Wind farm HGRW-35/200A drop out fuse supplied by the manufacturer

Wind farm HGRW-35/200A drop out fuse supplied by the manufacturer

35KV outdoor high-voltage fuse manufacturer HGRW-35 is 35kVA commonly used short-circuit protection switch for branch lines of distribution lines and distribution transformers, which has the characteristics of economy, convenient operation, and strong adaptability to outdoor environments. It is widely used in 35kVThe primary side of distribution lines and distribution transformers are used for protection and equipment switching operations.

It is installed at 35kVOn the branch line of the distribution line, the power outage range can be reduced because it has a high-voltage drop out fuse with a clear disconnection point, which has the function of an isolation switch, creating a safe working environment for the maintenance section lines and equipment, and increasing the sense of safety of maintenance personnel. Installed on distribution transformers, it can serve as the main protection for distribution transformers, so10kVDistribution lines and distribution transformers have become popular.

Drop out fuseInstallation: 35KV outdoor high-voltage fuse manufacturer HGRW-35

(1) During installation, the melt should be tightened (causing a tensile force of approximately 24.5N on the melt), otherwise it is easy to cause the contact to heat up.

(2) The fuse installed on the crossbar (frame) should be firm and reliable, without any shaking or shaking phenomenon.

(3) The melting tube should have a downward inclination angle of 25 °± 2 ° to facilitate the rapid drop of the melting tube by its own weight when the melt melts.

(4) The fuse should be installed on a cross arm (frame) with a vertical distance of not less than 4m from the ground. If installed above the distribution transformer, it should maintain a horizontal distance of at least 0.5m from the outer contour boundary of the distribution transformer to prevent other accidents caused by the melting tube falling.

(5) The length of the melting tube should be adjusted appropriately, and it is required that the duckbill tongue can hold more than two-thirds of the length of the contact after closing to avoid accidental dropping during operation. The melting tube should not be pushed to the death of the duckbill to prevent the melting tube from falling in time after melting.

(6) The melt used must be a standard product from a legitimate manufacturer and have a certain mechanical strength. Generally, the melt must be able to withstand a tensile force of at least 147N.

(7) The 35kV drop out fuse is installed outdoors, requiring a phase to phase distance greater than 1750px.

Operation of drop out fuse: 35KV outdoor high-voltage fuse manufacturer HGRW-35

Under normal circumstances, it is not allowed to operate drop out fuses with load, only allowed to operate unloaded equipment (lines). However, branch lines of 10kV distribution lines in rural power grids and distribution transformers with a rated capacity of less than 200kVA are allowed to operate with load according to the following requirements:

(1) Two people are responsible for the operation (one for supervision and one for operation), but they must wear tested and qualified insulated gloves, insulated boots, goggles, and use qualified insulated rods with matching voltage levels for operation. Operation is prohibited in climate with lightning or heavy rain.

(2) When pulling the brake, it is generally stipulated to first pull off the middle phase, then pull off the leeward side phase, and finally pull off the windward side phase. This is because the distribution transformer has changed from three-phase operation to two-phase operation, and the arc spark generated when the middle phase is pulled off is * * * small, which does not cause a phase to phase short circuit. Next is to break the leeward phase, as the middle phase has been pulled apart and the distance between the leeward phase and the windward phase has doubled. Even if overvoltage occurs, the possibility of a phase to phase short circuit is very small. ***When the windward side phase is pulled apart, only the capacitive current to ground is generated, and the electric spark produced is already very slight.

(3) When closing the circuit breaker, the operation sequence is reversed when closing the circuit breaker. Close the windward phase first, then close the leeward phase, and finally close the middle phase.

(4) Operating the melting tube is a frequent task, and if not noticed, it can cause contact burns and poor contact, leading to overheating of the contacts and annealing of the spring, resulting in even worse contact and forming a vicious cycle. So, when pulling and closing the melting tube, moderate force should be applied. After closing, carefully check that the duckbill tongue can tightly grasp more than two-thirds of the tongue length. You can use a brake lever to hook the upper duckbill and press it down a few times, then gently try pulling to check if it is closed properly. Failure to close in place or securely, insufficient pressure on the static contacts of the fuse, can easily cause contact burns or the fuse tube to fall off on its own.

Overview:
Drop out fuse is a common short-circuit protection switch for branch lines of distribution lines and distribution transformers. It has the characteristics of economy, easy operation, and strong adaptability to outdoor environments, and is widely used in the primary side of distribution lines and distribution transformers for protection and equipment switching operations. Installed on the branch of the distribution line, it can reduce the range of power outages. Due to its obvious disconnection point, it has the function of an isolation switch, creating a safe working environment for maintenance lines and equipment, and increasing the safety of maintenance personnel. A drop out fuse with a pulling load, equipped with elastic auxiliary contacts and an arc extinguishing cover, used to switch the rated load current.
Purpose and execution standards:
This product is used for 35kV distribution line branch lines and primary side of distribution transformers, for overload and short-circuit protection, and for switching rated load currents.
This product model is formulated according to the provisions of JB/T8321-1996 "Method for Formulating AC High Voltage Fuse Models", and the product parameters are implemented in accordance with GB15166.3-1994 "AC High Voltage Fuse Spray Fuse" standard. For important parameters and configuration methods that are not clearly defined in this standard, they shall be corrected and implemented in accordance with the requirements of JB/DQ2139-1986 "Provisional Technical Conditions for 10-35kV Outdoor AC High Voltage Drop out Fuses".
Usage conditions:
*Environmental temperature: not higher than+40 ℃, not lower than -30 ℃;
*Altitude: not exceeding 1000m; (Above 1000m, it can be adjusted according to GB311.1-1997);
*Power frequency: 50 ± 2Hz;
*Places without serious pollution, chemical corrosion, flammability, explosiveness, and severe vibration;
*Wind speed: 35m/s;

Wind farm HGRW-35/200A drop out fuse supplied by the manufacturer