FN5-12R/630A High Voltage Load Switch | Indoor AC Load Switch-Fuse Combination Apparatus

Overview

The FN5-12R(L) indoor AC high voltage load switch-fuse combination apparatus is independently designed and developed by our factory after absorbing foreign technology and combining domestic power supply requirements. This product has passed comprehensive type tests and long-term trial operation, with performance meeting the requirements of IEC420 "AC High Voltage Load Switch-Fuse Combination Apparatus" (1990 edition) and GB3804 "3-63KV AC High Voltage Load Switch" standards. Compared with similar foreign products, technical parameters have reached the same level, with small size, light weight, suitable for ring main units and compact substations, widely used in power distribution of 12kV lines, and effectively avoiding phase-failure operation of equipment. FN5-12R/630A High Voltage Load Switch adopts the puffer type arc extinguishing principle, with compact structure and economical cost. With current-limiting fuses, it can replace circuit breakers for transformer protection in 12kV distribution systems.

The successful development of this product fills a domestic gap, achieving three positions: switch, isolation and earthing.

Applications

The FN5-12R(L) indoor AC high voltage load switch-fuse combination apparatus, also known as a load switch with tripping device (hereinafter referred to as the switch), is suitable for 50Hz, rated voltage 6-12kV networks, capable of breaking load current, overload current and short-circuit current. This load switch is equipped with a CS6-Ⅰ manual operating mechanism, or a dedicated CS□ manual mechanism.

Model Designation

Service Environment

• Altitude not exceeding 1000m;
• Upper ambient air temperature +40degC, lower limit -25degC;
• Relative humidity: daily average not greater than 95%, monthly average not greater than 90% (at +25degC);
• Surrounding air shall be free from obvious pollution by corrosive or flammable gases, etc.;
• No frequent violent movement.

Technical Parameters

1. The technical parameters of the load switch-fuse combination apparatus are shown in the following table:

2. The technical parameters of the load switch used in the combination apparatus are shown in the following table.

Outline Drawing

FN5-12D Indoor AC High Voltage Load Switch

FN5-12R Indoor AC High Voltage Load Switch

FN5-12DR Indoor AC High Voltage Load Switch

FN5-12R/S Indoor AC High Voltage Load Switch

FN5-12R(L) Indoor AC High Voltage Load Switch

FN5-12RD(L) Indoor AC High Voltage Load Switch

1. Installation Drawing of Connection between Load Switch and CS□ Operating Mechanism

1. Installation Drawing of Connection between Load Switch and CS□ Operating Mechanism

1. Load switch 2. Elbow connection 3. 3/4" welded steel pipe (user supplied) 4. Operating mechanism

Cs6 Operating Mechanism Hole Dimension Drawing CS□ Operating Mechanism Hole Dimension Drawing (Side View)

CS□ Operating Mechanism Hole Dimension Drawing (Front View)

Ensure that FN5-12R/630A High Voltage Load Switch FN5-12R(L) load switch achieves three positions: switch, isolation and earthing. Verify the correctness of the five-prevention interlock logic during installation. Select the fuse rated current with a 1.5 times margin of the transformer. Regularly check the contact silver plating layer and the contact resistance of the earthing blade...