JK, JS, JR, JS2, JR2, JSL, JRL series medium-sized motors are used to drive a variety of different machinery, such as fans, compressors a. The altitude does not exceed l000m; b. The maximum ambient air temperature does not exceed 40 �° C; the minimum ambient air temperature is -15 �° C; c. The average monthly maximum relative humidity of the wettest month is 90% and the average minimum monthly temperature of the month is not higher than 25 �° C; d. Power frequency is 50Hz �± l%; e. The working voltage change range is not more than �± 5% of the rated voltage; f. The motor rating is continuous duty S1. Specifications: a. Motor model: (JS158-4) b. Rated frequency: (50Hz/60HZ) c. Rated power: (10KW-680kW-5000KW-100MW) d. Rated voltage: (460-6KV-10KV-20KV) e. Number of poles: (2-4-18 poles) f. Outlet box position (right side of the motor [looking at the end of the motor shaft extension]