Application Scope
The HD series open knife switch and HS series dual-throw switch (hereinafter referred to as “switches”) are suitable for AC 50Hz systems with a rated voltage up to AC 400V and DC 230V, and rated thermal current up to 630A in complete distribution equipment.
Switches with an arc-extinguishing cover are mainly used for making and breaking circuits under load.
Switches without an arc-extinguishing cover are primarily used for circuit isolation.
The products feature a simple structure, convenient operation, and comply with IEC 60947-3 and GB/T 14048.3 standards.
The HD11 series center-handle knife switch is mainly used in power stations to make or break non-load circuits and serves as a power isolation switch.
Normal Operating Conditions
- Ambient air temperature:
- Maximum: +40°C
- Minimum: -5°C
- 24-hour average temperature shall not exceed +35°C
- Altitude: Installation site not exceeding 2000 meters above sea level.
- Atmospheric conditions:
- Relative humidity not exceeding 50% at +40°C
- Higher humidity allowed at lower temperatures (e.g., up to 90% at +20°C)
- Condensation due to temperature variation should be considered
- Pollution degree: Grade 3
- Installation category: Class III
- Installation environment:
Installed in locations free from severe vibration and impact, free from explosive hazards, and without corrosive gases that could damage metal or insulation materials. - For special operating conditions, please consult the manufacturer.
Model & Designation
HD □ □ □ – □ / □
- HD – Open Knife Switch (single-throw)
- Design Code
- 11: Center handle type
- Arc Protection Type
- F: With arc-extinguishing cover
- FA: Protective type (with protective cover)
- Rated Thermal Current
- Number of Poles
- 2P / 3P / 4P
- Connection Method
- 8: Board-front wiring
Structural Features
- For ratings 200A and 400A, single-break structure is adopted; 600A models use double-break structure.
- All blades are equipped with springs to ensure sufficient contact pressure.
- Blade, contact bridge, and contact surfaces are tin-plated to reduce surface contact resistance and improve conductivity.
- The operating mechanism of switches with arc-extinguishing cover ensures safe operation when switching load circuits. The cover is made of insulating material and arc-resistant components, significantly enhancing arc suppression capability.
- The center-handle operating mechanism features fast make-and-break action to improve safety performance. The breaking and making speed of 200A switches is the same as that of 600A switches.
- The switch adopts a visible isolation structure with clearly observable contact position and status indication.
- The insulating base plate and arc barriers are made of high-strength insulating materials, offering excellent mechanical strength and electrical performance.
Technical Specifications
| Parameter | 100A | 200A | 400A | 600A |
|---|---|---|---|---|
| Rated Thermal Current (Ith) | 100A | 200A | 400A | 600A |
| Rated Insulation Voltage (Ui) | 1000V | 1000V | 660V | 660V |
| Rated Operating Voltage (Ue) | 400V / 690V | 400V / 690V | AC400V, DC230V | AC400V, DC230V |
| Rated Frequency | 50Hz | 50Hz | 50Hz | 50Hz |
| Utilization Category | AC-22A | AC-22A | AC-20, AC-23 | AC-20, AC-23 |
| Rated Breaking Capacity (r.m.s) | 1kA | 2kA | 4kA | 6kA |
| Rated Making Capacity (r.m.s) | 1kA | 1.6kA | 3.2kA | 4.8kA |
| 1s Short-Time Withstand Current (r.m.s) | 5kA | 10kA | 20kA | 25kA |
| Mechanical Life (operations) | 20,000 | 10,000 | 10,000 | 5,000 |
| Electrical Life (operations) | 2,000 | 1,000 | 1,000 | 800 |
| Operating Force (F) | ≤ 80N | ≤ 250N | ≤ 300N | ≤ 350N |
Note: Rated breaking and making capacity as well as utilization category AC-23 apply only to switches equipped with arc-extinguishing cover.
Overall Dimensions and Installation Size
1.HD11 Series Overall Dimensions and Mounting Dimensions
HD11/8 (Front Panel) Series
HD11/9 (Rear Panel) Series
Dimensions and Installation Size (mm)
HD11-200 Series
| Poles | A | B/B* | C | C1 | D | E* | a | b/b* | Φc | Terminal Cross Section | Bolt (M) |
|---|---|---|---|---|---|---|---|---|---|---|---|
| 2P | 60 | 123 | 110 | 220 | 70 | 32 | 120 | 140 | 7 | 3.5 × 24.5 | M8 |
| 3P | 190 | 205 / 205 | 110 | 220 | 70 | 32 | 70 | 140 | 7 | 3.5 × 24.5 | M8 |
| 4P | 265 | 230 / 230 | 118 | 238 | 70 | 32 | 140 | 140 | 7 | 3.5 × 24.5 | M8 |
HD11-400 Series
| Poles | A | B/B* | C | C1 | D | E* | a | b/b* | Φc | Terminal Cross Section | Bolt (M) |
|---|---|---|---|---|---|---|---|---|---|---|---|
| 2P | 190 | 265 / 265 | 132 | 270 | 80 | 43 | 160 | 190 | 7 | 4.2 × 36.5 | M12 |
| 3P | 220 | 265 / 265 | 132 | 270 | 80 | 43 | 80 | 190 | 7 | 4.2 × 36.5 | M12 |
| 4P | 300 | 272 / 272 | 130 | 265 | 80 | 43 | 160 | 190 | 7 | 4.2 × 36.5 | M12 |
HD11-600 Series
| Poles | A | B/B* | C | C1 | D | E* | a | b/b* | Φc | Terminal Cross Section | Bolt (M) |
|---|---|---|---|---|---|---|---|---|---|---|---|
| 2P | 240 | 325 / 270 | 112 | 305 | 100 | 55 | 200 | 140 | 9 | 7 × 39 | M16 |
| 3P | 270 | 325 / 270 | 112 | 305 | 100 | 55 | 100 | 140 / 220 | 9 | 7 × 39 | M16 |
| 4P | 370 | 325 / 270 | 112 | 305 | 100 | 55 | 200 | 140 | 9 | 7 × 39 | M16 |
Note: Dimensions marked with “*” refer to the rear-panel mounting type.
HD11F Series Dimensions and Mounting Dimensions
HD11F Series Dimensions and Mounting Dimensions (mm)
HD11F-100
| Poles | A | B | C | C1 | D | E | a | b | Φc | Terminal Cross Section | Bolt (M) |
|---|---|---|---|---|---|---|---|---|---|---|---|
| 2P | 60 | 123 | – | 135 | 32 | – | 64 | 67 | 4.5 | – | M4 |
| 4P | 124 | 123 | – | 135 | 32 | – | 64 | 67 | 4.5 | – | M4 |
HD11F-200
| Poles | A | B | C | C1 | D | E | a | b | Φc | Terminal Cross Section | Bolt (M) |
|---|---|---|---|---|---|---|---|---|---|---|---|
| 2P | 160 | 205 | 110 | 220 | 70 | 32 | 120 | 140 | 7 | 3.2 × 24.5 | M8 |
| 3P | 190 | 205 | 110 | 220 | 70 | 32 | 70 | 140 | 7 | 3.2 × 24.5 | M8 |
| 4P | 265 | 230 | 118 | 238 | 70 | 32 | 140 | 140 | 7 | 3.2 × 24.5 | M8 |
HD11F-400
| Poles | A | B | C | C1 | D | E | a | b | Φc | Terminal Cross Section | Bolt (M) |
|---|---|---|---|---|---|---|---|---|---|---|---|
| 2P | 190 | 265 | 132 | 270 | 80 | 43 | 160 | 190 | 7 | 3.5 × 36.5 | M12 |
| 3P | 220 | 265 | 132 | 270 | 80 | 43 | 80 | 190 | 7 | 3.5 × 36.5 | M12 |
| 4P | 300 | 272 | 130 | 265 | 80 | 43 | 160 | 190 | 7 | 3.5 × 36.5 | M12 |