Indoor Load Break Switch

Juhui Power Equipment Co., Ltd. manufactures indoor high-voltage vacuum load break switches and fuse combined apparatus. Our factory covers 1,500 square meters, has a dedicated research team, and also serves global brand customers. The Indoor Load Break Switch includes the FZN25-12D and FZRN25-12D models, as well as the FZRN25-12D/T200-31.5 load break switch and fuse combined apparatus. It is used for control and protection in three-phase AC 50Hz, 12kV distribution systems. The product contains no oil or toxic materials and has no fire or explosion risk. It is suitable for industrial plants and urban building power distribution stations. The FZN25-12D/T630-20 switches load current, closed-loop current, no-load transformer current, and cable charging current. The earthing switch can make short-circuit current. Manual and electric operating options are available, with support for remote control, remote signaling, and remote measurement. The FZRN25-12D/T200-31.5 combined apparatus provides load control and short-circuit protection. Its transformer protection performance is better than that of a circuit breaker. It also has an earthing switch capable of making short-circuit current, with manual and electric operating options and support for remote control, remote signaling, and remote measurement. The unit is suitable for ring main and double-radiation supply units and box substations. The MOQ is 1 unit or 1 set.

The Indoor Load Break Switch is suitable for the specified operating conditions. The ambient temperature ranges from -40°C to +40°C, and the applicable altitude is no more than 3,000 meters. As the altitude increases, the required rated insulation level must also increase. The operating environment may contain dust, smoke, corrosive gases, steam, and salt spray, with a pollution grade of Class IV. The wind speed is no more than 34m/s, and the wind pressure on the cylinder surface is 700Pa. External vibration and ground movement can be disregarded. For special conditions beyond these limits, customized production is available. The FZN25-12D/T630-20 has a rated voltage of 12kV, rated current of 630A, and rated frequency of 50Hz. The FZRN25-12D/T200-31.5 has a rated voltage of 12kV, rated current of 200A, and rated frequency of 50Hz. The rated 1-minute power frequency withstand voltage is 30kV across the arc chamber gap, 42kV between phase-to-ground and phase-to-phase, and 48kV across the isolation gap. The rated lightning impulse withstand voltage peak is 75kV between phase-to-ground and phase-to-phase and 85kV across the isolation gap. The rated short-time withstand current is 20kA, with a rated short-circuit duration of 4s. The rated peak withstand current is 50kA, and the rated no-load transformer breaking capacity is 1,600kVA. For the FZRN25-12D/T200-31.5, the rated short-circuit breaking current is 31.5kA and the rated transfer current is 200A. Applicable fuse models are SDLAJ-12 and SFLAJ-12. The striker output energy is 1+0.5. The rated short-circuit making current is 50kA for the FZN25-12D/T630-20 and 80kA expected value for the FZRN25-12D/T200-31.5. The earthing switch has a rated short-time withstand current of 20kA, a rated short-circuit duration of 2s, and a rated peak withstand current of 50kA. The auxiliary circuit rated voltage is AC220V/AC110V. The mechanical life is 10,000 operations. The product is equipped with an earthing switch for service and maintenance work. During selection, customers should confirm the earthing switch data, interlock method, and operating method.

The Indoor Load Break Switch is equipped with an earthing switch for service and maintenance work. The earthing switch can make short-circuit current, so its technical data should be confirmed during product selection. Customers should also confirm the interlock method and operating method. Manual and electric operating options are available, with support for remote control, remote signaling, and remote measurement. Third-party inspection is accepted, and 100% inspection is carried out before packing. The warranty period is one year.

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