Operating Conditions:

• Ambient temperature: -30℃ to +40℃

• Relative humidity: Daily average ≤95%, monthly average ≤90%

• Maximum altitude: 3000 meters

Product Features (35kV with Isolating Switch):

• Customizable options: Prefabricated plug-in connectors or cold/hot-shrink cable terminations.

• Fully insulated, fully sealed, fully waterproof, maintenance-free, safe, and reliable.

Functional Characteristics:

• Fully insulated, fully sealed, maintenance-free, ensuring personal safety.

• Eco-friendly outdoor design with HV live display simplifies urban cable networks and reduces investment.

• Outdoor type, dustproof, moisture-proof, flood-resistant, corrosion-resistant, highly adaptable, flexible configuration.

• Compact size, aesthetically pleasing, simple installation, easy operational switching.

• Can be equipped with voltage indicators, fault indicators, lightning arresters, etc.

• Advanced domestic HV equipment, filling the gap for 40.5kV(35kV) switch-equipped branching cabinets.

• Suitable for 35kV AC 50Hz/60Hz transmission/distribution lines; can be used in 35kV prefabricated substations.

• Reduces cable runs and footprint, improves power supply reliability.

• Can be equipped with GN27-40.5 isolating switches for circuit switching under voltage, no-load conditions.

Technical Parameters:

1. Rated Voltage: 40.5kV

2. Rated Operational Voltage: 35kV

3. Rated Current: 630A

4. Frequency: 50Hz

5. Circuit Breaker Rated Breaking Current: 20kA

6. Rated Short-Time Withstand Current: 20kA (Incoming & Main Bus) / 20kA (Outgoing)

7. Rated Short-Time Current Duration: 3s

8. Rated Peak Withstand Current: 50kA (Incoming & Main Bus) / 50kA (Outgoing)

9. Circuit Breaker Rated Breaking Operations: 20 times

10. Insulation Level:

    • 1min power-frequency withstand voltage: 42kV (ground) / 48kV (break)

    • Lightning impulse withstand voltage: 95kV (ground) / 110kV (break)

11. Load Switch Breaking Capacity:

    • Normal load current: 630A

    • Earth fault current: 95A

    • No-load current: 30A

Mechanical Life:

• Circuit Breaker: 10,000 operations

• Load Switch: 2,000 operations

• Manual operating mechanism

Operating Times:

• Circuit Breaker Closing: 0.2s

• Circuit Breaker Opening: 0.06s

• Close-Open Time: 0.002s

• Circuit Breaker Bounce Time: 0.002s

• Clear open/close position indication required.

• Main System Configuration: BIBI

• Space and interfaces reserved for FTU unit.

Cabinet Structure & Features:

1. Enclosure made of imported aluminum-zinc coated steel or cold-rolled steel.

2. Reliable “five-prevention” interlock; HV live display.

3. Protection rating ≥ IP3X.

4. Wiring diagram on each cabinet door.

5. Concealed lock on enclosure.

Key Features:

1. Outdoor/indoor use, fully sealed, “five-prevention” safety, maintenance-free.

2. Eco-friendly with HV display, simplifies networks, saves investment.

3. Weather-resistant, flexible configuration for various wiring needs.

4. Compact, aesthetically pleasing, easy installation/operation, flexible protection.

5. Small footprint, low height, blends with environment, flexible wiring.

Operating Environment:

• Location: Outdoor

• Seismic Intensity: 8 degrees

• Altitude: ≤1000m

• Weather Conditions:

  • Ambient temperature: -10℃ to +45℃

  • Daily temperature variation: 30℃

  • Wind speed: 35m/s (10m height, 15-year return, 10-min avg)

  • Solar radiation: 0.1W/cm², 0.5m/s wind

  • Relative humidity: Daily avg 95%, monthly avg 90% (25℃)

  • Pollution level: Grade IV

  • Ice thickness: 0-30mm

System Conditions:

• Rated Frequency: 50Hz

• Nominal Voltage: 35kV

• Operational Voltage: 40.5kV

• Rated Power-Frequency Voltage (conductor to earth/screen): 26kV

Technical Requirements:

Basic Parameters:

Design & Structure Requirements:

• Function: For interconnecting cable lines and connecting to branch lines outdoors, enabling power distribution. Uses TMY copper busbars, composite insulation. Safe clearance ≥400mm.

• Safety Design: Ensures safe operation, inspection, maintenance, voltage status indication, phasing, cable grounding, testing, and static discharge.

• Enclosure:

  • Material: ≥3.0mm stainless steel or cold-rolled steel, robust for handling.

  • Coating: Electrostatic spray ≥150μm, uniform, adherent, color-fast for 15+ years.

  • Color: Coordinates with environment, clear warning signs.

  • Doors: Open >90°, with stops, seals, handles, concealed latches, rain/rust proof hinges, locks, external lock points.

  • Ventilation: Natural vents to reduce condensation.

  • Internal Insulation Barrier: With safety warnings.

  • Roof: Rain shield.

  • Diagram: Internal schematic with operating instructions.

  • Lifting: 4 lifting rings.

  • Waterproof: Protection rating ≥ IP54.

• Earthing:

  • Complies with DL/T 621-1997. All exposed metal earthed.

  • Earthing conductor withstands rated short-time/peak current.

  • Dedicated earthing conductor with ≥2 visible connection points, clearly marked.

• Insulation:

  • Composite insulation. Safe clearance ≥400mm.

  • Insulators: Flame-retardant, creepage distance >16mm/kV, support insulator creepage ≥648mm.