Technical parameters of thyristor intermediate frequency power supply cabinet

1. The main technical parameters of KGPS-500/0.5 intermediate frequency power supply are as follows:

2. BSC8M-2 main control board : the core components adopt American ASIC2 high-density integrated circuit block, with phase sequence adaptive circuit, inverter adopts sweep frequency zero voltage start mode, frequency tracking circuit adopts average sampling scheme, inverter circuit There is an inverter angle adjustment circuit in the addition, which can automatically adjust the matching of the load impedance. It has the function of overload starting and material shortage protection.

3. Function and protection: The core digital circuit of the main control board has 31 input/output interfaces. The internal functions include rectifier phase shift trigger, phase sequence adaptive, inverter trigger, inverter lead angle lock, inverter repeated start and main Control panel undervoltage automatic protection and other functions.

◇ Main circuit short circuit protection

◇ Main circuit lack phase protection

◇ High and low grid voltage protection

◇ Cooling water low pressure protection

◇ High cooling water temperature protection

◇ SCR over-voltage and over-current protection

◇ Load overvoltage and overcurrent limit

4. Filtering reactor: The silicon steel sheet selected for the reactor is the Z10 cold-rolled high permeability silicon steel sheet produced by Wuhan Iron and Steel. The copper tube is wound with T2 oxygen-free copper tube produced by Luoyang Copper Material Factory. Double winding wire package, wrapped with mica tape, H-class insulation, working noise is less than 70 decibels;

5. Universal circuit breaker: The circuit breaker of the front switch cabinet of the intermediate frequency power supply selects the DW-17 model;

6. Operation panel: There are meters on the panel such as DC voltage, DC current, intermediate frequency voltage, intermediate frequency power, intermediate frequency frequency, etc. Equipped with AC opening/closing, intermediate frequency start/stop, fault reset buttons, over-current, over-voltage indicator lights, internal/external control switch and power adjustment potentiometer. The power output of the inverter can be adjusted arbitrarily within the range of 10% to 100%.

7. The cooling water protection system of the inverter: the intermediate frequency power cabinet adopts closed cooling water, and the thyristor and reactor are equipped with water temperature protection. When the water temperature exceeds the rated value, the inverter will automatically shut down; all inlet and outlet water pipes are made of stainless steel.

8. The external structure of the inverter: the external structure is a standard GGD cabinet, three-door cabinet, the overall dimensions (length × width × height): 2400 × 900 × 2000mm, the cabinet shell is sprayed and the color is light green .