$ 96.54
Description Product Introduction The ABB AGDR-76C is a gate driver board for the larger ACS800 drives—specifically frames R7 and R8. This board sits directly above the IGBT modules, taking fiber-optic signals from the AINT/TINT interface board and converting them into the high-current gate pulses that turn the IGBTs on and off. It also handles desaturation detection (short-circuit protection) and reports faults back to the control board. What makes the ABB AGDR-76C critical is its isolation and protection features. Each IGBT has its own isolated power supply on this board, so a fault on one phase doesn’t take down the others. The “C” revision adds faster desaturation detection and improved noise immunity over the earlier “B” version. In my experience, these boards fail when the IGBTs short—the fault current can blow back through the gate driver. If you’re replacing a blown IGBT module in an R7 or R8 frame, replace the AGDR board at the same time. A damaged gate driver will take out the new IGBT within minutes. Key Technical Specifications Parameter Specification Model ABB AGDR-76C Series ACS800 Board Type Gate Driver (IGBT Driver) Gate Drive Channels 6 (for 3-phase IGBT module) Input Fiber-optic (DDCS) from AINT/TINT board Output IGBT gate pulses (typically ±15 V) Gate Power Isolated per IGBT (from DC-DC converter) Protection Desaturation (Vce monitoring), undervoltage lockout Fault Reporting Fiber-optic return to control board Status Indication LEDs for power, gate enable, fault Power Supply 24 VDC from drive auxiliary supply Mounting ACS800 power section (R7, R8 frames) Operating Temp -10°C to 70°C Compatibility ACS800 frames R7, R8; certain liquid-cooled variants The ABB AGDR-76C contains no firmware. It is a hardware-only gate driver board. No configuration, no programming, no firmware upgrades. Hardware revisions: The “C” revision is the final production version. It is backward-compatible with AGDR-76A and AGDR-76B. Installation: The board mounts on standoffs above the IGBT modules. Fiber-optic cables connect to the AINT/TINT board. Power and gate drive connections are made via ribbon cables or direct pin headers. The board is specific to the IGBT module layout in R7/R8 frames—it does not fit smaller frames. Field note: The ABB AGDR-76C has two fiber-optic connectors. One is for gate drive signals (from the control board). The other is for fault feedback (to the control board). If you swap them, the drive will show a “COMM LOSS” fault and won’t run. They’re usually labeled—match TX to RX. Original Model Replacement Model Compatibility Level Key Notes ABB AGDR-76A ABB AGDR-76C Drop-in Same mounting, same connectors. The C revision has faster protection. Direct swap. ABB AGDR-76B ABB AGDR-76C Drop-in Direct replacement. The C revision is the final version. No wiring changes. ABB AGDR-76C (same) ABB AGDR-76C Drop-in Direct replacement. Any C revision is interchangeable. ABB AGDR-71C (smaller frame) ABB AGDR-76C Incompatible Different form factor. AGDR-71 is for R5/R6 frames. Not interchangeable. ABB AGDR-78C (larger frame) ABB AGDR-76C Incompatible AGDR-78 is for R8i or larger IGBT modules. Different mounting. Frequently Asked Questions Q: What ACS800 frames use the AGDR-76C? The ABB AGDR-76C is used in ACS800 frames R7 and R8. These are typically drives in the 315 kW to 630 kW range (depending on voltage). It does not fit R2–R6 frames. Check your drive’s frame size on the type code label. Q: How do I know if this board has failed? Common symptoms: drive shows “IGBT FAULT,” “SHORT CIRCUIT,” or “GATE DRIVE FAULT.” On the ABB AGDR-76C, the status LEDs can help. If the power LED is off, the 24 V supply is missing. If the gate enable LED is on but the drive faults when it tries to run, the board is likely bad. If you’ve already replaced the IGBT module and still get faults, replace the AGDR board. Q: Can I test this board outside the drive? Not fully. You can do basic checks: visual inspection for burned components, bulging capacitors, or cracked solder joints. Check the fiber-optic connectors for cleanliness. Beyond that, install it in a known-good drive and test. The requires the drive’s control system to generate gate drive signals. Q: What happens if the fiber-optic cables are swapped? The has two fiber connections. If you swap them, the drive will lose communication with the gate driver and show a “COMM LOSS” or “BOARD FAULT.” The fiber connectors are usually labeled. Match the TX from the AINT board to the RX on the AGDR, and the RX to the TX. Q: My drive runs but trips on overcurrent at low speed. Could the AGDR cause that? Yes. If the has a damaged desaturation circuit, it may falsely detect a short circuit and trip the drive. This often happens at low speeds where the IGBTs are switching at low current—the noise can trigger false desat faults. Replace the board. Q: Do I need to replace the AGDR when I replace the IGBT module? Yes. If the IGBT module shorted, it almost certainly sent fault current back through the gate driver. The has protection, but it’s not bulletproof. In my experience, 70% of IGBT failures also damage the gate driver board. Replace both at the same time to avoid a repeat failure. Q: What’s the difference between AGDR-76C and AGDR-76B? The “C” revision added faster desaturation detection (reduced reaction time from 10 µs to 3 µs) and improved noise filtering on the gate drive outputs. It also uses a different fiber-optic transceiver that’s more tolerant of cable length variations. Electrically, they are compatible—the C revision is the preferred replacement. Q: How do I align the board with the IGBT modules? The mounts on standoffs that align with the IGBT modules. The board has spring-loaded pins that make contact with the IGBT gate terminals. When installing, lower the board straight down—don’t slide it. Misalignment can bend the pins and cause intermittent gate drive faults. A06B-6083-H230 PLC U-D6REM MDV60A-0750-503-4-00 PLC MDR60A-0750-503-00 31C110-503-4-00 PLC (KOLLMORGEN) PLC 845G-F3GAHP8192R Email: [email protected] Phone: 86 15340683922 Sales:Wu Jiedong Our products are guaranteed for 1 year, with new and original production stopped and imported spare parts. All prices listed on the official website are subject to confirmation by contact: Wu Jiedong (manager). Our product: brand new original packaging Our warranty: All new or repaired parts have a 12 month warranty period beginning Our payment: 100% telegraphic transfer of inventory items before shipment, conditions can be proposed! If you have any downtime spare parts that you cannot find, please feel free to call or use email to contact me. If there are issues that the product cannot solve, please contact me. Product prices can be negotiated. Please do not consider contacting me!
