Widely used in AC 50HZ, rated voltage 400V, 1250KVA power transformer in distribution system, the perceptual load of wattless power compensation. To improve the power factor of the circuit, and improve the power quality, prolong the service life of electric power equipment. Contactor for does not require the compensation too fast occasions; thyristor type due to the zero voltage trigger technology, no impact on the system and capacitance, so can be suitable for frequent fast compensation. Thyristor 8421 control mode, more suitable for the compensation series, large capacity system, so more economic.
The device can also be used for harmonic serious, generally adopts two schemes. One is non tuning scheme: capacitor compensation branch series a certain proportion of reactor, prevent capacitor and a resonant system, this scheme is applicable to only need no power compensation without filter. Another is the compensation and filtering scheme, the need for on-site measurements of the system, design the best solution using the filtering software and simulation system, the harmonic ratio requirements of the power supply system at the same time, the best price performance. Generally if the distributor monotone co filter circuit.
Technical characteristics
Strong anti-interference capability, through the IEC255-22 harsh grade III immunity test
In the condition of strong harmonic content, accurate calculation of current, voltage, fundamental wattless, active power and power factor
By high performance microprocessor, high integration, low cost, high reliability
Bypass capacitor, improve the service life of the capacitor
The 8421 switching characteristics: in the 4 way control, completion of 15 switching up. To improve the control precision.
Only three buttons, with display, convenient operation, intuitive.
The system harmonic content seriously, with one step for precise control of cut in place, avoid single input is prone to over load phenomenon.
Operating instructions
Controller automatically (auto lights) and manual (automatic lights) two kinds of state, through the function key settings. After power is the first automatic state. The automatic operation, the controller according to the detected no power automatic switching capacitor; manual state, by pressing a button switch capacitors.
The controller has a fixed display power factor and cycle display active (P), no power (q), power factor (C), voltage (U), current (E) in two ways.
According to the "functional" button, display has been voted the way; then press the "function" button, the code displays "Q", the displayed value displays the minimum capacitance, through "▲" "▼" button to increase, reducing adjustment; press "function" button, the code displays "O", the displayed value display overvoltage a fixed value, through the "▲" "▼" button to adjust; then press the "function" button, the code displays "L", the displayed value display under voltage setting value, through the "▲" "▼" button to adjust; then press the "function" button, the code displays "S", the display value display the delay setting value (unit: seconds), through the "▲" "▼" button to adjust; then press the "function" button, the code displays "P", shows the value "1" indicates a fixed power factor, shows the value "2" indicates the cycle, through "▲" "▼" button to adjust; then press the "function" button, the code displays "H", the displayed value display current transformer ratio setting value, for example, "15" represents the current transformer ratio is 1500:5, through the "▲" "▼" key to adjust. Then press the "function" button, the code displays E, display value display switching channels, through the "▲" "▼" key to adjust;
Note: the controller factory before the parameters have been set, please do not arbitrarily adjust.
Technical parameters
Rated voltage: 380V
Rated current: 5A
Measurement of power: 0~999Kvar
The control sensitivity: 100mA
Compensation of wattless power
Overvoltage preset: 400~420V (differential 6V)
Undervoltage preset: 300~380V
Delay time: 0S~99S differential 1S
Single level capacity preset: 0~100Kvar
Ratio of current transformer: 100/5~3000/5A set
Hole size: 113mm x 113m
Ordering instructions
Controller (control contactor and thyristor)
Control the number of capacitor
The minimum capacitance differential
Line current transformer ratio
Note: General for Capacity Circulating switching mode, such as the requirements of the 8421 switching or other way, please special statement.
The controller application and wiring diagram in figure.
