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ABB DKTFM418B 3BHB015651P0001 ACS800 / DCS800 Drive Braking Unit

  • Model: DKTFM418B (3BHB015651P0001)
  • Brand: ABB
  • Series: ABB Industrial Drive Components
  • Core Function: Dissipates regenerative braking energy from DC bus
  • Product Type: Drive Braking Chopper Module
  • Key Specs: 1200 V DC rating | Up to 100 A current | Up to 20 kW dissipation
  • Condition: New Original / New Surplus
  • Inventory Status: Mature drive platform component; buffer stock recommended for plants running ACS800 or DCS800 drive systems.
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Description

3. Key Technical Specifications

Parameter Value
Manufacturer ABB
Model DKTFM418B
ABB Part Number 3BHB015651P0001
Product Type Braking Chopper Module
Compatible Drive Platforms ABB ACS800, DCS800
Maximum DC Bus Voltage 1200 V DC
Continuous Current Rating ~100 A
Energy Dissipation Capacity Up to 20 kW (depending on cooling)
Switching Device High-power IGBT
Isolation Voltage 2500 V AC
Cooling Forced air or liquid-assisted cooling
Operating Temperature −25 to +60 °C
Mounting Chassis-mounted drive module

The DKTFM418B manages regenerative energy in high-power motor drive systems by dissipating excess DC bus voltage during deceleration events.

 

4. Product Introduction & Supply Chain Strategy

The ABB DKTFM418B 3BHB015651P0001 is a braking chopper module used in ABB industrial drive systems such as ACS800 and DCS800. During rapid motor deceleration, regenerative energy flows back into the DC bus. This module activates an IGBT switching circuit that redirects the excess energy to braking resistors, preventing DC bus overvoltage and protecting the drive electronics.

This product is a Brand New Surplus unit. It is not used, not pulled from a decommissioned plant, and not refurbished. Drive braking modules are low-failure but high-impact spares—when they fail, the drive may trip on DC bus overvoltage and halt production. For facilities operating heavy motors (cranes, mills, conveyors), maintaining 1–2 units of buffer stock mitigates downtime risk caused by lead time variability for legacy drive components and improves long-term Total Cost of Ownership (TCO).

87TS01L
DKTFM418B 3BHB015651P0001

 

5. Installation & Configuration Guide

Stage 1 — Pre-Installation (Prep & Safety)

  1. Apply lock-out/tag-out (LOTO) to the drive cabinet.
  2. Verify the DC bus has fully discharged before touching power electronics.
  3. Wear an ESD grounding strap and insulated gloves.
  4. Photograph the wiring layout, particularly DC bus terminals and resistor connections.

Stage 2 — Removal

  1. Disconnect braking resistor leads and control interface cables.
  2. Remove mounting bolts securing the module to the drive chassis.
  3. Pull the module straight out while supporting the heat sink to avoid stressing connectors.

Stage 3 — Installation (Clone & Seat)

  1. Position the new module in the same chassis location.
  2. Reconnect DC bus terminals and braking resistor wiring exactly as documented.
  3. Secure mounting bolts and verify grounding continuity.

Stage 4 — Power-On & Testing

  1. Re-energize the drive cabinet.
  2. Monitor the drive diagnostics for DC bus voltage stability.
  3. Perform a controlled deceleration test to confirm the braking circuit activates correctly.
  4. Verify no overvoltage or thermal alarms appear during braking cycles.

 

6. Firmware/Software Versions & Upgrade Notes

  • The DKTFM418B is primarily power electronics hardware and does not require firmware updates.
  • Compatibility depends on the drive firmware version in ACS800 or DCS800 systems.
  • When replacing the module, verify the drive parameter group controlling braking chopper activation thresholds remains unchanged.
  • Avoid modifying drive firmware during a hardware swap unless scheduled testing is available. Incorrect parameter changes can trigger overvoltage trips or insufficient braking performance.

 

7. Frequently Asked Questions (FAQ)

Q1: Are these modules genuinely new or refurbished?
These are New Surplus units manufactured by ABB. They have never been installed in equipment and show zero wear on power terminals or connectors.

Q2: Why is the price lower than buying directly from ABB?
OEM ordering includes manufacturing scheduling and distribution margins. Surplus inventory already exists in global supply channels, allowing pricing typically 20–30% below OEM list while remaining new.

Q3: What happens if a braking chopper module fails?
The drive may trip on DC bus overvoltage during deceleration. This can stop conveyors, cranes, rolling mills, or other heavy equipment immediately.

Q4: Is DKTFM418B still widely used?
Yes. It is common in ACS800 and DCS800 drive installations across metals, mining, pulp and paper, and heavy manufacturing sectors.

Q5: Can the module be replaced without changing drive parameters?
In most cases yes. The drive firmware handles braking logic. The replacement module simply performs the switching and energy dissipation.

Q6: Is hot-swapping possible?
No. This module connects to the high-voltage DC bus of the drive system. Always isolate and discharge the bus before replacement.

Q7: What warranty is provided?
Each unit includes a 12month warranty, serial verification, and documented QC inspection covering insulation resistance, gate drive integrity, and thermal interface condition.

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