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ABB DRIVE COMPONENT / DC-LINK BALANCING
3X4K7Capacitor balance resistor assembly
ABB 3X4K7 is a three-element 4.7 kOhm capacitor-balancing resistor assembly used in an ABB drive DC-link arrangement. Its role is to equalize voltage across series-connected capacitor sections and provide a controlled discharge path after input power is removed. |
ENGINEERING FOCUS
BALANCE THE DC LINK
Exact identity / installed duty / controlled replacement
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| ABB 3X4K7 is a three-element 4.7 kOhm capacitor-balancing resistor assembly used in an ABB drive DC-link arrangement. Its role is to equalize voltage across series-connected capacitor sections and provide a controlled discharge path after input power is removed. |
ORDERING IDENTITY
Brand: ABB
Model: 3X4K7 Type: Capacitor balance resistor assembly |
| Send Exact Model for Quote | sales@amikon.cn | WhatsApp 86-18020776792 |
| Sales manager: Miya zheng | ||
| Installed Function |
The assembly is connected across DC-link capacitor sections. Parallel resistor paths stabilize static voltage division and help residual voltage decay after shutdown. It is a passive high-voltage component; it does not measure, communicate or control the drive. |
| Component type | Capacitor balance resistor assembly |
| Element arrangement | Three resistor elements |
| Nominal element value | 4.7 kOhm each |
| Circuit location | Drive DC-link capacitor bank |
| Primary duty | Voltage sharing and controlled discharge |
| Mounting | Insulated cabinet assembly |
| Connection control | Reproduce installed lead positions |
| Replacement basis | Exact label, resistance and mechanical match |
| IDENTITY | ROLE / DIFFERENCE | SELECTION POINT |
|---|---|---|
| 3X4K7 | 3 x 4.7 kOhm | This resistor assembly |
| Installed capacitor bank | Series DC-link sections | Must match the original circuit arrangement |
| ACS drive cabinet | Application-dependent | Confirm drive type and frame from the nameplate |
| Similar resistor pack | Appearance may match | Resistance, power and insulation must all match |
| 1 | Lock out the drive and wait the stated discharge interval before opening the cabinet. |
| 2 | Measure DC-bus voltage with a suitable instrument; never assume the resistor has discharged the capacitors. |
| 3 | Photograph and label every conductor before removal. |
| 4 | Inspect ceramic bodies, insulation, terminals and mounting clearances for heat damage. |
| 5 | After replacement, verify equal voltage division across the capacitor sections. |
| Contact Miya zheng | sales@amikon.cn | WhatsApp 86-18020776792 |
| Sales manager: Miya zheng | ||
| 01 |
What must be matched before ordering 3X4K7?
Match the complete model text, all suffixes, electrical rating, revision, connectors, mounting and the host equipment identity.
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| 02 |
Can 3X4K7 be selected by appearance alone?
No. Similar dimensions do not establish electrical or functional interchangeability. Use the installed label and circuit role.
|
| 03 |
What condition checks matter for 3X4K7?
Check terminals, insulation, heat discoloration, mechanical damage and any related cooling or protection hardware before installation.
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| 04 |
What should be recorded before replacing 3X4K7?
Record wiring positions, jumpers, connector orientation, mounting hardware, companion components and operating settings.
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| 05 |
What should be tested after installing 3X4K7?
Complete controlled energization, status and protection checks, then verify operation under the approved commissioning procedure.
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| Request Ordering Support | sales@amikon.cn | WhatsApp 86-18020776792 |
| Sales manager: Miya zheng | ||
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