December 31, 2020
1. Normative references:
GB/T 2819-------Mobile electric power plant,general specification for.
GB/T 29328-----Specific configuration of power supply and self-emergency power supply for important power users.
GB/T 4712-------Requirements of classification for automatic diesel generating set.
GB/T 12786-----General specification for automatic electric power plant with internal combustion engines.
GB/T 2820.1----Reciprocating internal combustion engine driven alternating current generating sets-Part 1: Application, ratings and performance.
ISO 8528-1------Reciprocating internal combustion engine driven alternating current generating sets-Part 1: Application, ratings and performance, IDT.
GB/T 755--------Rotating electrical machines-Rating and performance.
IEC 60034-1----Rotating electrical machines-Part 1: Rating and performance. IDT.
2. Terms and definitions
A. Rated output power
It is available for an unlimited number of annual hours in variable load application, in accordance with GB/T2820-97 (eqv ISO8528); a 10% overload capability is avaiable for a period of 1 hour with a 12-hours period of operation.
B Continuous working power
It refers to the non-stop power generation of the generator, generally refers to the continuous power generation for more than 12 hours. The longer the generator set runs, the more power will drop.
C. Standby power
The standby output is applicable for supplying emergency power for duration of a utility power interruption. No overlad, utility parallel or negotiated outage operation capability is available at this rating.
3. Working conditions
A. Power supply object of generator set:
Silent diesel generator set is used as an emergency backup power source. When the mains power is cut off, it is mainly used for automatic warehouse production. The automatic warehouse has an installed capacity of 450kW and an operating load of about 200kW. Cummins generator is also used as a fire-fighting backup power source for fire-fighting water pumps and fire-resistant rolling doors, with an operating load of 130kW.
B. The connection scheme of the generator set and the power distribution system of the plant area:
The generator is installed outside the power distribution room of the plant and is connected to the power distribution system of the plant through the control panel. The connecting cable adopts YJV22 0.6/1kV 3×120+2×70. For details, please refer to "Generator Wiring System Diagram"
C. Installation location and method of generator set:
For details, please refer to "Generator Installation Plan"
D. Diesel generator set local working natural environmental conditions: the following table:
| No. | index | Data |
| 1 | Average annual temperature | 19.4℃ |
| 2 | Extreme maximum temperature | 41.2℃ |
| 3 | Extreme minimum temperature | -6.0℃ |
| 4 | Average maximum temperature in the hottest month | 34.6℃ |
| 5 | Average minimum temperature of the coldest month | -4.7℃ |
| 6 | Summer air conditioning outdoor calculation of wet bulb temperature | 27.1℃ |
| 7 | Annual average air pressure | 100.01kPa |
| 8 | Average summer pressure | 99.09kPa |
| 9 | Average winter pressure | 100.84kPa |
| 10 | The average outdoor relative humidity of the hottest month | 70% |
| 11 | Calculate the relative humidity outside the air conditioning in winter | 75% |
| 12 | Average annual total precipitation | 1434.3mm |
| 13 | Annual average outdoor wind speed | 2.0m/s |
| 14 | Average outdoor wind speed in summer | 2.0m/s |
| 15 | Average outdoor wind speed in winter | 2.1m/s |
| 16 | Most wind direction and frequency throughout the year | N 25% |
| 17 | Maximum snow depth | 13cm |
| 18 | Annual average sunshine hours | 1866.6h |
| 19 | Annual average number of thunderstorm days | 67.4d |
| 20 | Seismic intensity | Level 6 |
