LIQIANG Intelligent Equipment LIQIANG VD4-12 Vacuum Circuit Breaker The Perfect Drop-in Replacement for ABB VD4 Identical Technical Specs · Precise Dimensional Match · 2-Year Warranty · Lower Procurement Cost |
Zhejiang Liqiang Intelligent Equipment Co., Ltd. (www.lqele.com.cn) is a professional manufacturer specializing in the R&D and production of medium- and high-voltage switchgear, including vacuum circuit breakers, load break switches, and disconnectors, with extensive export experience across Southeast Asia, the Middle East, and Europe. |
Why Replace ABB VD4?
The ABB VD4 is one of the world's most widely deployed 12 kV medium-voltage vacuum circuit breakers. However, a large number of installed units are now facing challenges with maintenance, spare-part shortages, and persistently high prices. Power utilities and switchgear manufacturers alike are actively seeking a replacement solution that offers identical technical specifications, full dimensional compatibility, reliable quality, fast delivery, and competitive pricing.
The LIQIANG VD4-12 series was developed precisely for this purpose. We conducted a parameter-by-parameter cross-reference against ABB VD4's full technical specifications and completed type tests in strict accordance with IEC 62271-100, ensuring that every LIQIANG unit can be installed directly into existing ABB VD4 switchgear without any cabinet modification — eliminating O&M pain points at the source.
★ No Cabinet Modification Required · Secondary Plug Positions Fully Aligned · Primary Contact Finger Spacing Identical · Operating Mechanism Interface Compatible |
Technical Specification Comparison Table
The following data is benchmarked against the ABB VD4 official technical manual and IEC 62271-100 standard. All LIQIANG VD4-12 parameters are fully identical to ABB VD4 reference values:
Technical Parameter | ABB VD4 (Reference) | LIQIANG VD4-12 ✔ |
Rated Voltage | 12 kV | 12 kV |
Max. Operating Voltage | 12 kV | 12 kV |
Rated Current | 630 / 1250 / 2500 A | 630 / 1250 / 2500 A |
Short-Circuit Breaking Current | 20 / 25 / 31.5 kA | 20 / 25 / 31.5 kA |
Short-Circuit Making Current | 50 / 63 / 80 kA | 50 / 63 / 80 kA |
Peak Withstand Current | 50 / 63 / 80 kA | 50 / 63 / 80 kA |
4s Short-Time Withstand Current | 20 / 25 / 31.5 kA | 20 / 25 / 31.5 kA |
Power-Freq. Withstand Voltage (Phase-to-Earth) | 42 kV (1 min) | 42 kV (1 min) |
Power-Freq. Withstand Voltage (Open Contact) | 48 kV (1 min) | 48 kV (1 min) |
Lightning Impulse Withstand (Phase-to-Earth) | 75 kV（peak） | 75 kV（peak） |
Lightning Impulse Withstand (Open Contact) | 85 kV（peak） | 85 kV（peak） |
Rated Operating Sequence | O-0.3s-CO-180s-CO | O-0.3s-CO-180s-CO |
Mechanical Life | 10,000 ops. | 10,000 ops. |
Short-Circuit Breaking Operations | 50 ops. | 50 ops. |
Contact Gap | 11 ± 1 mm | 11 ± 1 mm |
Over-Travel | 3.5 ± 0.5 mm | 3.5 ± 0.5 mm |
3-Phase Closing/Opening Synchronism | ≤ 2 ms | ≤ 2 ms |
Average Opening Speed | 1.1 ± 0.2 m/s | 1.1 ± 0.2 m/s |
Average Closing Speed | 0.6 ± 0.2 m/s | 0.6 ± 0.2 m/s |
Main Circuit Resistance (per phase) | ≤ 50 µΩ | ≤ 50 µΩ |
Operating Mechanism Control Voltage | 110 V / 220 V | 110 V / 220 V |
Applicable Standard | IEC 62271-100 | IEC 62271-100 / GB/T 1984 |
Precise Dimensional Match — True Drop-in Replacement
A genuine "drop-in replacement" demands not only electrical parameter equivalence but also full mechanical interchangeability. The LIQIANG engineering team used original ABB VD4 dimensional drawings as the reference baseline and verified the following critical interface points one by one:
• Primary Circuit: Three-phase contact arm centre distance 210 ± 1 mm — identical to ABB VD4
• Withdrawable Truck: Rail width and depth dimensions matched to ABB VD4 switchgear interface
• Secondary Plug: Interface position and pin assignment aligned — no rewiring required for protection or control circuits
• Mounting Holes: Breaker body fixing hole positions consistent with ABB VD4
• Operating Mechanism: Stored-energy spring mechanism mounting face dimensions compatible, facilitating complete unit swap
On-site replacement time is comparable to a routine ABB VD4 maintenance cycle. No specialised mechanical tooling is required — maintenance personnel can complete the installation following existing operating procedures, significantly reducing outage duration and labour costs.
Six Reasons to Choose LIQIANG
Price Advantage Direct factory sales eliminate multi-tier channel markups. Procurement prices for equivalent specifications are typically 40–55% of ABB OEM pricing — delivering substantial budget savings whether for single spare units or bulk project orders. | Two-Year Quality Guarantee Products carry a 24-month quality guarantee from the date of shipment, covering vacuum interrupter failure, operating mechanism faults, and manufacturing defects — far exceeding the industry-standard 12-month term. |
Ample Stock, Short Lead Times Standard configurations (630 A / 1250 A, 20 kA / 31.5 kA, DC 110 V / 220 V) are kept in stock at all times. Most orders ship within 1–3 weeks — a world apart from ABB OEM lead times of 12–20 weeks. | Complete Type Test Certification The LIQIANG VD4-12 has completed the full IEC 62271-100 type test programme. Test reports are available upon execution of a non-disclosure agreement, supporting engineering review and tendering compliance. |
Independent Spare Parts Supply Critical spare parts — including vacuum interrupters, spring operating mechanisms, secondary plugs, and auxiliary switches — are available for individual purchase, eliminating dependence on ABB OEM supply channels and reducing whole-life O&M costs. | Global After-Sales Support Our specialist technical team provides support via email, WeChat/WhatsApp, and video call, assisting customers remotely with installation commissioning, protection relay setting, and fault analysis. |
Factory Quality Inspection Process
◆ Every Circuit Breaker Must Pass the Following 100% Inspection Items
① Dielectric Test | Power-frequency withstand voltage applied per IEC 62271-100; phase-to-phase, phase-to-earth, and open-contact insulation strength verified |
② Main Circuit Resistance Measurement | Main circuit resistance measured phase by phase; ≤ 50 µΩ for 630 A rating, ≤ 40 µΩ for 1250 A rating |
③ Mechanical Operation Test | 50 consecutive open/close operations at rated control voltage to verify operating mechanism stability |
④ Timing Characteristics Measurement | Opening time, closing time, and 3-phase synchronism all recorded and archived |
⑤ Visual and Dimensional Inspection | Verification of external dimensions, nameplate data, and secondary plug wiring correctness |
A factory inspection report is included with every shipment upon passing all checks. Data is fully traceable, enabling customers to conduct acceptance inspection against the report.
Typical Application Scenarios
The LIQIANG VD4-12 replacement circuit breaker is widely used in the following scenarios:
• Utility company 10 kV / 12 kV substation spare-part replacement
• Industrial facilities (petrochemical, cement, steel, mining, etc.) — in-house substation maintenance
• OEM procurement by switchgear panel manufacturers to reduce overall panel manufacturing cost
• Full fleet replacement projects for end-of-life ABB VD4 units
• Maintenance spare stock for critical facilities such as data centres and hospitals
• Domestic equipment substitution requirements in EPC (Engineering, Procurement & Construction) projects
How to Order
Simply provide the following basic parameters and receive a formal quotation with dimensional drawing within 24 hours:
Rated Current | Please specify: 630 A / 1000 A / 1250 A / 2000 A / 2500 A (or other) |
Short-Circuit Current | Please specify: 20 kA / 25 kA / 31.5 kA |
Control Voltage | Please specify: DC 110 V / DC 220 V / AC 220 V |
Quantity | Single spare units or bulk project orders welcome — enquiries invited |
Delivery Requirements | Please indicate desired delivery date and port of destination (if applicable) |
We provide formal quotations, packing lists, and compliant customs commercial documents, supporting multiple payment terms including T/T and L/C.
Contact LIQIANG Now — Free Technical Consultation & Quotation Free Technical Consultation · Sample Dispatch within 48 Hours · In-Stock Items Ship Immediately www.lqele.com.cn Zhejiang Liqiang Intelligent Equipment Co., Ltd. |
Disclaimer: ABB and VD4 are registered trademarks of ABB Ltd. The LIQIANG VD4-12 series is an independently developed product of LIQIANG, designed and manufactured to IEC 62271-100 and offering electrical and mechanical interface compatibility with the ABB VD4. LIQIANG has no affiliation with ABB Ltd. This article does not constitute an endorsement or authorisation statement for any ABB product.
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