SGB ??high-voltage reactive power automatic compensation device 
 1, an overview 
 Frequency AC power system pressure without automatic compensation device connected in parallel to 10kV work to achieve real-time auto-complete a capacitor switching network reactive power and voltage control to improve power factor, reduce line losses, improve the quality of power supply. 
 SGB ??type for 10kV lines, mainly by the exchange of vacuum contactors, fully sealed high voltage shunt capacitors, high voltage controller, wireless current transformer (or outdoor column current transformer), voltage transformers, surge arresters, connected bus and other components. The current signal measured by the outdoor column of current transformers or wireless current transformers, voltage transformers V-shaped pick prior to the vacuum switch, used to measure the bus voltage, voltage, current, calculate the reactive power. Wireless sending and receiving a current signal or outdoor current CT to high-pressure reactive controller as the current sampling. 
 Automatically switching principle: measuring the bus voltage and current of the power supply side, the computing network reactive power Q1, compared to the reactive power with capacitors to set the threshold for automatic switching, when Q1 is greater than the input gate limit Qt, after setting extension , the device is put into operation; when Q1 is greater than the removal of the threshold Qq (capacitor input capacity of the compensation, then the power factor should be negative) after setting the delay, the device out of operation. 
 Qt, Qq settings based on actual operating parameters of the bus, appropriate changes in order to obtain the best value for money, and ensure that the device does not occur switching shock. 
 Installed within the device capacitor discharge resistor. 
 2, conditions of use 
 Altitude: ≤ 1500m 
 Category of ambient temperature: -40 / -25 / 45 ° C (indoor) 60 ° C (outdoor) 
 Relative Humidity: 40 ° C (45 ° C), 20% to 90% 
 The installation site should be free of harmful gases and steam, and non-conductive dust. 
 The installation site should be no severe vibration and shock. 
 3, the main parameters 
 · Rated voltage of 10kV and 6kV. 
 · Column reactive power compensation device rated capacity (kvar): 100,200,300,360,450,600,900,1200. 
 Control cabinet working voltage: 220V ± 20%. 
 Control mode: voltage, reactive power, period. 
 Measurement accuracy: the voltage error ≤ 0.5%, the current error ≤ 1%, reactive power, active error ≤ 1% power factor of ± 2%. 
 With overcurrent, overvoltage, undervoltage, phase loss protection function, the compensation device is disconnected from the grid automatically by the internal discharge components of the residual voltage reduced to below 50V. 
 · Devices using vertical box-type structure, the cabinet can use high-quality steel or stainless steel plate, it can be installed in the installation of higher than three meters of the two vertical cement rod rack, protection class IP3L3.