IEC-Normmotoren (W.1R/K21R) low-voltage induction motors IE1–IE3 0.06–315 kW

Country: Germany · Model: IEC-Normmotoren W.1R/K21R

Low-voltage three-phase squirrel-cage induction motors rated 0.06–315 kW, frames 56–315, efficiency classes from IE1 to IE3. Cast iron frame, protection degree IP55, class 155 (F) winding. Fitted to pumps, fans, compressors and conveyors, and also in place of AIR, 5A and 4A motors.

Frame: 56–315
Power: 0.06–315 kW
Efficiency: unclassified, IE1, IE2, IE3 (VO(EC) 640/2009)
Speed: 3000…500 rpm; multi-speed (Dahlander, 2 windings, 3–4 speeds)

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Technical specifications

Frame	56–315
Power	0.06–315 kW
Efficiency	unclassified, IE1, IE2, IE3 (VO(EC) 640/2009)
Speed	3000…500 rpm; multi-speed (Dahlander, 2 windings, 3–4 speeds)
Protection degree	IP55, optionally IP56, IP65
Cooling	IC411, IC416, IC410, IC71W
Insulation	155 (F) with margin, optionally 180 (H)
Mounting	IM B3, B35, B5, B14, B34
Housing	grey cast iron
Coolant temperature	−20…+40 °C, optionally −40…+60 °C
Mounting dimensions	DIN 42673, 42677

Specifications are taken from the manufacturer’s technical documentation. Updated 11/09/2026.

Description

The series is designed to EN 60034 (IEC 60072), so the motors are interchangeable with machines of other manufacturers. Powers are matched to frames per DIN 42673, 42677 or the progressive series. Protection degree IP55 is standard, and IP56 or IP65 is available on request. The class 155 (F) winding has a thermal margin, and class 180 (H) is available as a choice. The terminal box can be placed on top, on the right or on the left. Mounting versions are IM B3, B35, B5, B14 and B34 per EN 60034-7, cooling IC411, IC416, IC410 or IC71W. Coolant temperature is −20…+40 °C, optionally −40…+60 °C, up to 120 °C on request. The motors are suitable for supply from a frequency converter, and the optional RFID transponder iID 2000 stores nameplate data on the motor itself.

How to choose

Start with the speed. The standard range is 3000, 1500, 1000, 750, 600 and 500 rpm, and for machines with several speeds there is a Dahlander winding (4-2, 8-4, 12-6 poles) or two separate windings (6-4, 8-2, 8-6, 12-4). Next determine the efficiency class. The catalogue has unclassified, IE1, IE2 and IE3 versions, and IE3 and higher is recommended for new installations. If a slip-ring rotor is needed, see the S..R/SPR series at 2.2–315 kW, and a motor with a built-in frequency converter at 0.37–30 kW is made as VEMoDRIVE Compact.

Request a price and lead time

IEC-Normmotoren (W.1R/K21R) low-voltage induction motors IE1–IE3 0.06–315 kW. We reply within one business day.

Or email office@usk.ua or call +38 (044) 339-50-20.

FAQ

What efficiency classes are available for this series?

Unclassified, IE1, IE2 and IE3 per IEC 60034-30, taking into account regulation VO(EC) 640/2009. For new projects the manufacturer recommends IE3 and higher.

What protection degree do IEC-Normmotoren have?

IP55 as standard, IP56 or IP65 on request. Cooling is IC411, IC416, IC410 or IC71W as chosen.

Can such a motor be fed from a frequency converter?

Yes, the series is suitable for operation from a converter. If the converter is needed as part of the motor, there is a version with a built-in converter at 0.37–30 kW.

What motors does this series replace?

General-industry motors AIR, 5A and 4A. Before replacement, check the frame, power and mounting version, for example IM B3 or IM B5.

What coolant temperature range is permissible?

As standard from −20 to +40 °C, optionally from −40 to +60 °C, up to 120 °C on request.