3.3-40.5 kV
11kV Switchgear
Product parameters:
- Indoor medium voltage distribution switchgear
- Rated voltage: 3.3kV, 6kV, 10kV, 11kV, 12.5kV, 13.8kV
- Current up to: 4000A
- Floor standing
- Standard: IEC, ANSI, GB
- UN-P28
General
This medium voltage switchgear is used in 3.3kV, 6kV, 10kV, 11kV, 12.5kV and13.8kV power system, as control distribution unit.
It can be floor standing or wall mounted. by using withdrawable ACB up to 4000A.
Compact structure with degree of protection cabinets, up to IP 4X.
High quality aluminium zinc-coated sheet, make cabinet strong and lighter.
Complatible with VS1, VD4, ZN12, 3AH，VB2， VC7 and VEP
UN-P28 is medium voltage switchgear with a metal enclosure, suitable for indoor installations. Metal clad and seperate the compartments from each other’s. Their live parts are air-insulated. Since the switchgear is highly modular type, this make simple selection of components required by any application. The functional units of the switchgear are guaranteed arc proof in accordance with the IEC 62271-200 Standards. All the installation, operation and maintenance operations can be carried out from the front of the switchgear. The vacuum circuit breaker and earthing switches are operated from the front with the door closed. The switchgear can be back to wall installed.
Standard
All UNISUN transformers are in conformity with IEC standards, Transformers in conformity with specific country standards can also be supplied. (IEEE, GB)
Technical date
Rated voltage | kV | 7.2 | 11 | 17.5 | 22 | 33 |
Rated insulation voltage | kV | 7.2 | 12 | 17.5 | 24 | 24 |
Rated power frequency withstand voltage | kV 1min | 20 | 28 | 38 | 50 | 70 |
Rated lightning impulse withstand voltage | kV | 60 | 75 | 95 | 125 | 170 |
Rated frequency | Hz | 50/60 | 50/60 | 50/60 | 50/60 | 50/60 |
Rated short time withstand current | kA 3 s | …50 | …50 | …50 | …31.5 | …31.5 |
Peak current | kA | …125 | …125 | …125 | …80 | …80 |
Internal arc withstand current | kA 1 s | …50 | …50 | …50 | …31.5 | …31.5 |
Main busbar rated current | A | …4,000 | …4,000 | …4,000 | …3,150 | …3,150 |
Circuit-breaker rated current | A | 630 | 630 | 630 | 630 | 630 |
1,250 | 1,250 | 1,250 | 1,250 | 1,250 | ||
1,600 | 1,600 | 1,600 | 1,600 | 1,600 | ||
2,000 | 2,000 | 2,000 | 2,000 | 2,000 | ||
2,500 | 2,500 | 2,500 | 2,300 | 2,300 | ||
3,150 | 3,150 | 3,150 | 2,500 | 2,500 |
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Our Production
The products are designed in strict accordance with IEC or ANSI standards, and the manufacturing steps meet the technological requirements
Wiring design
Standardized circuit design, high purity copper bar is used for primary circuit, and the design meets the current requirements of the project. Standard copper wire is available for the secondary circuit, and the circuit design is optimized according to the requirements of the project.
Production testing
Comprehensive production inspection, in accordance with the premise of electrical performance, to ensure that each electrical component can working efficiently.
