1 power of diesel generators
(1) Continuous power (COP) (constant load running)
Cop is maintained under the agreed operating conditions and in accordance with the manufacturer's requirements, the unit is continuously running at a constant load, and the maximum power of unlimited running time per year.
(2) Basic function (PRP) (Variable load continuous operation)
The PRP is maintained under the agreed operating conditions and in accordance with the manufacturer's requirements, and the unit is running continuously with variable loads, and the maximum power of the annual running time is unrestricted.
(3) Time-limited operating power (LTP)
LTP for the agreed operating conditions and in accordance with the manufacturer's requirements for maintenance, the unit annual run time up to 500h maximum power.
(4) Emergency standby power (ESP)
(Variable load limited to run) ESP is maintained under the agreed operating conditions and in accordance with the manufacturer's requirements, in the power outage or under test conditions, the unit operates with variable loads and runs at a maximum of 200h per annum.
The performance grade of the emergency diesel generator in the data center room should not be lower than the G3 level; A Class A data center generator set should be based on the basic rate (PRP) choice; The output power of the B-level data center generator sets can be selected according to the limited operating power (LTP).
2 the necessary conditions for selecting diesel generators
The necessary conditions for selecting diesel generators are as follows:
(1) The ambient temperature, humidity and altitude of the installation site
When the temperature and humidity of the environment and altitude exceed the rated value of the generator, the generator needs to reduce the use;
(2) The total capacity of diesel generator power supply Load
The capacity data of all diesel generators are required, including installed capacity, load coefficient, power factor, etc. The electric motor load also gives the parameters such as number, efficiency, starting current multiples;
(3) Starting order
① in accordance with the importance of load to distinguish the starting order;
② according to the load size and starting current size, the same important motor capacity, starting current high priority.
③ the system allowable voltage drop, commonly used electrical equipment terminals voltage deviation allowable value of table 1.