Three-phase imbalances are common in low voltage distribution networks. Due to the existence of a large number of singlephase loads in urban and rural networks, the current imbalance between the three phases is particularly serious.
The current imbalance in the power grid will increase the loss of the line and transformer, reduce the output of the transformer, affect the operation safety of the transformer, and cause zero drift, resulting in three-phase voltage imbalance, and reduce the quality of power supply. In view of the above situation, our company have developed three-phase unbalanced automatic regulation device for the purpose of optimizing power quality and realizing energy conservation and emission reduction.
The device filters over 90% of the zero sequence current and controls the three-phase imbalance within 10% of the rated capacity.
|2||Product type||three phase imbalanced regulation|
|5||Wiring Type||4L: 3P4W 3L: 3P3W|
|7||Door opening mode||No marked: the default is front door opening, wall mounted installation; Side door opening, plug-in three-phase four wire installation must be specified|
|Normal working and installation conditions|
|Ambient temperature||-10℃ ~ +40℃|
|Relative humidity||5％～ 95％，no condensation|
|Altitude||≤ 1500m，1500~3000m (derating 1% per 100m) according to GB / T3859.2|
|Environmental conditions||no harmful gas and steam, no conductive or explosive dust, no severe mechanical vibration|
|Outdoor installation||At least 15cm space should be reserved for the upper and lower air outlets of the module, and at least 60cm
space should be reserved for the front and rear of the cabinet for easy maintenance.
|Relative humidity||Relative humidity:When the temperature is + 25 ℃ , the relative humidity can reach 100% in a short time|
|Rated input line voltage||380V (-20% ~ +20%)|
|Rated frequency||50Hz ( 45Hz ～ 55Hz)|
|Power grid structure||3P3W/3P4W (400V)|
|Current transformer||100/5 ～ 5,000/5|
|Overall eifficiency||≥ 97%|
|Three-phase balance compensation capability||Imbalance ＜ 3%|
|Target power factor||1, Response time ＜ 10ms|
|Reactive power compensation rate||＞ 99%|
|Protective function||Over-voltage protection, under-voltage protection, short-circuit protection, over-current protection, over
temperature protection, drive fault protection，lightning protection
|Power distribution function||With C-level lightning protection function|
|Communication monitoring capability|
|Display content||Real-time operating information such as voltage, current, power factor, and operating temperature|
|Communication interface||Standard RS485 interface, optional wifi or GPRS, (only one communication mode can be selected for the same device)|
|Communication protocol||Modbus protocol|
|Mounting type||F or H pole, installation inclination < 5 ℃|
|IP grade||IP grade|
|Dimension and structure||capacity
|front door opening||side door opening||weight