Eberry Electric Co., Ltd.
We are a professional manufacturer of vacuum circuit breakers. We have 15 years of experience in design and development. We have a professional team responsible for comprehensive solution.
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12KV 24kv Three Pole LBS Load Break Switch 11KV Indoor High Voltage Disconnector Switch Mechanism
Overview:
FZRN25-12D vacuum load switch and combination electric appliance, suitable for three-phase AC 50Hz ring network or terminal power supply and industrial power equipment, for load control and short circuit protection, load switch split load, closed loop current, no load transformer And cable charging current. The combination can break any current up to the rated short-circuit current. Direct-acting isolation fracture and vacuum arc linkage are adopted. With manual and electric functions.
FZRN25-12D's unique transmission structure design, the arc extinguishing chamber is only subjected to high pressure at the moment of closing and breaking, so it is small in size and light in weight.
The FZRN25-12D enables one-time operation of the isolation fracture and the interrupter of the arc chamber.
FZRN25-12D has a grounding valve interlocking with the grounding switch between the static contact and the moving contact conductive tube, which ensures safe and convenient maintenance.
Model and its meaning:
The main technical parameters:
| NO | Item | Unit | Value | ||
| FZN25-12D/T630-20 | FZRN25-12D/T125-31.5 | ||||
| 1 | Rated voltage | KV | 12 | ||
| 2 | Rated frequency | Hz | 50 | ||
| 3 | Rated current | A | 630 | 125 | |
| 4 | Rated insulation level | 1min power frequency withstand voltage | KV | Arc chute break 30; ground, phase 42; isolation fracture 48 | |
| Lightning impulse withstand voltage | KV | Ground, phase 75; isolation fracture 85 | |||
| 5 | Rated dynamic current (peak) | KA | 50 | - | |
| 6 | 4s thermal stable current | KA | 20 | - | |
| 7 | Rated active load breaking current | A | 630 | 125 | |
| 8 | Rated closed-loop breaking current | A | 630 | 125 | |
| 9 | Rated cable charging breaking current | A | 10 | 10 | |
| 10 | Breaking the capacity of the no-load transformer | KVA | 1250 | 1250 | |
| 11 | Rated short-circuit breaking current | KA | - | 31.5 | |
| 12 | Rated transfer current, rated AC current | A | - | 2000 | |
| 13 | Fuse type | - | SDLAK-12 SFLAJ-12 | ||
| 14 | Impactor output energy | J | - | 2-5(medium) | |
| 15 | Rated short circuit closing current | KA | 50 | ||
| 16 | Grounding switch rated dynamic current | KA | 50 | ||
| 17 | Grounding switch 2s thermal stable current | KA | 20 | ||
| 18 | Auxiliary circuit rated voltage | V | AC/CD220;110 | ||
| 19 | Mechanical life | 次/times | 10000 | ||
