Selection of Fire Emergency Silent Diesel Generators

The selection of fire emergency silent diesel generators should be based on the fundamental principle that emergency diesel generators are mainly used in important places. In case of an emergency or power outage due to an accident, there is an instant power cut, and the emergency generator set can quickly restore power. There are two characteristics of the operation of fire emergency silent diesel generators:

One is for emergency use. The starting performance must be good, but the continuous operation time is not long, generally only a few hours (≤ 12h).

The other characteristic is for standby use. The emergency generator set is usually in a standby state. Only when all the main power sources fail and the power is cut off, the generator set will start running and supply power to the emergency electrical load. When the main power source returns to normal, it will be switched off immediately.

Therefore, in view of these two characteristics, the editor of Dingbo Power has also put forward targeted suggestions for the reasonable selection of emergency generator sets.

1.Performance selection of fire emergency silent diesel generators: Emergency generator sets should preferably use high - speed, turbo - charged diesel generator sets with low fuel consumption and the same capacity. High - speed turbo - charged diesel engines have a relatively large single - unit capacity and occupy less space. The diesel engine should be equipped with an electronic speed control device, which has better speed regulation performance. The generator should preferably be a brushless excitation synchronous motor, which is more reliable, has a lower failure rate, and is more convenient for maintenance and repair. A muffler should also be installed at the exhaust pipe outlet to reduce the impact of noise on the surrounding environment.

2.Determination of the number of emergency silent diesel generators: When there are multiple diesel generators for standby, generally only one is set as the emergency unit. From the perspective of reliability, two units can also be selected for parallel power supply. The number of generator sets for emergency use generally should not exceed three. When multiple units are selected, the units should preferably be of the same model and capacity, with similar voltage regulation and speed regulation characteristics, and the same type of fuel should be used for easy maintenance and sharing of spare parts. When there are two generator sets for emergency use, the self - starting device should enable the two units to serve as backups for each other. That is, after the mains power fails and the power is cut off, and after a time - delay confirmation, a self - starting command is issued. If the first unit fails to start self - starting three times in a row, an alarm signal should be issued and the second diesel generator should be automatically started.

3.Determination of the capacity of fire emergency silent diesel generators: The rated capacity of the emergency diesel generator set is the 12 - hour rated capacity after atmospheric correction. Its capacity should be able to meet the total calculated load of emergency electricity and be verified according to the requirement that the generator set capacity can meet the starting of the single - largest capacity motor unit among the first - class loads. Emergency generator sets generally use three - phase AC synchronous generators, and their rated output voltage is 400V.

Dingbo Power was founded in 1974 and is one of the earliest manufacturers of generators and diesel generator sets in China. If you want get more information, please feel free to send email to [email protected] we will pay highly attention on your question.