02-11-1985 Council Packet - Laserfiche WebLink

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15,100.6. MOTOR AND _CABLE: Each pump motor shall he a sealed submersible type either air -filled or� running in high dielectric oil. Motors shall be ,.. NEMA Design B with stator winding and stator leads insulated with moisture resistant Class F insulation or approved oqu al. Motors shall be designed for continuous operation in a totally, partially or non -submerged condition. •+ Motors shall be capable of sustaining a minimum of 10 starts per hour. The pump motor cable, installed, shall he suitable for submersible pump appli- cation with P122-MSHA approval and this shall he indicated by a code or legend r+ permanently embossed on the cable. Cable sizing shall conform to NEC specifi- cations for pump motors and shall be of adequate size to allow motor voltage conversion without replacing cable. Pump cable shall be continuous from pump to the control panel. Junction boxes in the pump chamber are not allowed. The cable entry into the pump motor housing shall be protectea by a minimum of two sealing systems; one the cable entry into the junction chamber and the second sealing the junction chamber from the motor. The cable entry water sgai design shall be such that it p cludes specific torque requirements to insure a watertight and submersible seal. The junction chamber and motor shall be separated by a stator lead scaling gland or terminal board which shall isolate the motor interior from foreign materials gaining access through the pump top. f4 Each unit shall be provided with an adegt.iately designed cooling system. Ther- mal radiators integral to the stator housing, cast in one unit are acceptable for small motors. Units having large motors shall be provided with water jackets alone or in conjunction with thermal radiators and separate circula- �a Lion. Water jacket cooling channels and ports shall he non -clogging by virtue of their dimensions and connections for external flushing shall be provided. `s Each unit shall be capable of continuous operation under full load without damage for extended periods with only the pump volute immersed in the pumped media. Before final acceptance, a field running test demonstrating this abilitv, with 24 hours of continuous operation under the above conditions, !; shall he performed for all pumps being supplied if required ')v the Engineer. to integral thermal sensors shall he provided on all units with a water jacket or 9.4 HP and over to monitor stator temperatures. There %hall he one for each phase group in the motor. These shall he used in conjunction with and a sup- plement to the motor over current protection provided at the c,)ntrol panel.. " All units of 100 HP or more shall he furnished with a moisture sensor and it thermal sensors monitoring hearing temperatures in addition to the motor thermal sensors described above. Moisture and bearing thermal sensore, shall be independent of the motor sensors and shall be used in conjunction with and a supplement to the motor over current protection provided at the control panel. 35,ton-5 �-5R41 c C'Jpvright 198% anne5froo, Ro%ene, AndNrlik t� Asxof ist••y, Inc.