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auto reclosers
The VX4 series of Automatic Circuit Recloser is clearly the most advanced and safe product of its kind on today's market. It is built on the well proven VX, Vacuum circuit breaker module and the FTU Recloser controller.
- Non enclosed switch for extra safety
- Core balance transformer for detecting low earth faults
- Operation On and Off without electric power
- Solid insulated. No harmful SF6 gas
- Same footprint as ABB NAL loadbreak switch
- Frame of stainless steel
Module ofVacuum Interrupter
- High current vacuum breaker element, AMF type
- 630 or 1250A continuous line load
- 20 or 25kA fault current in max 3 sec
- Bushings of epoxy resin
- Optional Integrated and synchronized air break switch
- Optional Visible open points on all 3-phases
- Integrated 3x phase current transformers
- Integrated 1x core balance CT for low earth faults
- Frame made of 5 and 4mm SIS 2333 stainless steel
- Electrical circuit made of copper
- No electro chemical corrossion
- Integrated heater
- 3 Phase CT with low earth faults (400mA) capacity
- Manual maneuver of both vacuum interrupter and air break switch
- Design specification IEC 62271-111
- Marking specification IEEE std C37.60
VX4Electrical diagram
VX4Technical data
| Description | Vx4-240 | Vx4-240 | |
| Rated maximum voltage | 24 kV | 24 kV | |
| Rated basic impulse level, P>P | 145 kV | 145 kV | |
| Rated basic impulse level, P>E | 125 kV | 125 kV | |
| Power frequency withstand, Dry | 65 kV | 65 kV | |
| Power frequency withstand, Wet | 79 kV | 79 kV | |
| Description | 24 kV | 24 kV | |
| Rated continuous current | 630 A | 1250 A | |
| Rated fault making current | 50 kA | 63 kA | |
| Rated fault breaking current | 20 kA | 25 kA | |
| Cable charging current | 30 A | 35 A | |
| Line charging current | 10 A | 25 A | |
| Rated fault duration time | 4 s | 4 s | |
| Contact resistance, VCB | < 35 µΩ | < 35 µΩ | |
| Contact resistance,ABI | < 65 µΩ | < 65 µΩ | |
| Network frequency | 50/60 Hz | 50/60 Hz | |
| Description | Winding 1 | Winding 2 | Winding 3 |
| Phase CT type 1 | 200/1 | 400/1 | 600/1 |
| Core balance CT (12 kV) | 20/1 | ||
| Description | |||
| Design min mechanical/electrical | 20.000 | 20.000 | |
| Mass (weight) without air break switch - kg (lbs) | 90 (198) | 90 (198) | |
| Mass (weight) with air break switch - kg (lbs) | 120 (264) | 120 (264) | |
| Description | |||
| Ambient temperature C (F) | -45 - +70 | -45 - +70 | |
| Humidity | 100% at 25 C | 100% at 25 C | |
| Bushing type | Epoxy core with silicone surface | ||
| Creep distance to group | 800 mm | 800 mm | |
| Max installation altitude at rated BIL | 3000 M | 3000 M | |
| Description | |||
| Rated operation voltage | 48 VDC | 24 VDC | |
| Rated power | 40 W | 40 W | |
| Design specification | IEC 62271-111 | ||
| Marking specification | IEEE std C37.60 | ||
| Operation sequence, no charge | 25 ms trip - 50 ms close - 25 ms trip | ||