FZN/FZRN25-12DG/125-31.5 Indoor high voltage vacuum load isolation switch
Technical specification
|
No. |
Item |
Units |
Vacuum load isolation switch |
Vacuum load isolation switch - fuse combinations FZN25-12DG/T200-31.5 |
|
|
FZN25-12DG/T630-25 |
FZN25-12DG/T1250-25 |
||||
|
1 |
Rated voltage |
kV |
12 |
||
|
2 |
Rated frequency |
Hz |
50 |
||
|
3 |
Rated current |
A |
630 |
1250 |
200 |
|
4 |
Rated short time withstand current |
kA |
25 |
||
|
5 |
Rated peak withstand current |
kA |
63 |
||
|
6 |
Rated short-circuit current |
KA |
63 |
80 |
|
|
7 |
Rated active load breaking current |
A |
1250 |
1250 |
|
|
8 |
Rated closed loop breaking current |
A |
1250 |
1250 |
|
|
9 |
Breaking load transformer |
kVA |
2000 |
||
|
10 |
Ground fault current |
A |
20 |
||
|
11 |
Line and cable charging current under earth fault conditions |
A |
20 |
||
|
12 |
Rated short circuit breaking current |
kA |
|
31.5/50 (by the fuse may be) |
|
|
13 |
Rated over current/transfer current |
A |
3150 |
||
|
14 |
Solid divided time |
ms |
45 |
||
|
15 |
Power frequency withstand voltage (1min) |
kV |
White, contrast, vacuum fracture: 42, isolated fracture between:48 |
||
|
16 |
Lightning impulse withstand voltage |
kV |
White, contrast, vacuum fracture: 75. isolated fracture between: 85 |
||
|
17 |
Mechanical life |
Times |
>10000 |
||
Product Model
Vacuum load isolation switch
Vacuum load isolation switch - fuse combinations
Dimension
Product Functions
◆Load Current Switching: Safely makes and breaks load currents in 12kV three-phase AC systems.
◆Transformer Protection: Capable of breaking load transformers up to 2000kVA, protecting critical equipment.
◆Fault Current Handling: Rated overcurrent/transfer current of 3150A ensures reliable coordination with fuses for short-circuit protection.
◆Ground Fault Protection: Handles ground fault currents up to 20A, including line and cable charging currents under earth fault conditions.
◆High-Speed Operation: Over 10,000 mechanical life cycles guarantee long-term operational reliability.
Applicable Environment
◇Rated System: Suitable for 12kV, 50Hz three-phase AC indoor power distribution systems.
◇Temperature Range: Reliable operation in ambient temperatures from -25℃ to +40℃.
◇Installation Altitude: Designed for installation at elevations up to 1000 meters.
◇Humidity Tolerance: Suitable for environments with daily average humidity ≤95% and monthly average ≤90%.
◇Seismic Resistance: Capable of withstanding earthquake intensity up to 8 degrees.
◇Air Quality: Requires environment free from corrosive gases, flammable substances, and significant pollution.
Product Highlights
◆Superior Dielectric Strength: Dual-fracture design with vacuum (42kV/75kV) and isolating (48kV/85kV) ratings ensures excellent insulation.
◆Extended Mechanical Durability: Over 10,000 operations exceed standards for longer life and less maintenance.
◆High Fault Current Capacity: Withstands 25kA short-time current and 3150A overcurrent for robust fault protection.
◆Comprehensive Fault Handling: Rated for 20A ground fault and 20A charging current under earth fault conditions.
◆Industrial-Grade Protection: Handles demanding applications including transformer protection up to 2000kVA.
◆Dual-Function Integration: Combines load switching and visual isolation in one unit, saving space and ensuring safe disconnection.