Advanced Chopper Control for DC Drive Systems
This chopper control board manages the DC link voltage for ABB drive systems. The SAFT 125 CHC SAFT125CHC handles high-speed switching of power transistors in chopper circuits. It continuously monitors the DC bus voltage and adjusts the duty cycle accordingly. Moreover, the board features overvoltage and undervoltage protection for reliable system operation. Its modular design integrates easily into existing Thyropac and DCS 500 drive systems.
Technical Specifications and Physical Attributes
The SAFT125CHC operates on a 24 V DC control supply for all internal logic. It accepts analog feedback signals of 0–10 V DC from voltage sensors. The board also provides a pulse output of 15 V at 200 mA for gate drives. It measures approximately 280 mm in height and 150 mm in depth. The unit weighs about 0.5 kg, making it suitable for subrack mounting. Furthermore, the SAFT125CHC supports a switching frequency up to 2 kHz for precise control. Its operating temperature ranges from -20 °C to +55 °C.
| Parameter | Specification |
|---|---|
| Manufacturer | ABB |
| Product Type | Chopper Control Board |
| Part Number | SAFT125CHC (SAFT 125 CHC) |
| Compatibility | Thyropac, DCS 500, DC drives |
| Control Supply | 24 V DC |
| Analog Inputs | 0–10 V DC |
| Pulse Output | 15 V at 200 mA |
| Switching Frequency | ≤ 2 kHz |
| Dimensions (H x D) | Approx. 280 mm x 150 mm |
| Weight | Approx. 0.5 kg (1.1 lb) |
| Operating Temp. | -20 °C to +55 °C |
| Mounting | Subrack |
Integration and Application Guidance
This board regulates the DC link voltage in regenerative and dynamic braking systems. First, mount the SAFT125CHC securely into the designated subrack slot. Then, connect the DC bus voltage sensor to the analog input terminals. For the output, wire the gate drive signals to the power transistors accordingly. Always use shielded cables for the analog feedback to minimize noise pickup. The SAFT125CHC excels in elevator, crane, and winder applications requiring smooth deceleration. Its proven reliability makes it a trusted choice for demanding drive systems worldwide.
Details
| Weight | 0.5 kg |
|---|---|
| Dimensions | 280 × 150 × 21 mm |
