Selection of emergency generators
Emergency generators are generally recommended to be high-speed, supercharged, fuel-efficient, and of similar capacity. High-speed supercharged diesel engines have larger individual capacity and occupy less space; diesel engines should be equipped with electronic or hydraulic governors for better speed regulation; generators should be selected with brushless excitation or phase-shifting excitation units for synchronous motors, ensuring greater reliability, lower failure rates, and easier maintenance; when the capacity of a single air conditioner or motor in the primary load is large, a generator set with three times harmonic excitation should be chosen; the set should be mounted on a common chassis with shock absorbers; the exhaust pipe outlet should be equipped with a muffler to reduce the noise impact on the surrounding environment.
(1) Capacity Determination: Emergency generators are typically used as backups and are often in standby emergency start-up mode. They do not run continuously for long periods, usually not exceeding 8 hours. Therefore, capacity can be determined based on the "standby power." Consider the sum of the capacities of the primary loads (excluding standby capacity), taking into account the corrected generator capacity, and ensuring it can meet the start-up requirements of one motor in the primary load. Based on this, the capacity of the emergency diesel generator set can be determined. Emergency generators generally use three-phase AC synchronous generators with a rated output voltage of 400V.
(2) Quantity Determination: Generally, a power generation set is selected with 1 unit of automation, 1000-1500 rpm, brushless excitation, 400/230V, three-phase four-wire with control panel, charging/discharging equipment, and a shared base. It is possible to request a shared base with a daily oil tank to reduce pipeline and area occupation. Additionally, for reliability considerations, two sets of generators can be paralleled for power supply. The number of emergency power generation sets supplied should generally not exceed 3. When multiple sets are selected, the sets should be as similar as possible in model and capacity, with similar voltage regulation and speed control characteristics, and the fuel type should be consistent for ease of maintenance and shared spare parts. We commit to satisfying our customers with advanced technology equipment, comprehensive service, and zero field failures. To express our gratitude to our customers, we provide top-quality equipment and send skilled technical operators to operate the equipment. Our equipment includes imported or domestically produced original equipment from various brands such as Cummins, Windman, Caterpillar, Doosan, Weichai, and Shangchai, among others.
