Products Description
ABB 3BHE021951R0124 KVC758A124 Voltage Sensing Sub Board in stock
ABB 3BHE021951R0124 (KVC758A124) is a dual voltage sensing sub-board for ABB ACS5000 medium voltage water-cooled inverter IPS power unit. It integrates DC bus voltage sampling, signal isolation and auxiliary power supply circuits inside the power unit.
This board converts high DC voltage into isolated low-voltage feedback signals for main control logic, and provides isolated power for drive pulse circuits. It is a critical spare component for maintenance and overhaul of ACS5000 high-power variable frequency drives.
Main Specifications
| No. | Item | Parameter |
|---|---|---|
| 1 | Brand | ABB |
| 2 | Model | 3BHE021951R0124, Alias: KVC758A124 |
| 3 | Module Type | Voltage Sensing & Isolated Power Sub Board |
| 4 | System Platform | ACS5000 Water-Cooled Medium Voltage Inverter IPS Power Unit |
| 5 | Input Power | 24V DC ±20% |
| 6 | Isolation Rating | 2.5kV optical isolation |
| 7 | Output Power | Dual ±15V and +5V isolated auxiliary power |
| 8 | Status | Obsolete, only available as spare parts |
Core Functions
| No. | Function Description |
|---|---|
| 1 | Sample and collect DC bus high voltage signal inside IPS power unit of ACS5000 drive |
| 2 | Realize electrical isolation between high voltage DC side and low voltage control circuit by optical isolation |
| 3 | Supply isolated ±15V / +5V auxiliary power for pulse drive and signal conditioning circuits |
| 4 | Send converted voltage feedback signal to main control board for closed-loop regulation and overvoltage protection |
| 5 | Built-in fault interlock function, trigger protection action when abnormal voltage detected |
Application Scenarios
| No. | Application |
|---|---|
| 1 | ABB ACS5000 water-cooled medium voltage variable frequency drive power unit cabinet |
| 2 | Large power medium voltage motor speed control system in mining and metallurgy industry |
| 3 | Oil & gas, cement plant high-power fan and pump variable frequency control |
| 4 | On-site maintenance and spare replacement for existing ACS5000 drive systems |
| 5 | High voltage power unit voltage monitoring and auxiliary power supply subsystem |
FAQ
| No. | Question & Answer |
|---|---|
| 1 | Q:What is 3BHE021951R0124 also named? A:The alias part number is KVC758A124, it is the voltage sensing sub-board inside ACS5000 IPS power unit. |
| 2 | Q:What is the main task of this board? A:It samples DC bus voltage, provides galvanic isolation and supplies isolated auxiliary power for the power unit pulse circuit. |
| 3 | Q:Can this board be used on new projects? A:It is a discontinued legacy component. It is only used as spare replacement for existing ACS5000 medium voltage inverters, not for new projects. |
