com/qr/i/9780034
17
English (US)