| Brand | Wone |
| Model NO. | NFZ77-40.5D wind power special load switch |
| Rated voltage | 40.5kV |
| Rated normal current | 1250A |
| Rated frequency | 50（Hz） |
| shut-off current | 50kA |
| Series | NFZ77 |
Description：
It is mainly composed of a frame, an isolation switch (the current limiting fuse of the combined electrical appliance is installed on the isolation switch), a vacuum interrupter, a grounding switch, a spring operating mechanism, etc.It is suitable for three-phase AC 35kV, 50Hz power system, or used with complete sets of power distribution equipment, ring network switchgear, combined substation, etc.
Industry applications：
It is widely used in wind power generation, urban grid construction and renovation projects, industrial and mining enterprises, high-rise buildings and public facilities, etc., and can be used for power distribution, control and protection of ring network power supply units or terminal equipment.
Features:
State-of-the-art vacuum interrupter.
Compact structure and small size.
Long electrical life and frequent operation.
Strong closing and breaking ability, safe and reliable.
Easy to operate and maintain.
Flexible spring-actuated mechanism
It uses an electric motor (with manual) spring energy storage.
It has the ability of remote control.
There are two methods: electromagnet electric synthesis and interpretation.
It can be equipped with over-current protection function.
Powerful all-in-one features
It integrates circuit breaker, disconnector and grounding switch.
Visible isolation fractures and grounding knives with closing capability.
Reliable mis-proof mechanical interlocks.
The ability to interrupt the rated current (NFZR77-40.5D/T63-31.5 interruptable short-circuit current) and prevent the equipment from running out of phase.
Technical parameters:
We have a professional service team
We have good after-sales
We can guarantee the quality of our products
What is a wind load switch？
A wind power load switch is a specialized switching device used in wind power generation systems. It is primarily used to control and protect the connection lines between wind turbines and the power grid. The switch can connect and disconnect a certain load current under normal conditions and can promptly cut off the circuit when faults such as overloads or short circuits occur, thereby protecting the wind power generation equipment and the power grid.
Operating Principle：
When the wind turbine is generating electricity normally and supplying power to the grid, the wind power load switch is in the closed position, allowing current to flow through the contact system between the generator and the grid. When maintenance or inspection of the wind turbine is required, or when a fault occurs in the grid (such as an overload or short circuit), the operating mechanism drives the contacts apart. At this point, the arc extinguishing system activates, quickly quenching the arc generated by the separation of the contacts, thus interrupting the circuit and providing protection for the electrical system. Once the fault is resolved, the wind power load switch can be reclosed to re-establish the connection between the wind turbine and the grid.
