Medium Voltage Outdoor Devices
General Information
- Description
Outdoor vacuum circuit-breakers are especially designed for outdoor installation. The design comprises a minimum of moving parts and a simple construction, which guarantees a long electrical and mechanical endurance, offering the same advantages as indoor vacuum circuitbreakers.
Further information you find in the booklet Vacuum Switching Technology and Components for Medium Voltage - Your guide on the right side.
Our Portfolio (5)
Siemens Vacuum Recloser 3AD
- Description
- Technical Data
- Dimensions
- Benefits
Siemens has more than 30 years of experience in vacuum switching technology and is a leader in the field of digital protection technology. The 3AD recloser combines cutting-edge technology with quality engineering experience in relay protection schemes for which Siemens is known.
The Siemens 7SR controller constitutes the brains of the recloser. It comprises indicators and control elements, communication interfaces and a USB port for convenient connection of a laptop computer. Access to the user level menus and data is protected by multi level password authentication. Along with overcurrent time protection (49 preset curves and multiple user configurable curves), it is equipped for earth fault and sensitive earth fault detection. Inrush restraint and load shedding are further protection functions that help prevent nuisance outages.
The Siemens 7SR controller offers a multitude of inputs and outputs for customer use. Additional communication modules for data transfer are available as options. Self-monitoring and measuring functions round out the profile. The Siemens 7SR controller is mounted in a cabinet, which also contains the auxiliary power supply and a battery-backed UPS unit, fuses and a general purpose outlet to power a laptop.
Siemens 3AD distribution reclosers offer dependable protection for temporary faults in overhead line networks and improve the reliability of power supply systems. The Siemens 7SR controller, the core of the system, provides a high level of protection, easy operation and high operating efficiency.
- Ratings through 38 kV
- Factory engineered, pre-installed and wired accessories for ease of on-site installation
- Advanced vacuum interruption technology
- Fully integrated current transformers (CTs) and resistive voltage transformers
- Dual-coil, low-energy magnetic actuator
You will find detailed information in the recent catalog on the right hand side.
| Rated continuous current | 400 A; 630 A; 800 A |
| Rated voltage according to ANSI C37.60 | 12 kV; 15.5 kV; 27 kV; 38 kV |
| Short-circuit breaking current | 12.5 kA; 16kA |
| Lightning impulse withstand voltage | 95 kV to 190 kV |
| Recloser sequence | O–0.2...14400s CO–2...14400s–CO–2...14400s–CO– lock out |
| Opening time | 30 ms |
| Closing time | 60 ms |
| Number of operating cycles | 10,000 |
| Number of short circuit operations | Up to 200; 166 according to ANSI C37.60 duty cycle |
| Number of phases | Three-phase, single phase, single-triple |
| Standards | ANSI C37.60; IEC 62271-111; IEC 60255; IEC-62271-100 |
| Rated voltage (kV) | Interrupting current (kA) (sym) | Lightning impulse withstand voltage (kV) | Operational current (A) | ||
| 400 | 630 | 800 | |||
| 12 | 12.5 | 95 | ■ | ■ | |
| 15.5 | 12.5 | 110 | ■ | ■ | ■ |
| 16 | 110 | ■ | ■ | ||
| 27 | 12.5 | 125 | ■ | ■ | ■ |
| 12.5 | 150 | ■ | ■ | ■ | |
| 16 | 150 | ■ | ■ | ||
| 38 | 12.5 | 170 / optional 190 | ■ | ■ | |
| 16 | 170 / optional 190 | ■ | ■ | ||
| Rated voltage Ur | 15 kV up to 38 kV |
| Control cubicle weight | 66 kg |
| Switch unit weight | 142 - 155 kg |
Sample
Control cubicle
Sample
Three-phase switch unit
Your Benefits:
- High-performance portfolio for up to 16 kA short-circuit breaking current and a rated operating voltage of up to 38 kV
- Uniform design for all applications single, single triple, and three-phase
- Large number of protection, metering, and monitoring functions including loop automation
- Controller based on a protection relay family
- Completely programmable via menu (not only PC)
- Integrated ring-core CT for high accuracy SEF protection in compensated networks