KEMSO brand water pumps are widely used in both industrial and civil fields. The voltage requirement is one of the core parameters for the performance and application reliability of the entire product. The mainstream models usually support the standard configuration of AC voltage ranging from 220V to 240V and frequency of 50Hz, covering most parts of Asia, Europe and some countries in Africa. We also offer models ranging from 110V to 120V with a frequency of 60Hz, suitable for markets such as North America and Japan. For industrial-grade high-power applications, a three-phase voltage of 380V (±5% allowable range) and 50Hz are common configurations, ensuring a stable input of 380V±15V during continuous operation of systems such as HVAC circulation pumps. Voltage deviation exceeding the rated value by ±10% (for example, for a 220V model, the voltage is lower than 198V or higher than 242V) may cause the motor winding temperature to rise by more than 60°C, significantly shortening the expected 50,000-hour design life by approximately 30%, and the energy efficiency grade may drop from IE3 to IE2, with power consumption increasing by about 7%.
In the field related to petroleum energy, the voltage compatibility of KEMSO pumps is particularly crucial. When it comes to Fuel Pump applications, such as submersible pumps in underground storage tanks of gas stations (with a flow rate range of 45-130 liters per minute), the voltage specifications of ATEX/IECEx explosion-proof certification must be strictly followed. The standard model requires a rated three-phase AC power of 230V or 460V, with a fluctuation range not exceeding ±5%, ensuring continuous safe operation for more than 8,000 hours in hazardous areas (such as Zone 0/1) with a maintenance-free cycle. Data from the California Environmental Protection Agency in 2018 showed that a chain of gas stations had their submersible pump motors burned out due to voltage fluctuations exceeding the standard by 12%. The cost of a single shutdown for repair exceeded 20,000 US dollars, and the cost of dealing with fuel leakage pollution reached 150,000 US dollars, highlighting the economic and environmental risks of voltage stability.
For large-scale water supply and fire protection systems, KEMSO high-pressure multistage centrifugal pumps (such as the CDL series) need to have their voltages customized based on power. A CDL32-120 type water pump with a rated power of 30kW has a rated current of approximately 56A when the input voltage is 400V three-phase electricity, and the peak starting current can reach 300A (lasting for 0.5 seconds). The 2023 report of the China Urban Water Supply Association indicates that the equipment failure rate of pumping stations equipped with ±5% pressure stabilizing accuracy UPS is 65% lower than that of conventional grid direct supply. In a specific case, a water plant in Shenzhen adopted 10 CDL100-200 type water pumps (each unit with a power of 90kW and a voltage of 6kV), and in combination with the transformer winding ratio adjustment for ±3% voltage fluctuation, the efficiency of the pump sets was always maintained above 82%, saving more than 500,000 yuan in electricity fees annually.
Voltage adaptability in extreme environments is the technical advantage of KEMSO products. The booster pump for oil pipelines in tropical regions needs to withstand an ambient temperature range of -15°C to +55°C, and the allowable voltage range is extended to -15%/+10% of the nominal value (for example, the nominal 230V is actually effective at 195-253V). The measured data of a palm oil factory in Indonesia in 2021 shows that its process cooling pump has been operating continuously for 4,000 hours without attenuation under conditions of 98% humidity and ±8% voltage fluctuation. For Marine seawater desalination high-pressure pumps, they must be certified by DNV, the Norwegian Classification Society. When the input voltage is 1100V, the transient overvoltage should not exceed 1200V (duration ≤20ms), and at the same time, the impeller speed should maintain a constant accuracy of 3500rpm±1% under 60Hz voltage, ensuring that the reverse osmosis membrane life is maintained at the designed value for more than 5 years.