Georgii Kobold 3-Phase Two-Speed Gear Motor, 0.30/0.43 kW, 400V, 1400/2800 RPM, IP54, with Inline Gear Reducer

This is a Georgii Kobold three phase, two speed gear motor made in Germany. Georgii Kobold is a German maker of AC motors and gear motors for industrial equipment. The nameplate is marked Nr. 502811.

The nameplate rates the motor at 400 V, 0.30 / 0.43 kW, 0.82 / 1.10 A and 1400 / 2800 rpm, connected delta for low speed and double star for high speed. This is a Dahlander style pole changing winding, which gives two fixed speeds in a 1 to 2 ratio from a single winding by switching the connection. The plate also lists insulation class F, IP 54 protection, VDE 0530 and tropical insulation for humid climates.

Two speed motors let a machine run a fast traverse and a slow feed, or a high and low conveyor or fan speed, without a variable frequency drive. The motor is coupled to a gear reducer, which multiplies torque and lowers output speed for the driven machine. Machine rebuilders and maintenance departments use gear motors like this to replace original drives. Buyers should confirm the reducer ratio and output shaft against their application.

Available from King Surplus inventory in Del Rio, Texas.

• Nameplate number: Nr. 502811
• Motor: 3 phase, two speed
• Connection: delta / double star (low / high speed)
• Voltage: 400 V
• Power: 0.30 / 0.43 kW (approx. 0.40 / 0.58 HP, fractional)
• Current: 0.82 / 1.10 A
• Speed: 1400 / 2800 rpm
• Frequency (as marked): 50 // 60 Hz
• Insulation class: F
• Protection: IP 54
• Standard: VDE 0530
• Tropical insulation (Tropenisolation)
• Country of origin (nameplate): Germany
• Spec Basis: Georgii Kobold nameplate (photo). No published datasheet found for this unit. FLAG for review: no type designation on the plate, record model 502811 is the plate Nr.; reducer carries no readable plate, Sumitomo Cyclo in the title is not confirmed by the photos