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Motors for Nuclear Power Plants 

AIR-80B8Y2.jpgInduction motors of AIRB71A1, AIRB80A1 and AIRB100A1 series   

Special-purpose induction motors AIRB71A1, AIRB80A1 and AIRB100A1 are manufactured in accordance with technical specifications 16-91. Motors are designed for electric drives in containment areas of NPP, for frequency of 50Hz, for national economy needs and for export with frequency of 50Hz and 60Hz.

Motors meet the requirements of GOST 183-74, “OTT-87. Armature for equipment and pipelines of NPP. General specifications”, “Special terms of delivery of equipment, appliances, materials and products for nuclear power facilities”.

Rated operating mode is intermittent periodic duty (S3) according to GOST 183-74 with duty cycle (DC) of 10% and with six start-ups per hour.

Protection degree through the shaft line is IP55, of motor and current lead design is IPX7 according to GOST 17494-87.

Cooling method is IC0040 according to GOST 20459-87.

Operating conditions of the motors must correspond to mechanical environment stability M5 according to GOST 1716.1-90.

Induction motors of 4AS71A5-4AS100A5  series

Induction motors 4AS71A5-4AS100A5 are manufactured in accordance with technical specifications 16-510.610-76. Motors are designed for operation in armature drives mounted under the containment vessel of the NPP, which can be located in any climate area in accordance with GOST 15150-69. Motors meet the requirements of GOST 183-74.  

Due to the mounting arrangement the motors are designed in a unified design IM3081 in accordance with GOST 2479-79.

Rated operating mode is temporary duty (S2), 6 min, according to GOST 183-74. Motors must be sealed. Protection degree is IPX7 according to GOST 14254-96 and IP55 through the shaft line according to GOST 17494-87.

Induction motors of 4AKh71A4A1, 4AKhS71V4A1 and 4AS100S4A1 series

Induction motors 4AKh71A4A1, 4AKhS71V4A1 and 4AS100S4A1 are manufactured in accordance with technical specifications 16-513.351-74. Motors are designed for AC power supply, 220V/380V, 50Hz, and for operation in equipment and armature drives mounted under the containment vessel of Loviisa NPP in Finland. Motors meet the requirements of GOST 183-74 and OST 16 0.510.010-86.

Motors are designed in unified mounting arrangements IM3001 and IM3031 in accordance with GOST 2479-79. Rated operating mode according to GOST 183-74 is:

• continuous duty (S1) for motors 4AKh71A4A1

• temporary duty (S2), 6 min, for motors 4AKhS71V4A1 and 4AS100S4А1

Motors 4AKh71A4A1 are designed for operation at the lowest volume with environment parameters inside the containment vessel, which correspond to the rated operating mode and must ensure safe operation after the conditions of “small” accident according to OST 16 0.510.010-86. Motors 4AKhS71V4A1 and 4AS100S4A1 are designed for operation at the lowest volume with environment parameters inside the containment vessel, which correspond to the rated operating mode and mode of “small” accident according to OST 16 0.510.010-86.

After the conditions of “large” accident the motors must ensure safe operation after revision, drying and minor repairing.



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