Water-cooled motors:

1RN4, 1RN6 

Air-cooled motors:

1RQ4, 1RQ6 

Open-circuit ventilated motors:

1RA4, 1RA6, 1RP6 

Shaft heights:

450, 500, 560 mm

Power range:

720 … 4000 kW

No. of poles:

4 … 8 poles

Rated voltages:

690 V

Drive converters:

Degree of protection:

IP55 (1RN4, 1RQ4, 1RN6, 1RQ6)
IP23, WP II (1RA4, 1RA6, 1RP6)

Cooling type:

IC 01 (1RA4, 1RA6)
IC 611 (1RQ4, 1RQ6)
IC 81 W (1RN4, 1RN6)

Type of construction:

IM B3 (IM 1001), IM V1 (IM 3011)

Enclosure:

gray cast iron enclosure

Bearings:

Roller bearings, electric insulated on NDE-side

Regulations/Standards:

IEC, EN
NEMA, API
Specifications, e.g. shipbuilding

Explosion protection:

• Non sparking, Zone 2, II 3 G Ex nA II C T3 Gc
• Pressurized, Zone 1, II 2 G Ex px II C T3 Gb