MV-CONNEX – plug-in bushings, sockets and insulators for MV transformers, switchgear and motors up to 52 kV
MV-CONNEX equipment-side components make medium-voltage transformers, switchgear and motors up to 52 kV plug-in. Separable MV-CONNEX connectors, surge arresters and blanking plugs are fitted onto them. The range includes angled bushings, sockets, insulators, busbar connections and the CMA motor connector.
- Highest operating voltage
- 24 / 36 / 42 / 52 kV
- Angled transformer bushings
- size 0 – 24 kV, 250 A; size 1 – 36 kV, 630 A
- Multi-contact angled bushings
- 2 or 4 cables, up to 52 kV, up to 2200 A (plug-in) / 3150 A (clamp connection)
- Sockets
- 42 kV, 800 A (round); 52 kV, 1250 A (hexagonal)
Price, availability and lead time on request. We help with analogue selection, customs clearance and delivery.
Description
On network transformers, straight transformer sockets, angled adapters and angled bushings are installed on the MV side instead of DIN porcelain bushings. The angled bushing of size 0 is rated for 24 kV and 250 A, size 1 for 36 kV and 630 A. After installation the bushing can be rotated through 260°, and the earthed metal housing fully protects personnel against electric shock. Mounting follows DIN 42538 (flange A) on a cover up to 10 mm thick.
Two-contact and four-contact angled bushings up to 52 kV in an aluminium housing are intended for high-power transformers. They split the current between two or four cables with connectors of size 2 or 3. Inside the transformer, a plug-in connection with a rated current of up to 2200 A or a clamp connection up to 3150 A is permitted. These bushings are suitable for marine use and have passed the cold shock test to VDE 0441. A surge arrester can be fitted in place of a cable in a free position, and unused sockets are closed with blanking plugs. Small animals and birds can no longer cause a short circuit.
Angled bushings and sockets are available for switchgear, circuit breakers, motors and capacitors. Round sockets are rated up to 42 kV and 800 A, hexagonal ones for GIS and transformers up to 52 kV and 1250 A. Versions with sulphur hexafluoride gas or oil insulation and with capacitive voltage tap of 8.5 ± 1.5 or 14.5 ± 1.5 pF are available. MV-CONNEX insulators for 24 and 36 kV make it possible to equip air-insulated panels with touch-protected cable connections. An outdoor bushing for 24 kV and 800 A with a bending load of 5 kN serves as the transition from an overhead line to a metal-enclosed cable termination on pole-mounted substations. The FLINK busbar system for 24 kV and 630 A and the size 2 connection for 42 kV and 1250 A join the busbars of gas-insulated switchgear without opening the gas compartment.
The CMA motor connector of size 1 for 13.8 kV, and in the explosion-proof version for 11 kV, is installed in place of the terminal box of a high-voltage motor. It is metal-enclosed, touch-protected, has degree of protection IP66 and shortens motor start-up and replacement time. The CMS neutral connector makes it possible to swap the connection side and the star-point side.
Technical specifications
| Highest operating voltage | 24 / 36 / 42 / 52 kV |
|---|---|
| Angled transformer bushings | size 0 – 24 kV, 250 A; size 1 – 36 kV, 630 A |
| Multi-contact angled bushings | 2 or 4 cables, up to 52 kV, up to 2200 A (plug-in) / 3150 A (clamp connection) |
| Sockets | 42 kV, 800 A (round); 52 kV, 1250 A (hexagonal) |
| Capacitive tap of sockets | 8.5 ± 1.5 pF; 14.5 ± 1.5 pF |
| Outdoor bushing for pole-mounted substations | 24 kV, 800 A, 5 kN |
| FLINK busbar connection | 24 kV, 630 A |
| CMA motor connector | 13.8 kV; 11 kV Ex; IP66 |
| Mounting on the transformer | DIN 42538 |
Request a price and lead time
MV-CONNEX – plug-in bushings, sockets and insulators for MV transformers, switchgear and motors up to 52 kV. We reply within one business day.
Or email sales@usk.ua or call 044 339-50-20.
Customs codes
| UKTZED (Ukraine) | 8535 90 00 00 |
|---|---|
| HS, 6 digits | 8535 90 |
| CN (EU) | 8535 90 00 |
| HTSUS (USA) | 8535 90 80 60 |
| China customs tariff | 8535 90 00 90 |
Codes are for reference: the final code is determined at declaration for the specific model.
Questions and answers
Which angled bushings are suitable for network transformers?
The angled bushing of size 0 is rated for 24 kV and 250 A, size 1 for 36 kV and 630 A. Mounting follows DIN 42538 on a cover up to 10 mm thick.
What solution exists for transformers with several cables per phase?
Two-contact and four-contact angled bushings up to 52 kV split the current between two or four cables. Inside the transformer, a plug-in connection up to 2200 A or a clamp connection up to 3150 A is permitted.
Can a high-voltage motor be connected through MV-CONNEX?
Yes, the CMA motor connector for 13.8 kV is installed in place of the terminal box. An explosion-proof version for 11 kV is available, degree of protection IP66.
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