| Brand | ROCKWILL |
| Model NO. | Indoor Compressed Load Break Switch for distribution networks-12kV |
| Rated voltage | 12kV |
| Rated normal current | 630A |
| Rated frequency | 50/60Hz |
| Series | FKN |
The FKN12 - 12D pneumatic load break switch (hereinafter referred to as the load break switch) is an indoor high - voltage switching device for three - phase AC 12kV, 50/60Hz. Under normal circuit conditions, it can close, carry and open load current.
It can close short - circuit current and has the ability to carry short - circuit current within a specified time. After the load break switch is equipped with a current - limiting fuse with an impactor, it becomes a load break switch - fuse combined electrical appliance (hereinafter referred to as the combined electrical appliance), which can be used for overload and short - circuit protection of loads (such as power transformers).
This product is suitable for installation in ring main unit switch cabinets, box - type substations and other types of switch cabinets. It is an ideal equipment for the construction, transformation and renewal of current distribution networks, transformation and distribution substations and switch stations.
| Serial No. | Name | Unit | Combined Electrical Appliance | Load Break Switch |
|---|---|---|---|---|
| 1 | Rated Voltage (Maximum Voltage) | kV | 12 | 12 |
| 2 | Rated Frequency | Hz | 50 | 50 |
| 3 | Rated Current | A | Determined by Fuse | 630 |
| 4 | Rated Active Load Breaking Current, Rated Closed-loop Breaking Current | A | - | 630 |
| 5 | Rated Short-time Withstand Current - Load Break Switch | kA | - | 20 |
| Rated Short-time Withstand Current - Load Break Switch | kA | - | 20 | |
| 6 | Rated Short-circuit Making Current, Rated Peak Withstand Current | kA | 80 | 50 |
| 7 | 1min Power Frequency Withstand Voltage, Phase-to-Phase/Phase-to-Ground/Isolation Gap | kV | 42/48 | 42/48 |
| 8 | Lightning Impulse Withstand Voltage (Peak Value) - Phase-to-Phase/Phase-to-Ground/Isolation Gap | - | 75/85 | 75/85 |
| 9 | Rated Cable Charging Breaking Current | A | 10 | 10 |
| 10 | Rated Short-circuit Breaking Current | - | 31.5 | ≤120 |
| 11 | Rated Transfer Current | μΩ | 1200 | - |
| 12 | Loop Resistance Between Static Contact Blade Mounting Seat to Moving Contact Blade Mounting Seat | μΩ | ≤120 | ≤320 |
| 13 | Loop Resistance Between Inlet and Outlet (For Combined Electrical Appliance, Replace Fuse with Tinned Copper Bar) | - | ≤320 | - |
| 14 | Left-mounted or Right-mounted Overall Dimensions (Height × Width × Depth) | - | 880×429×880 | 880×337×880 |
| 15 | Front-mounted Overall Dimensions (Height × Width × Depth) | mm | 880×851×(Y) Y Determined by Customer |
| Serial No. | Name | Unit | Value |
|---|---|---|---|
| 1 | Opening distance between dynamic and static arc contacts at opening position | mm | ≥150 |
| 2 | Contact stroke | mm | ≥10 |
| 3 | Closing speed | m/s | ≥2.5 |
| 4 | Opening speed | m/s | ≥1.8 |
| 5 | Three-phase closing asynchronism | ms | ≤10 |
| 6 | Three-phase opening asynchronism | ms | ≤5 |
| 7 | Opening distance between dynamic and static contacts of earthing switch | mm | ≥150 |
| 8 | Mechanical life | times | ≥2000 |
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