KNQ series distributed DC power supply system
Application fields
The KNQ series distributed DC power supply system is mainly used for power supply in the automatic control systems of ring main units and box-type substations. It is applicable to fields and users in power, transportation, power plants, communications, chemical industry, metallurgy, medical care, factories and mines, construction, and fire protection, and can be used as the operating power and control power for high-voltage switches, relay protection, and automatic devices.
System Features
1. Low space occupancy, saving floor space, convenient installation and wiring, and lower cost;
2. Integrated design of rectification, monitoring, power distribution, and battery;
3. LCD display in Chinese, clearly showing the power supply working status and parameters;
4. Software calibration technology
The power module adopts software calibration technology. There are no potentiometers inside the module. Through buttons and LCD display, the output voltage, output current limiting, voltage measurement, current measurement, etc. can be calibrated, and the parameter adjustment is convenient and fast;
5. CPU automatic control, easy to use, and complete alarm function.
| Project Name | Technical parameters |
| Rated input voltage | 220VAC±20% |
| Power grid frequency | 50Hz±10% |
| Power factor | ≥0.95%(full-load output) |
| Power supply capacity | > 150VA |
| Rated output voltage | 220VDC, 110VDC, 48VDC, 24VDC |
| Continuous power | ≤200W |
| Voltage stabilization accuracy | ≤±0.5% |
| Steady current accuracy | ≤±0.5% |
| Ripple coefficient | ≤±0.1% |
| Short-term power | 300W/20s (powered by battery) |
| Instantaneous power | 600W/1s – 1000W/1s (provided by battery) |
| Battery backup | Ensure operation for more than 8 hours after AC power outage and provide more than 20 switch operations |
| Protection function | Output overvoltage protection, short-circuit protection, etc |
| Audible noise | ≤50dB |
| Module size | 235mm (H) *143mm (W) *129mm (D) |
| Opening size | 187mm (H) *139mm (W) |
| Cooling method | Intelligent temperature-controlled air cooling |
| Working mode | Continuous long-term operation |
| Insulation strength | No flashover or breakdown within one minute at a voltage of over 10MΩ and 2kVAC |
| Battery capacity | 7Ah, 10Ah, 12Ah, 20Ah, 24Ah, 38Ah |
Operating environment
1. Environmental temperature: -10℃ to +50℃;
2. Relative humidity: ≤ 95% (20±5℃);
3. Altitude: ≤ 3000m;
4. Dust: ≤ 5mg/m3;
5. Earthquake intensity: no more than 8 degrees;
6. Microcontroller noise resistance: 1000V 1μs pulse for 1 minute;
7. The equipment should operate indoors and have good ventilation;
8. There should be no corrosive gases that damage metals or insulations indoors;
9. There should be no strong electromagnetic field interference or severe vibrations.