Compact Mid-frequency Heater KSO 500/3-A50 of output series 500 kW

Compact Mid-frequency Heater KSO 500/3-A50 of output series 500 kW

The heater is used for induction heating of steel billets with circular cross-section up to forging temperature. The thyristor frequency converter is built in the heater box thus the built-up space is saved and losses in MF cables are eliminated.
Heater is designed for manual placement of the billets including the ability to place more billets at one time into the angled feed chute.
The inductor is connected with inlet and oulet cooling water by means of quick couplers which enables quick exchange for another type. It is not necessary to discharge the cooling water from the inductor into the sewer system and, thereby, the operating costs of the cooling are reduced.
A part of the heater box is an inductor shifter, with two fixed inductors. They are possible to be moved to the working position or the preparatory position. The shift from the preparatory position to the working one does not take more than 3 minutes.
Billets can leave the inductor one of two ways:
1. Gravitationally - this is rather designed for shorter billets. The billets fall into a fixed chute.
2. Roller extractor - must be manually set in place for longer billets just after the inductor exit. This helps guide the billets leaving the inductor in such a manner that that billet exit angle doesn't change until the entire billet is clear of the inductor core.
For both exit systems, it is possible to use a billet separator which functions to separate billets which are occasionally stuck to each other. Furthermore, the heater is equipped with a hot billet sorter, which blocks improperly-heated billets (either underheated or overheated) from being delivered to the press.
The temperature of the heated billet is measured by a contactless thermometer UPF V. The output of the heater and the function of the heated billets separator are regulated according to the temperature value.
The induction heater is controlled by Programmable Logic Controller (PLC) made in Siemens. The operation is done from the control box with buttons and the communication panel. The heating parameters (required temperature, output, temperature limits in etc.) are set up on the communication panel. All failures of the heater are displayed in text on this panel.

Basic Technical Parameters  KSO 500/3-A50

Heated Material magnetic steel
Billet Dimensions Ø D, square (one side) D  [mm] 35 - 80
Length l [mm] 55 - 500
Maximum Process Capacity [kg/h] 1250
Billet Delivery Temperature [°C] max. 1390
Nominal input values (power circuits)
Power Input [kVA] 600
 Input voltage from separating transformer [V] 3 x 525
 Frequency [Hz]  50
Nominal input values (control circuits)  
 Power Input [kVA] 5
 Voltage [V] 3 x 400
 Frequency [Hz]  50
 Nominal output values
 Power [kW]  500
 Frequency [kHz]  1 - 3
 Nominal output voltage [V] 800

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