BRDA
The BRDA madium voltage, double bus-bar switchgear system is designed for primary distribution of AC three-phase electric energy with a rated frequency of 50Hz and rated voltage up to 17,5 kV.
Thanks to the double bus-bar solution, the BRDA switchgear may be used in conditions, where reliability and flexibility of switching operations between two different power sources secure the continuity of power supply. Thios is very essential for objects of critical destination, production plants in processing industry and in electrical power distribution system of weak networks.
The BRDA system of withdrawable MV switchgear units has received many awards and distinctions:
- The MTP Golden Medal during the Expopower exhibition;
- Promotional Emblem TERAZ POLSKA;
- the Golden Medal of the President of SEP (the Polish Association of Electrical Engineers) during the Expopower exhibition as a “Special Distinction of Merit for electrical products developed by Polish electricians and engineers”.
The advantages of the BRDA withdrawable switchgear system includes:
- Modern design solutions
- High internal arc discharge withstand strength
- Arc discharge protection
- Diverse configurations of switchgear panel systems
- High operating safety
- High operating reliability
- High corrosion resistance
- Easy servicing and maintenance
Application and features of the system
The BRDA madium voltage, metal-clad double bus-bar switchgear system is designed for primary distribution of AC three-phase electric energy with a rated frequency of 50Hz and rated voltage up to 17,5 kV in electric power distributiion networks of public utilities and industrial power distribution networks.
The BRDA switchgear unit applications include:
- Power generating plants
- Power engineering facilities
- Industrial settings
Thanks to the double bus-bar solution, the BRDA switchgear may be used in conditions, where reliability and flexibility of switching operations between two different power sources secure the continuity of power supply. Thios is very essential for objects of critical destination, production plants in processing industry and in electrical power distribution system of weak networks.
The BRDA switchgear units were tested at the Institute of Electrical Engineering (IEL) in Warsaw and certified for compliance to prove the ratings and approve for applications in power engineering facilities, power generating plants, industrial settings, and other establishments which generate, transmit, or consume electricity.
The BRDA MV switchgear units are:
- switchgears have two independent systems of bus-bar
- metal-clad with two separate bus-bar compartments
- indoor
- air insulated
- compartments separated with metallic partitions
- withdrawable circuit breaker (can be transported outside the cubicle on a separate trolley
- internal arc tested
- equipped with innovative equipment for switching, measurement and control functions
Technical data and certificates
Technical data of medium voltage switchgear system BRDA
| Rated insulation voltage | kV | 12 | 17,5 | |
|---|---|---|---|---|
| Rated lightning impulse withstand voltage(1,2/50μs) | kV | 75/85 | 95/110 | |
| Rated power frequency withstand voltage | kV | 28/32 42/48* | 38/45 | |
| Rated frequency | Hz | 50 | ||
| Rated continuous current of busbars | A | up to 2500 | up to 4000 | up to 1250 |
| Rated short time withstand current | kA | 31,5/3s | 72/1s | 25/3s |
| Rated peak withstand current | kA | 80 | 180 | 63 |
| Withstand for internal arcing fault | kA | 31,5/1s | 72/1s | 25/1s |
| Degree of protection | IP 4X / IP 41 | |||
| IAC classification (class of resistance to internal arc) | AFLR | |||
| PM/PI classification (class of partitions) | PM | |||
| LSC classification (class of compartment accessibility) | LSC2B | |||
| Busbar system | double | |||
| Weight of a single switchgear cubicle | kg | 950 - 3500 | ||
| Overall dimensions (width)** | mm | 600 - 1200 | ||
| Overall dimensions (depth)** | mm | 1725 - 2350 | ||
| Overall dimensions (height)** | mm | 2750 - 3500 | ||
* - according to ГOCT
** - without external protectors, covers, doors
The BRDA switchgear units with the devices installed are fit for operation in typical conditions within the following indoor environmental limits:
| Installation altitude above sea level | up to 1000 m | |
|---|---|---|
| Ambient temperature: | peak short-time | +40°C |
| maximum daily average | +35°C | |
| maximum yearly average | +20°C | |
| minimum sustained | -5°C | |
| Air relative humidity at 313 K (+40°C): | during the start up | max. 80% |
| during standstill or operation | max. 95% | |
Certificates
The BRDA switchgear units were tested at the Institute of Electrical Engineering (IEL) in Warsaw and certified for compliance to prove the ratings and approve for applications in power engineering facilities, power generating plants, industrial settings, and other establishments which generate, transmit, or consume electricity.
Download
Latest catalogue of BRDA MV switchgear system: