Products Description
ABB SAFT127 CHC Chopper Control Card
The ABB SAFT127 CHC is a chopper control card designed to manage braking energy and regulate power flow within ABB drive and inverter systems. When a drive's intermediate DC link voltage rises above a limit during regenerative conditions (such as motor deceleration), the chopper control board activates a chopper circuit to dissipate the excess energy, protecting the drive and associated equipment.
This board plays a crucial role in maintaining stable DC link voltage, improving system performance during dynamic speed changes, and enabling safe energy dissipation in industrial applications.
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32D Guomao Building, Siming District, Xiamen, Fujian, China
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+86-18020714492
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Functional Role / System Position
In a power conversion or drive assembly, the SAFT127 CHC board is part of the brake energy management loop:
DC Intermediate Circuit → SAFT127 CHC Chopper Control Card → Brake Resistor / Dump Load
It continuously monitors DC link conditions, triggers the chopper switch when voltage thresholds are exceeded, and thereby directs surplus energy into a resistor or dump load. In doing so, it supports reliable braking behavior and reduces mechanical stress on the drive train.
Key Features / Functional Capabilities
◆ Controls braking chopper circuits to manage regenerative energy
◆ Monitors DC link voltage in real time
◆ Activates chopper switching when preset thresholds are reached
◆ Reduces voltage overshoot during deceleration events
◆ Improves dynamic performance of drives with high inertia loads
◆ Designed for modular installation in drive control assemblies
◆ Industrial construction for sustained operating conditions
Application Areas / Typical Use Cases
◆ Brake energy management in AC/DC drive systems
◆ High‑inertia motion applications requiring controlled deceleration
◆ Industrial conveyor and hoist systems
◆ Automated machinery with frequent speed changes
◆ Retrofit or replacement in legacy and modern ABB drive cabinets
Product Identification
| Specification Item | Confirmed Detail |
|---|---|
| Product Type | Chopper Control Card |
| Manufacturer | ABB |
| Model | SAFT127 CHC |
| Function | Regenerative energy dissipation control |
| System Role | Brake chopper activation and DC link regulation |
| Integration | Drive and power conversion assemblies |
| Mounting | Internal chassis or control cabinet slot |
| Environment | Industrial indoor use |
| Warranty | One‑year warranty |
Installation / Handling
The SAFT127 CHC card must be installed within a compatible ABB drive or control rack following system wiring and mounting guidelines. Ensure secure seating in the intended slot and robust connections to the DC link sensing circuits and brake chopper trigger lines. Standard electrostatic discharge (ESD) precautions should be followed during handling and servicing to protect sensitive electronics.
Advantages / Value Highlights
◆ Enables controlled dissipation of regenerative energy in advanced drive systems
◆ Helps maintain DC link voltage within safe operating range
◆ Improves drive performance during dynamic speed transitions
◆ Reduces wear and tear by limiting voltage excursions
◆ Compatible with modular automation and drive architectures
Supply & Warranty Information
The ABB SAFT127 CHC Chopper Control Card is supplied as a complete industrial control board.
Warranty coverage: One‑year warranty.
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Common problems
Q1: What is the main purpose of the SAFT127 CHC card?
It manages the activation of braking chopper circuits to dissipate surplus energy when the DC intermediate circuit voltage rises beyond safe limits.
Q2: Where is this chopper control card typically installed?
It is installed inside a compatible drive control cabinet or power conversion chassis.
Q3: Does the SAFT127 CHC actively regulate output to motors?
No. It specifically monitors DC link voltage and activates the brake chopper; primary motor control is handled elsewhere in the drive.
Q4: Can this card be used in any ABB drive system?
Compatibility must be verified against the specific drive model and system architecture.
Q5: Is specialized maintenance required for the chopper control card?
Routine inspection and clean electrical connections are recommended; ESD precautions should be observed during handling.
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