Auxiliary control boxes are equipped with circuit breakers, AC overcurrent relays, DC voltage relays, high voltage fuses and diode stacks and etc. and control vehicle and protect devices.
Specification
Main circuit voltage: DC 1,500V Main circuit current : DC 1,200A Control voltage: DC100V
[LB BOX]
Line Breaker Box
Function
LB boxes are equipped with high speed breakers, line breakers, charging resister trip units and relays to protect rearward devices from damage caused by overcurrent.
Specification
Main circuit voltage: DC 1,500V Main circuit current: DC 600A Control voltage: DC100V
[Fuse Box]
Fuse Box
Function
Fuse boxes protect rearward devices with installed fuses from damage caused by overcurrent.
Specification
Main circuit voltage: DC 1,500V Main circuit current: DC 1,900A
[Resistor Box]
Resistor Box
Function
Resistors(OVRe) provide overvoltage protection linked with VOT in case of VVVF INVERTER overvoltage and CHRe protects rapid charge of capacitor by restricting current when charging up.
Specification
Main circuit voltage : DC1,500V Overvoltage set value: DC2,000V