Thyristor frequency converter SMK-UB 400/4/0,6 (reconstruction)

Thyristor frequency converter SMK-UB 400/4/0,6 (reconstruction)

Thyristor frequency converter has been reconstructed for the company of CPF Plzeň. Together with three-phase separating transformer and the load of oscillatory circuit it is used for induction heating of rod ends SOT 400/2,1
The aim of the reconstruction was to increase the reliability of its operation and to change the frequency range from original 500 - 1500 Hz to 700 - 2100 Hz. During the reconstruction the current regulator SMK-UB with fifteen units was replaced by a new one containing four basic units with advanced integrated circuits CMOS. Also Programmable Logic Controller was added and water system including the thyristor coolers was changed.

Basic technical specifications SMK-400/2,1/0,6

Nominal input values (power circuits)
Power Input [kVA] 455
Input voltage from separating transformer [V]   3 x 400
Frequency [Hz]  50
Nominal input values (control circuits)
Power Input [kVA]  3
Voltage [V] 3 x 400
Frequency [Hz]  50
Cooling water (external cooling loop)
Consumption [m3/h]   4
Input temperature [°C]  max. 30
Input pressure [MPa] max. 0,4
Pressure loss [MPa]  0,12
Maximum warming thru loop [K] 5
Cooling water (internal cooling loop)
System capacity [l] 25
Nominal output values
Output [kW]  400
Nominal output voltage [V]  600
Frequency [kHz]  0,7 - 2,1
Ostatní parametry
Dimensions (d x š x v) [mm]  1800 x 800 x 2200
Weight [kg]  1800
Cabinet IP 43
Color -

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