FZN25-12, FZRN25-12 vacuum load switch and its combination appliance are applicable to three-phase AC 50Hz ring main unit or terminal power supply and industrial electrical equipments for load control and short circuit protection. AC high-voltage vacuum load switch is mainly composed of frame, disconnector, vacuum arc extinguishing chamber, grounding switch, spring operating mechanism, etc. The AC high-voltage vacuum load switch is compact in structure, small in size, long in life, making and closing, strong in breaking capacity, and simple in operation and maintenance. The AC high-voltage vacuum load switch is equipped with spring operation. The motor spring energy storage and closing modes are electromagnet closing and manual opening and closing. The disconnector, vacuum switch and grounding switch are interlocked (mechanical interlocking) to prevent misoperation.
FZN25 and FZRN25 can realize one-time operation of isolating fracture and arc extinguishing chamber fracture.
FZN25-12 and FZRN25-12 have a grounding valve which is interlocked with the grounding switch between the static contact and the moving contact conductor, ensuring safety and facilitating maintenance.
Item | Units | Technical Data | ||
FZN25- 12D/T630-20 | FZRN25- 12D/T125-31.5 | |||
Rated voltage | KA | 12 | ||
Rated frequency | HZ | 50 | ||
Rated Current | A | 630 | 125 | |
Rated insulation level | 1min power frequency withstand voltage | KV | Arc chamber between open contacts 30: | |
Lightning impulse withstand voltage | KV | To earth ,phase to phase 75: | ||
Rated peak withstand curent | KA | 50 | - | |
Rated short-time withstand current | KA | 20 | - | |
Rated active load breaking current | A | 630 | 125 | |
Rated closed-Loop breaking current | A | 630 | 125 | |
Rated cable charging breaking current | A | 10 | 10 | |
Rated breaking no-load transformer capacity | KVA | 1250 | 1250 | |
Rated short-circuit breaking current | KA | - | 31.5 | |
Rated transfer current | A | 2000 | ||
Fuse Model | - | SDLAJ- 12SFLAJ-12 | ||
Impactor outputs energy | J | - | 2-5 | |
Rated short circuit making current | KA | 50 | ||
Earthing switch rated peak withstand current | 50 | |||
Earthing switch rated short-time withstand current | KA | 20 | ||
Auxiliary circuit rated voltage | V | AC/CD220;110 | ||
Mechanical life | times | 1000 | ||
The main models of FZN25-12 series high-voltage vacuum load switch products include:
FZN25-12/630-20, FZN25-12D/630-20, FZN25-12R/630-20, FZRN25-12D/T125-31.5
FZN25-12RD/1250-31.5, FZN25-12RD/1000-31.5, FZN25-12D/630-20
FZN25-12/t630-20, FZN25-12/t1250-31.5, FZN25-12/630A
