Product Description
High power factor digital voltage regulator includes single-phase voltage regulator and three-phase voltage regulator, as an AC voltage regulator, it adopts an integrated design combining two or more sets of digital power controllers and a load-matching transformer with two or more sets of output voltage grading taps and it realizes the waveform superimposition and continuous regulation of output voltage by the way of alternative phase shift & voltage regulation at the voltage grading taps of the primary side of the load-matching transformer. It has open-loop or various closed-loop control forms and multiple given control signal selections.
The power factor and current harmonics of traditional SCR voltage regulators vary with the changes of the SCR's conducting angle, the output voltage waveform is waveform with unfilled corners, the power factor is low and the current harmonics are big. After the waveform superimposition technique is adopted on two or more sets of output voltages, a full non-sinusoidal waveform of output voltage magnitude can be realized, according to the power demand curve of the actual load, it can not only meet the high power demand during rapid temperature rise but also can meet the low power demand at constant temperature, thus, with rational grading of matched-load voltage, it improves the power factor and lowers the current harmonics effectively and it can be widely used in the continuous regulation and control of single-phase or three-phase AC power of automatic temperature control systems such as various industrial heating and heat treatment system etc.
The schematic output voltage waveform diagram of the high power factor single-phase voltage regulator is shown as follows:
Product Feature
1. It adopts cabinet-type integrated design.
2. Constant voltage, constant current and constant power closed-loop control and open-loop control functions can be set freely.
3. With high-precision AD conversion, the constant voltage, constant current and constant power precision is higher than 0.5percent and the system resolution ratio is higher than 0.1percent.
4. It is equipped with a LED numeral display tube, which is convenient for setting various functional parameters and displaying electrical parameters.
5. It has an automatic current-limiting function, when the output current is equal to or greater than 1.1 times of the rated current, the current will be limited.
6. It has phase-deficient, overcurrent, overheating, SCR fault, load disconnection or unbalance protection functions.
7. Fault self-diagnosis function.
8. Automatic phase-sequence confirmation function.
9. It has soft start and soft turn-off functions.
10. With RS485 communication interface and MODEBUS communication protocol, it can communicate with PLC and the host computer, which is convenient for remote monitoring.
Product Specification / Models
Technical Parameters
Input
Input voltage
3(1)u00d7220Vu00b115%; 3(1)u00d7AC380Vu00b115% and 50/60Hz; Others
Control power supply
AC220V, 50/60Hz
Output
Output voltage
0~98% of input voltage
Output current
AC20A~10000A
Applicable load
Resistive load, inductive load and primary-side of transformer etc.
Main Control Characteristics
Given signal
20mA, 0~20mA and 0~10mA
Digital communication given signal selection
Setting range of given slope
20%~100%
Soft start and soft turn-off
0~100s
Control mode
Integrated control of open-loop, constant voltage, constant current, constant power, power regulation, phase shift / power regulation
Working mode
Continuous type
Protection
Overcurrent protection
When the input current is equal to or greater than 1.5 times of the rated current, it cuts off the output within 10ms
Overheat protection
When the temperature of the radiator (temperature of the power device) is equal to or greater than 80dges, it cuts off the output within 10ms
SCR fault
In case of SCR faults, the SCR driving signal will be cut off
Phase-deficient protection (applicable to three phases)
In case of power grid phase-deficient, it cuts off the output
Load disconnection protection
When the set value is exceeded in case of load disconnection or parts of load disconnection, it cuts off the output within 10ms
Environment
Temperature of application environment
-5~+40dges
Storage temperature
-5dges~+60dges
Relative humidity
Passive contact capacity<=90ppercentRH and without moisture condensation
Installation
Installation mode
Indoor cabinet-type installation