MKHMF / MKJF / MKHJF / MCSF high-speed low-voltage motors for test stands up to 2200 kW, up to 10 000 rpm

MKHMF / MKJF / MKHJF / MCSF high-speed low-voltage motors for test stands up to 2200 kW, up to 10 000 rpm

Country: Austria · Model: MKHMF / MKJF / MKHJF / MCSF

Four series of low-voltage squirrel-cage induction motors for test stands, with a power up to 2200 kW, a voltage up to 690 V and a speed up to 10 000 rpm when powered from a VFD. They were developed for highly dynamic drives with a low moment of inertia.

Power: up to 2200 kW (MCSF up to 1500 kW)
Voltage: up to 690 V
Speed: up to 10 000 rpm with VFD (MCSF up to 3600 rpm)
IEC frame size: 200–500 (MKJF 280–630, MCSF 500–800)

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Technical specifications

Power	up to 2200 kW (MCSF up to 1500 kW)
Voltage	up to 690 V
Speed	up to 10 000 rpm with VFD (MCSF up to 3600 rpm)
IEC frame size	200–500 (MKJF 280–630, MCSF 500–800)
Cooling	MKHMF, MCSF — water jacket IC7A0W7; MKJF — IC06; MKHJF — air IC7A0W7
Degree of protection	up to IP55 (MKJF — IP23)
Insulation	F or H
Mounting	IM B3, B5, V1, B35
Starting	DOL, soft start, VFD
Features	low moment of inertia, vibration < 1.5 mm/s (test stand drives)

Specifications are taken from the manufacturer’s technical documentation. Updated 11/06/2026.

Description

MKHMF with a water jacket IC7A0W7 and air-cooled MKHJF have IEC frame sizes 200–500 and protection up to IP55. MKJF is a water-cooled open-type motor IC06, IP23, frame size 280–630, up to 2200 kW and 10 000 rpm. MCSF with a water jacket is designed for 1500 kW, frame size 500–800 and up to 3600 rpm. All series permit direct starting, starting through a soft starter and a VFD, are made in IM B3, B5, V1, B35 and special versions, with F or H insulation per IEC 60034 or NEMA MG1. For test stand drives, vibration below 1.5 mm/s is stated, which is needed for reproducible test cycles, along with an optimized moment of inertia for simulating transmission elements. Cooling can be made modular (water jacket, IC86W, IC70W or hybrid), and IP68 and ATEX are available. Water-cooled motors are compact, low-noise and release almost no heat into the room, while air-cooled ones do not need a water supply. They are used on engine and transmission test stands, roller brake, aircraft and wind power test stands, and in wind tunnels.

How to choose

First set the power and speed. Up to 2200 kW and 10 000 rpm, MKHMF, MKJF and MKHJF are suitable, while MCSF is limited to 1500 kW and 3600 rpm. If the stand has no water circuit, the air-cooled MKHJF is taken. When more power is needed, look at MKM / MKMF with water-air cooling up to 5000 kW (MKMF up to 10 000 rpm, frame sizes 400–630) or MKH with a water jacket up to 2500 kW.