| Quantity: | |
|---|---|
Center Space | 5.08mm |
Rated Current | 300V, 18A |
Surge Voltage | 4000V |
Insulation Body | PA66, UL94, V - 0 |
Terminal Body | BRASS |
PCB Diameter | Φ1.6mm |
Temperature | -40℃ - 105℃ |
FH 2.5-5.08-00VH-XX Product Diagram
It is rated for 5kV (maximum voltage) and 800A (interrupting capacity), making it suitable for medium-voltage power networks in substations, industrial facilities, and commercial buildings. The switcher features a motor-operated mechanism (with a manual crank handle backup) for remote or local control, and it complies with NEMA (National Electrical Manufacturers Association) Standard CS8-1999 for medium-voltage circuit switchers. It supports 48V DC or 125V DC control voltage (selectable via a jumper) and has an insulation class of Class B (maximum temperature rise of 80°C above ambient), ensuring safe operation in high-load conditions.
Reliable Interruption Performance: Achieves a 5-cycle interrupting time for voltages up to 170kV, meaning it can safely interrupt fault currents in 5 electrical cycles (0.083 seconds at 60Hz) to prevent equipment damage. It uses a vacuum vacuum interrupter to extinguish arcs, eliminating the need for oil or gas insulation and reducing maintenance requirements.
Dual Operation Modes: The motorized mechanism (1/4 HP AC motor) enables remote control via a SCADA system or local control panel, with a reversing contactor to prevent motor damage from incorrect direction. The manual crank handle (stored in the enclosure) provides a backup for power outages, allowing operators to manually open/close the switcher.
Comprehensive Safety Features: Includes an anti-pump relay (prevents multiple closing operations if the control signal is stuck), position indicator lights (red for “open,” green for “closed”) on the front panel, and an operations counter (tracks number of open/close cycles for maintenance scheduling). It also has a ground switch (integrated into the enclosure) for safe maintenance—operators can ground the circuit before accessing internal components.
Durable Enclosure and Accessories: The enclosure is made of 2mm thick cold-rolled steel (painted with anti-corrosion epoxy) with hinged doors for easy access. It includes a cabinet heater (100W, 120V AC) to prevent condensation in humid environments and an internal light (120V AC, LED) for maintenance visibility. The enclosure has a NEMA 3R rating (outdoor use, protected from rain, snow, and sleet).
Substation power distribution: Used in utility substations to switch and isolate medium-voltage circuits (5kV-170kV), connecting/disconnecting transformers or feeder lines.
Industrial power systems: Applied in manufacturing plants (e.g., steel mills, chemical factories) to control power supply to large motors, generators, and process equipment.
Renewable energy plants: Suitable for wind farms and solar power plants to switch power from inverters to the grid, withstanding the variable current from renewable sources.
Commercial building infrastructure: Used in large commercial buildings (malls, airports, hospitals) to distribute power to different zones, ensuring reliable supply to critical systems (emergency lighting, elevators).
Q: What is the duty cycle, and how many operations can it handle?
A: The duty cycle is O-15sec-CO-15sec-CO (Open-15 seconds-Close-Open-15 seconds-Close-Open), suitable for repeated interrupting operations. It has a mechanical life of 5000 open/close cycles and an electrical life of 500 interrupting cycles (at rated current), after which maintenance (e.g., vacuum interrupter replacement) is recommended.
Q: Can it be controlled remotely, and what communication interfaces are available?
A: Yes, it supports remote control via a SCADA system using standard protocols (DNP3.0, IEC 61850) or dry contact signals. The module has an RS485 interface for parameter configuration and status monitoring, and it can send alarm signals (e.g., “switch stuck”) to the control center.
Q: Does it include surge protection, and what accessories are recommended?
A: It does not include built-in surge protection, but optional metal-oxide varistors (MOVs) or surge arrestors (rated for 5kV) are available to protect against voltage surges (e.g., lightning strikes). We also recommend installing a current transformer (CT) for current monitoring and a voltage transformer (VT) for voltage measurement.
Q: What is the maintenance schedule, and what tasks are required?
A: The recommended maintenance cycle is annually. Tasks include: inspecting the vacuum interrupter for leakage (using a vacuum gauge), checking the motor mechanism for wear, cleaning the enclosure and contacts, testing the position indicators and safety relays, and verifying the anti-pump function. For harsh environments (e.g., coastal areas with salt spray), maintenance should be performed every 6 months.
