MKH low-voltage water-jacketed induction motors up to 2500 kW, IE4 (MKH, MKH-DP, MKH-CHM, MKS)
Country: Austria · Model: MKH (MKH, MKH-DP, MKH-CHM, MKS)
Low-voltage three-phase squirrel-cage induction motors with a water-jacketed stator, with a power up to 2000–2500 kW for voltages up to 1000 V. Liquid cooling makes them more compact than air-cooled equivalents, and the noise is below 80 dB(A). The series has been made since 1973.
- Power
- up to 2000–2500 kW (MKS — up to 3000 kW)
- Voltage
- up to 1000 V (MKH IE4 — 690 V)
- Speed
- 0–3000 rpm with VFD (MKS 300–2000 rpm)
- IEC frame size
- 200–630 (MKH IE4 — 250–450)
Technical specifications
| Power | up to 2000–2500 kW (MKS — up to 3000 kW) |
|---|---|
| Voltage | up to 1000 V (MKH IE4 — 690 V) |
| Speed | 0–3000 rpm with VFD (MKS 300–2000 rpm) |
| IEC frame size | 200–630 (MKH IE4 — 250–450) |
| Housing | welded, stator with a water jacket (IC71W) |
| Efficiency | IE4 (MKH IE4 series up to 1000 kW) |
| Degree of protection | up to IP67 (MKS — up to IP65) |
| Insulation | class H |
| Noise | < 80 dB(A) |
| Mounting | IM B3, B35, B5, V1; MKH-DP — IM B34 |
| Standards | IEC 60034, CSA C22.2 No.100-14, UL 1004, NEMA MG1 |
Specifications are taken from the manufacturer’s technical documentation. Updated .
Description
Cooling water flows through the channels of the welded housing and removes heat directly from the stator, so the motor does not heat the air in the room and is protected from dust and moisture. The base series has IEC frame sizes 200–630, a speed of 0–3000 rpm with a frequency converter, a degree of protection up to IP67, class H insulation and IM B3, B35, B5, V1 versions. MKH IE4 is designed for 690 V and up to 1000 kW, up to 3600 rpm, and the frame sizes 250–450 have an unchanged shaft height, so the motor is installed in place of an old one without reworking the foundation. According to the manufacturer's calculation, compared with IE3 it pays back in about 2.5 years at 8000 h per year and 0.15 €/kWh. MKH-DP up to 1000 kW, frame sizes 200–450, IM B34, one or two shaft ends, is intended for direct drive of hydraulic pumps. MKH-CHM up to 450 kW at 690 V, frame sizes 280–400, IM B5, has a hollow shaft for a safety coupling and brake. MKS of frame size 630 with an additional internal cooling circuit gives up to 3000 kW at 300–2000 rpm and IP65. Built to IEC 60034, CSA C22.2 No.100-14, UL 1004 or NEMA MG1. The motors are installed on extruders, test stands, hydraulic units of tunnel boring machines, marine PTO/PTI systems and nuclear power plant pumps. The manufacturer's overview states frame sizes of 200–500.
How to choose
The main selection parameters are power, frame size and shaft version. For an ordinary drive take the base MKH, for replacing an IE3 motor without changing the shaft height MKH IE4, for hydraulic pumps MKH-DP, and for a drive with a safety coupling MKH-CHM. If more than 2500 kW is needed, look at MKS up to 3000 kW. For a magnet-free IE5 drive up to 500 kW there are water-jacketed synchronous reluctance motors, and for speeds up to 10 000 rpm the MKHMF / MKJF / MKHJF / MCSF series.
Request a price and lead time
MKH low-voltage water-jacketed induction motors up to 2500 kW, IE4 (MKH, MKH-DP, MKH-CHM, MKS). We reply within one business day.
Or email office@usk.ua or call +38 (044) 339-50-20.
FAQ
What is the maximum power of MKH water-jacketed motors?
The base series is designed for 2000–2500 kW, and MKS of frame size 630 gives up to 3000 kW.
What is the supply voltage of MKH IE4?
MKH IE4 is designed for 690 V and up to 1000 kW, frame sizes 250–450. The other versions work on voltages up to 1000 V.
How does MKH-DP differ from the base MKH?
MKH-DP is up to 1000 kW, frame sizes 200–450, IM B34, has one or two shaft ends and is intended for direct drive of hydraulic pumps.
What are the noise level and degree of protection?
The noise level is below 80 dB(A), the degree of protection up to IP67, and for MKS up to IP65.
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Need a price, lead time or replacement?
Send us a request and we will confirm the configuration, lead time and delivery terms. We reply by email.