1 , the unit capacity and number of units determined in accordance with the emergency should be integrated into the load size and sequence and the single largest motor starting capacity and other factors. When a large load of emergency , can be run in parallel multi-machine , the unit number of units should be 2 to 4 units. When the subject tied to conditions, can be implemented zoning power . When large electricity load harmonics should consider its impact on the generator.
2, in the program , and the preliminary design stage , the diesel generator capacity can be 10% to 20% of the total capacity of distribution transformers estimate . In the construction design stage , according to a load , fire load, and some important secondary load capacity , maximum capacity is calculated according to the following methods to determine : 1) stable load calculation generator capacity ; 2 ) by the largest single motor starting motor or group needs to calculate generator capacity ; 3 ) press to start the motor , the generator bus voltage drop calculation allows the generator capacity.
3, when the elevator load, the maximum capacity of the full voltage start- cage motor , the generator bus voltage should not fall below 80% of rated voltage ; When no elevator load bus voltage should not fall below its rated voltage 75% . When conditions permit , the motor can be buck starts.
4 , when multiple units , you should select models, specifications and features the same unit and ancillary equipment.