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High Voltage AC Vacuum Load Switch-Fuse Combination Apparatus FTD9-12RD from China Suppliers and Factory
Detail Introduction
This product is suitable for three-phase AC 50/60Hz, 12kV power systems, used in conjunction with complete distribution equipment, ring main units, modular substations, etc. The layout, technical characteristics, appearance, and dimensions of this combination electrical appliance are basically the same as those of the FTD9-12D vacuum load switch, and it is particularly suitable for installation in small and limited spaces.
Quality Standards
GB/T16926 High voltage AC load switch-fuse combination device
NB/T10283 Guidelines for Testing High Voltage AC Load Switch Fuse Combination Electrical Appliances
IEC62271-105 High voltage switchgear and control equipment - Part 105: 1kV~52kV AC load switch fuse combination
Service Conditions
Environmental Temperature
-25℃ ~ +40℃
Altitude
≤ 1000m
Relative Humidity
Daily average relative humidity ≤ 95%
Monthly average relative humidity ≤ 90%
Daily average vapor pressure ≤ 2.2x10-3 MPa
Monthly average vapor pressure ≤ 1.8x10-3 MPa
Monthly average relative humidity ≤ 90%
Daily average vapor pressure ≤ 2.2x10-3 MPa
Monthly average vapor pressure ≤ 1.8x10-3 MPa
Seismic Grade
Seismic intensity ≤ 8
Applicable Location
Free from dripping water, flammable and explosive hazards, chemical corrosive gases, and severe vibrations.
※ Note: When the usage environment deviates from normal usage conditions, please consult with our company to determine.
Technical Data
| Item | Unit | Parameter (Combination device) | |
|---|---|---|---|
| Rated frequency | Hz | 50/60 | |
| Rated voltage | kV | 12 | |
| Rated power frequency withstand voltage (1 minute, r.m.s) | Phase to phase and phase to ground | kV | 42 |
| Isolation fracture | 48 | ||
| Control and auxiliary circuits | 2 | ||
| Rated lightning impulse withstand voltage (peak) | Phase to phase and phase to ground | kV | 75 |
| Isolation fracture | 85 | ||
| Rated current | A | Depends on the fuse | |
| Rated short-circuit breaking current (r.m.s) | kA | Depends on the fuse | |
| Rated short-time withstand current and time | kA/s | / | |
| Rated peak withstand current | kA | / | |
| Rated short-circuit making current (peak) | kA | Depends on the fuse | |
| Rated breaking current of single/back-to-back capacitor group | A | / | |
| Rated capacitor bank making current | kA | / | |
| Rated handover (transfer) current | A | 3150 | |
| Mechanical life | Times | 5000 | |
| Main circuit resistance of each phase | mΩ | ≤250 | |
| Clearance between open contacts | mm | 9±1 | |
| Contacting travel | mm | 5.5±1 | |
| Contact closing bounce time | mm | / | |
| Three-phase asynchronous closing and opening | ms | ≤2 | |
| Average opening speed (contact just opened -6mm) | m/s | 0.9-1.3 | |
| Average closing speed (contact just opened -6mm) | m/s | / | |
| Rated contact pressure | N | 1000±100 | |
| Opening time (at rated voltage) | ms | / | |
| Closing time (at rated voltage) | ms | / | |
| Rated operating sequence | / | ||
Typical Outline Dimensions and Structural Diagram
FTD9-12R (inter-phase distance P=210)
Outline dimension diagram of vacuum load switch-fuse combination apparatus. (This diagram shows the product in the upright position, and the product can also be installed in an inverted position.)
FTD9-12RD (inter-phase distance P=210)
Outline dimension diagram of vacuum load switch-fuse combination apparatus. (This diagram shows the product in the upright position, and the product can also be installed in an inverted position.)
Frequently Asked Questions
What are the primary applications of this combination electrical device?
This product is designed for three-phase AC 50/60Hz, 12kV power systems. It is commonly used in conjunction with complete distribution equipment, ring main units (RMU), and modular substations. It is highly suitable for installations with small and limited space constraints.
Which international and national standards does this product comply with?
The product complies with GB/T16926 (High voltage AC load switch-fuse combination device), NB/T10283 (Guidelines for Testing High Voltage AC Load Switch Fuse Combination Electrical Appliances), and IEC62271-105 (High voltage switchgear and control equipment - Part 105).
What are the standard ambient temperature limits for operating this device?
The normal environmental operating temperature range is between -25℃ and +40℃. If your specific operating environment deviates from these conditions, please consult our technical support team for customized solutions.
Can this vacuum load switch-fuse combination apparatus be installed in an inverted position?
Yes, although the structural diagrams illustrate the product in its standard upright position, it is fully compatible and qualified to be safely installed in an inverted position depending on your spatial configuration.
What is the mechanical life expectancy of this equipment?
This combination device offers a robust mechanical durability rating, tested to perform reliably for up to 5,000 operations under standard conditions.