4MT Series Crane Motors

| Drawings

4MT series crane motors with phase-wound (4MTM) and short-circuited (4MTKM) rotors are powered by 50 or 60 Hz electric mains with 220/380, 230/400, 240/415, 380/660, 380, 415 or 500 voltages. They can be used in any sector of the national economy.
These motors are used in residential or capital construction, in power engineering and in the transport, mineral resource and metallurgy industries. They are also used as components in tower cranes, in travelling gantry cranes, in portal cranes, and in bridge and other cranes. They are manufactured in either single- or double-speed construction.
Erection construction types include IM1003, IM1004 (on legs).
Climatic construction types include U1, U2, UHL1, UHL2, T1, T2.
Embodiment: IM 1003, IM1004 according to GOST 2479-79.
Protection rate IP54.
Operating mode: intermittent cycle S3 - PV40% according to GOST 183-74. These motors can operate in other modes: S3 - 15, 25, 60, 100%, short-time duty S2 - 30 and 60 min.
Vibration class: 2.8 for 4MT(K)M200, 225; 4.5 for 4MTM280 according to GOST 16921-83.
Voltage: 220, 380, 660 V and other standard voltages with 1=50 or 60Hz.
Isolation class: "H" according to GOST 8865-87.

Brief design description:

These electric motors are constructed of cast-iron casings with vertical and horizontal ribbing. End brackets are also constructed of cast-iron. The terminal box is located on top and allows power supply from any side of the motor. The cables leading to the phase-wound rotor coils can be entered into the end bracket opening on any side of the motor. The fan has steel cowling and is constructed of aluminium alloy.

Basic motor specifications