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Tran Propulsions Control Systems
Tran Propulsions Control Systems
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COVO52-A0-type Converter/Inverter 
- Quality assured by KNR (2002)
- Main Circuit Method: Single-phased voltage-type PWM
converter, Three-phased voltage-type PWM inverter
- Main Circuit Element: IGBT 3300V 1200A
- Input Power: 840V AC x 2/1500V DC
- Controlling Capacity: 200KW x 4
- Cooling Method: Natural cooling by heat pipes

SVF35-A0-type VVVF Inverter 
- Applied Lines: Subway No. 7 and 8 Lines of SMG
- Main Circuit Method: 2 level 3-phased voltage-type PWM inverter
- Main Circuit Element: IGBT 3300V 1200A
- Input Power: 1500V DC
- Controlling Capacity: 210KW x 4-
Cooling Method: Natural cooling by heat pipes

Main Converters 
- Applied Vehicles: Resistant Car of KNR Line No. 1
- Type: MMC WTB-20R
- Method: CAM contactor type controlled by the CAM shaft that
is operated by the control motor - Control Capacity: 150㎾ (375V, 440A) × 8



Auxiliary Control Box 
Item Rating
Fuse  DR15S1 DC 1500V - 300A,
 CC1900C1RB DC 1900V - 1000A
Rectification
Element
 500HXD25 or 500HXD28 5000V - 1000A
 Sunbber circuit for the rectification element : 4 circuits
DC Relay  R, B-11
AC Relay  RAX-L440D 24V DC
Line Breaker 
Item Rating
Main Circuit Voltage (V)  DC 1500
Main Circuit Current (A)  DC 600A(HB1,2), DC 800A(CCK1,2)
Control Circuit Voltage (V)  DC 100
Controlling Air Pressure
(㎏/㎠)
 5.0
Method  High-speed breaker + Unit switch
KNR AC/DC Selector 
- Applied Trains: Electric trains in Seoul metropolitan area
- Frequency: 60Hz
- Rated Voltage: AC 25KV / DC 1500V
- Method: Controlling by compressed air




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