MKM / MKMF — low-voltage air–water cooled induction motors up to 5000 kW
Country: Austria · Model: MKM / MKMF
Large low-voltage three-phase squirrel-cage induction motors with an air–water heat exchanger, rated up to 5000 kW. The MKM series works up to 1000 V and 3600 rpm, and the high-speed MKMF up to 690 V and 10 000 rpm. The motors are used where the drive is fed by a low-voltage frequency converter and there is no high-voltage network.
- Power
- up to 5000 kW
- Voltage
- MKM up to 1000 V; MKMF up to 690 V
- Rotational speed
- MKM up to 3600 rpm; MKMF up to 10 000 rpm
- IEC frame size
- MKM 355–710; MKMF 400–630
Technical specifications
| Power | up to 5000 kW |
|---|---|
| Voltage | MKM up to 1000 V; MKMF up to 690 V |
| Rotational speed | MKM up to 3600 rpm; MKMF up to 10 000 rpm |
| IEC frame size | MKM 355–710; MKMF 400–630 |
| Cooling | MKM — IC81W (TEAWC); MKMF — IC86W |
| Starting | DOL, soft start, frequency converter |
| Protection degree | up to IP55 |
| Insulation | F or H |
| Mounting | IM B3, V1 (MKMF also B5, B35) |
| Special versions | ATEX, IECEx, marine, nuclear power plants (MKM) |
Specifications are taken from the manufacturer’s technical documentation. Updated .
Description
A totally enclosed motor with an air–water cooler gives, at low voltage, a power that usually only high-voltage machines have. The MKM series has IEC frame sizes 355–710, IC81W (TEAWC) cooling, IM B3 (IM1001) and IM V1 (IM3011) mounting versions, a protection degree up to IP55 and class F or H insulation. The MKMF is built for high speeds with frame sizes 400–630, IC86W cooling with additional ventilation and IM B3, B5, V1, B35 mounting. Direct starting, soft starting and operation from a frequency converter are allowed. The motors are made to IEC 60034 or NEMA MG1 and, on request, are certified for hazardous areas (ATEX, IECEx), marine use and nuclear power plants. Temperature sensors for the windings and bearings are included. In ship drives, machines of 150–8000 kW at 400–11 000 V are used. In the manufacturer's catalogue the MKM line is part of a single range for 0.4–15 kV with power up to 35 000 kW, where the high-voltage part HKM is shown as a separate item.
How to choose
First choose the rotational speed. Up to 3600 rpm and 1000 V, the MKM is suitable, and for high-speed test rigs and extruders up to 10 000 rpm the MKMF at 690 V is used. The second criterion is the cooling method: here it is air–water, so a cooling water line is needed. For a water jacket without a heat exchanger, consider the MKH up to 2500 kW, IE4, 690 V, or a synchronous reluctance motor IE5 up to 500 kW. For test rigs up to 2200 kW there are the MKHMF and MKJF.
Request a price and lead time
MKM / MKMF — low-voltage air–water cooled induction motors up to 5000 kW. We reply within one business day.
Or email office@usk.ua or call +38 (044) 339-50-20.
FAQ
What maximum power do MKM and MKMF motors have?
Both series are rated for power up to 5000 kW. MKM works at voltages up to 1000 V, MKMF up to 690 V.
Up to what rotational speed does MKMF work?
MKMF is rated for a rotational speed of up to 10 000 rpm when fed from a frequency converter. For MKM the limit is 3600 rpm.
What type of cooling do MKM and MKMF motors have?
MKM uses IC81W (TEAWC), a totally enclosed motor with an air–water cooler. In MKMF it is IC86W with additional ventilation.
Can MKM be started directly from the mains?
Yes, direct starting (DOL), soft starting and operation from a frequency converter are allowed. The protection degree is up to IP55, with class F or H insulation.
Are there explosion-proof and marine versions of MKM?
The motors are available with ATEX and IECEx certification, for marine use and for nuclear power plants (MKM). The design follows IEC 60034 or NEMA MG1.
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