High Voltage Vacuum Contactors (12kV – 40.5kV)
XBRELE LCZ Series offers robust high voltage vacuum contactors engineered for the toughest environments. From 12kV Plateau models (3500m altitude) to 40.5kV ultra-high voltage units, we provide reliable single-pole switching solutions for mining and heavy industry.
Reliable High Voltage Vacuum Contactors for Extreme Conditions
The XBRELE LCZ series is designed to meet the specialized needs of industrial power systems requiring a high voltage vacuum contactor beyond the standard 12kV range. With ratings extending to 40.5kV and specialized single-pole enclosed structures, this series ensures safety and reliability where ordinary contactors fail.
12kV & 15kV Plateau Models (GF): Specifically engineered for high-altitude regions. Verified for installation at altitudes up to 3500 meters, they feature reinforced insulation to prevent flashover in thin air environments like mountain mines.
24kV & 40.5kV Ultra-High Voltage Models: For demanding feeder automation, the LCZ7-40.5F offers powerful breaking capacity. These high voltage vacuum contactors feature extended creepage distances (Impulse withstand up to 185kV), making them ideal for wind farms and heavy industrial grids.
For a broader view of XBRELE’s full switching portfolio, including standard medium-voltage solutions, please visit the Vacuum Contactor pillar page .
Technical Specifications: LCZ High Voltage Vacuum Contactors
Detailed parameters for our single-pole series. Select a voltage range to view specifications for 12kV, 24kV, and 40.5kV models, designed for high-voltage switchgear integration.
12kV & 15kV Models (Standard & Plateau)
This group features the LCZ1 and LCZ7 series designed for 12kV and 15kV applications. A key highlight is the inclusion of “GF” (Plateau) models, which are engineered to withstand the challenging insulation requirements of high-altitude environments up to 3500 meters.
These contactors feature a single-pole enclosed design, making them highly adaptable for custom switchgear in mining, traction power, and industrial control.
Please refer to the table below for the complete list of 15 technical parameters.
Technical Parameters: 12kV / 15kV Models
| No. | Item | Unit | LCZ1-12F | LCZ1-12GF | LCZ7-12GF | LCZ7-15F |
|---|---|---|---|---|---|---|
| 1 | Rated voltage | kV | 12 | 12 | 12 | 15 |
| 2 | Rated current | A | 160-630 | 160-630 | 160-630 | 160-630 |
| 3 | Power freq. withstand | kV | 42 | 42 | 42 | 50 |
| 4 | Lightning impulse | kV | 75 | 75 | 75 | 88 |
| 5 | Rated breaking capacity | A | 8Ie | 8Ie | 8Ie | 8Ie |
| 6 | Rated closing capacity | A | 10Ie | 10Ie | 10Ie | 10Ie |
| 7 | Short-time withstand | kA | 10Ie | 10Ie | 10Ie | 10Ie |
| 8 | Peak withstand | kA | 25Ie | 25Ie | 25Ie | 25Ie |
| 9 | Overload withstand | kA | 15Ie | 15Ie | 15Ie | 15Ie |
| 10 | Short circuit break/close | A | 10Ie | 10Ie | 10Ie | 10Ie |
| 11 | Rated contact gap | mm | 5.5±0.5 | 6±0.5 | 6±0.5 | 6±0.5 |
| 12 | Overtravel | mm | 1.5 | 1.5 | 1.5 | 1.5 |
| 13 | Main circuit resistance | μΩ | – | – | ≤100 | ≤100 |
| 14 | Mechanical life | 10⁴ | 50 | 50 | 50 | 50 |
| 15 | Electrical life (AC3) | 10⁴ | 25 | 25 | 25 | 25 |
Outline & Mounting Dimensions
24kV & 40.5kV Ultra-High Voltage Models
For applications surpassing standard MV ratings, the LCZ series offers reliable high voltage vacuum contactors at 24kV and 40.5kV. The LCZ1 and LCZ7 series in this class feature elongated insulation paths to handle extreme impulse voltages.
The table below provides the complete set of 15 technical specifications for these ultra-high voltage units.
Technical Parameters: 24kV / 40.5kV Models
| No. | Item | Unit | LCZ7-24F | LCZ1-40.5F | LCZ7-40.5F |
|---|---|---|---|---|---|
| 1 | Rated voltage | kV | 24 | 40.5 | 40.5 |
| 2 | Rated current | A | 630, 800 | 630-1250 | 630-1250 |
| 3 | Power freq. withstand | kV | 65 | 95 | 95 |
| 4 | Lightning impulse | kV | 125 | 185 | 185 |
| 5 | Rated breaking capacity | A | 8Ie | 8Ie | 8Ie |
| 6 | Rated closing capacity | A | 10Ie | 10Ie | 10Ie |
| 7 | Rated short-time current | kA | 10Ie | 10 | 10 |
| 8 | Rated peak withstand | kA | 25Ie | 25Ie | 16 |
| 9 | Overload withstand | kA | 15Ie | 10 | 10 |
| 10 | Short circuit break/close | A | 10Ie | 10Ie | 10Ie |
| 11 | Rated contact gap | mm | 9±1 | 17±1 | 17±1 |
| 12 | Overtravel | mm | ≥2 | ≥3 | ≥3 |
| 13 | Main circuit resistance | μΩ | ≤100 | – | ≤100 |
| 14 | Mechanical life | 10⁴ | 20 | 10 | 10 |
| 15 | Electrical life (AC3) | 10⁴ | 10 | 2 | 2 |
Outline & Mounting Dimensions
Engineered for High Voltage & Altitude
The LCZ series goes beyond standard limits. With specialized designs for plateau environments and ultra-high voltages, XBRELE ensures reliable high voltage vacuum contactor performance where others fail.
High-Altitude Performance
The ‘GF’ (Plateau Type) models are specifically designed to overcome the thin air and insulation challenges of high-altitude regions.
- 3500m Rating: Verified for installation at altitudes up to 3500 meters.
- Reinforced Insulation: Enhanced creepage distances to prevent flashovers in low-pressure air.
- Rugged Build: Ideal for mountain mining operations and plateau power grids.
Ultra-High Voltage Range
Covering a voltage spectrum far beyond standard MV contactors, the LCZ series offers reliable control up to 40.5kV.
- Wide Range: Available in 12kV, 15kV, 24kV, and 40.5kV ratings.
- High Impulse Withstand: Up to 185kV BIL (Lightning Impulse) on 40.5kV models.
- Heavy Load Control: Rated currents up to 1250A for large industrial feeders.
Single-Pole Modular Design
The unipolar construction allows for maximum flexibility in switchgear design, especially for custom or restricted spaces.
- Custom Layouts: Install poles individually to fit unique cabinet geometries.
- Remote Control: Designed for direct or remote opening/closing of load circuits.
- Enclosed Pole: Protects the vacuum interrupter from dust and environmental contaminants.
Precision Engineering for High Voltage & Altitude
The LCZ series demands rigorous manufacturing standards. From reinforcing insulation for 3500m altitude to tuning mechanical drives for 40.5kV interrupters, we ensure every single-pole unit is field-ready.
Single-Pole Assembly Process
XBRELE’s dedicated high-voltage line ensures the LCZ series meets the unique dielectric and mechanical requirements of unipolar switchgear.
- 01
Pole Encapsulation & Insulation
For GF models, we verify the integrity of the enclosed pole structure or reinforced insulators to guarantee creepage distances suitable for thin air at 3500m.
- 02
HV Interrupter Alignment
Precise alignment of the 24kV/40.5kV vacuum tubes is critical. We use laser-guided fixtures to ensure concentricity, preventing lateral stress on the bellows.
- 03
Mechanical Tuning
Contact gaps (6mm – 17mm) and overtravel (≥1.5mm – 3mm) are individually calibrated to match the specific voltage rating of each LCZ model.
- 04
Drive Mechanism Integration
Whether utilizing standard coils or permanent magnets, the drive force is adjusted to ensure consistent closing speeds and minimal bounce (<2ms or <3ms).
- 05
Final Dielectric Testing
Every unit undergoes a rigorous power-frequency withstand test (up to 95kV for 40.5kV models) to validate insulation before packing.
Verified for Extreme Conditions
Beyond standard IEC tests, the LCZ series undergoes specialized verification for impulse voltage and high-altitude performance.
High Voltage Electrical Tests
- Power-frequency withstand (42kV – 95kV / 1min)
- Lightning Impulse (BIL) verification (up to 185kV)
- Main circuit resistance check (≤100µΩ)
- Control circuit insulation test (2kV)
Dielectric test reports provided with every shipment.
Mechanical & Environmental
- Mechanical life verification (100k – 500k ops)
- Plateau adaptability check (GF models)
- Visual inspection of pole enclosure integrity
- Operating time measurement (Close/Open ms)
Documentation & Support
- Installation guides for custom pole spacing
- Dimensional drawings for 1-pole integration
- Spare parts (HV coils, rectifiers)
- Technical support for plateau derating
Custom FAT available for critical mining projects.
Logistics for High-Voltage & Plateau Projects
Shipping sensitive high-voltage equipment requires precision. XBRELE provides specialized packaging and engineering support to ensure your LCZ series contactors are ready for installation, from sea level to 3500m.
Flexible Production
We optimize our manufacturing for both standard single-pole orders and custom high-voltage configurations.
- Standard 12kV Models: 15–20 days lead time for typical batch orders.
- Plateau (GF) & 40.5kV: 25–30 days to allow for specialized insulation processing.
- Single-Pole Batches: Efficient grouping for 3-phase set requirements.
- Spare Parts: Fast dispatch for HV coils and vacuum interrupters.
High-Voltage Protection
LCZ units feature extended insulation structures that require careful handling during transit.
- Vertical Bracing: Prevents stress on long insulation poles during transport.
- Anti-Static Wrapping: Protects sensitive vacuum bottle surfaces from dust.
- Export Crating: Heavy-duty plywood cases tailored for single-pole dimensions.
- Impact Sensors: Optional for 40.5kV shipments to monitor handling quality.
Application Expertise
Our team helps you integrate single-pole units into complex switchgear or high-altitude environments.
- Plateau Derating: Technical guidance for insulation correction at high altitudes.
- Layout Design: CAD support for optimizing single-pole spacing in cabinets.
- Interlock Logic: Diagrams for coordinating 3 single-pole units.
- Standards Compliance: Full type test reports for IEC/GB standards.
Common Questions About High Voltage Vacuum Contactors
Engineering insights on selecting LCZ high voltage vacuum contactors for 40.5kV systems, high-altitude mining projects, and specialized industrial switchgear.