General
FZN25-12/FZ(R)N25-12D/T indoor high-voltage AC vacuum load switch and FZRN25-12D/T25-31.5 indoor high-voltage AC vacuum load switch-breaker combination electrical appliances are three-phase AC 50H, 12KV power distribution systems The control and protection device of the product is oil-free, non-toxic, non-flammable and explosion-free. It is widely used in industrial and mining enterprises and urban building power distribution stations. The latter has more reliable protection for electrical equipment such as transformers than circuit breakers. Especially suitable In the ring network, dual auxiliary injection power supply units and box-type substations.
FZN25-12D/T630-20 indoor high-voltage AC vacuum load switch hereinafter referred to as load switch is an indoor device with three-phase AC 50H and rated voltage 12KV, suitable for industrial and mining enterprise power distribution stations and substations, as the protection of electrical facilities And control, used to switch load current, closed loop current, no-load transformer and cable charging current. It has a grounding switch capable of closing short-circuit current. The operating mechanism can be manual or electric, which is convenient to realize the three remote control requirements of the power system.
The FZRN25-12D/T25-315 indoor high-voltage AC vacuum load switch-fuse combination appliance (hereinafter referred to as the combination appliance) is an indoor device with a three-phase AC 50 and a rated voltage of 12V. It is suitable for industrial and mining enterprise power distribution stations and substations, etc. In occasions, it also has a grounding switch capable of closing short-circuit current for load control and short-circuit protection. The operating mechanism can be manual or electric, which is convenient to realize the three remote control requirements of the power system.
The main technical parameters
| Serial number | Item | Unit | Parameter | ||
| FZN25-12D/T630/20 | FZRN25-12D/T200/31.5 | ||||
| 1 | Rated voltage | kV | 1 2 | ||
| 2 | Rated current | A | 630 | 200 | |
| 3 | Rated frequency | Hz | 50 | ||
| 4 | Rated absolute | 1 minute Power frequency withstand voltage | kV | Interrupter fracture 30; to ground, phase 42; isolation fracture 48 | |
| Lightning impulse withstand voltage (peak value) | KV | 75 to ground and between phases; isolation port 85 | |||
| 5 | Current before rated short circuit | kA | 20 | ||
| 6 | Rated short-circuit duration | S | 4 | ||
| 7 | Rated peak withstand current | kA | 50 | ||
| 8 | Rated effective load breaking current | A | 630 | ||
| 9 | Rated closed loop breaking current | A | 630 | ||
| 10 | Rated cable charging breaking current | A | 10 | ||
| 11 | Rated breaking no-load transformer capacity | kVA | 1600 | ||
| 12 | Rated short-circuit breaking current | kA | 一 | 31.5 | |
| 13 | Rated transfer current | A | 200 | ||
| 14 | Fuse model | SDLAJ-12 SFLAJ-12 | |||
| 15 | Impactor output energy | J | 1+0.5 | ||
| 16 | Rated short-circuit making current | kA | 50 | 80（Expected value） | |
| 17 | Grounding switch rated short-time withstand current | kA | 20 | ||
| 18 | Grounding switch rated short-circuit duration | S | 2 | ||
| 19 | Grounding switch rated peak withstand current | kA | 50 | ||
| 20 | Auxiliary circuit rated voltage | V | 220 / 110 | ||
| 21 | Mechanical life | Time | 10000 | ||
Overall dimension
