MS-E / MS-E-2 — air-insulated switchgear 7.2–15 kV (single-tier and double-tier)
MS-E is metal-clad air-insulated switchgear with withdrawable elements for 7.2, 12 and 15 kV per IEC 62271-200. It supplies and protects motors, transformers, capacitor banks and other feeders at power plants, substations, in industry and infrastructure. The double-tier MS-E-2 version for 7.2/12 kV reduces the width of the switchgear by 35 %.
- Rated voltage
- 7.2 / 12 / 15 kV (MS-E-2 double-tier: 7.2 / 12 kV)
- Busbar rated current
- 630–3150 A (up to 4000 A with forced cooling)
- Short-time withstand current
- 25 / 31.5 / 40 kA
- Insulation level
- 60 / 75 / 95 kV (impulse), 20 / 28 / 36 kV (1 min)
Price, availability and lead time on request. We help with analogue selection, customs clearance and delivery.
Description
The company has produced hundreds of thousands of medium-voltage cubicles over almost 70 years. Type tests of the MS-E were carried out in the company's own high-voltage laboratory in Japan and in the independent KEMA laboratory in the Netherlands. With VPR breakers the cubicles are also used in marine installations, where ABS approval exists.
The cubicle is divided into a relay compartment, a withdrawable element compartment, a busbar compartment and a cable compartment. Partitions and automatic shutters completely insulate live parts, and the mechanical and electromechanical interlocks comply with IEC 62271-200. The withdrawable element is moved with the door closed, and the arc resistance of the cubicle is preserved. During an internal arc the pressure is released through flaps in the roof, and where necessary a gas exhaust duct or screen is installed. The thermal design made it possible to use breakers up to 3150 A without fans.
The busbars are rated for 630, 1250, 2000 and 3000/3150 A, with forced cooling up to 4000 A. The short-time withstand current is 25, 31.5 or 40 kA, and the test voltages are 20/28/36 kV power frequency and 60/75/95 kV lightning impulse. The internal arc classification AFL/AFLR reaches 40 kA for 1 s. A 7.2 kV 630 A feeder cubicle has dimensions of 800×1500×2600 mm. The cubicles are equipped with VPR vacuum circuit breakers, and for motor feeders up to 7.2 kV with VMC vacuum contactors.
The double-tier MS-E-2 version places two withdrawable devices one above the other in a single enclosure. The frequently used withdrawable VPR, VMC and VT, the earthing switch and the control devices are moved to the front part, while CTs, zero-sequence CTs, surge arresters and cables are located in the rear. For a switchgear consisting of two incomers, a bus section and two feeder cubicles the width is reduced from 7200 to 4700 mm. The MS-E-2 has class AFLR 40 kA / 1 s, loss of service continuity category LSC2B-PM and a cubicle size of 800×2200×2600 mm.
The cubicles are shipped with the withdrawable elements already installed, so on site it remains to set them on the foundation, connect the busbars and connect the cables. The withdrawable devices and the earthing switch are operated from outside the enclosure, and contactor-based motor starters comply with IEC 60470.
Technical specifications
| Rated voltage | 7.2 / 12 / 15 kV (MS-E-2 double-tier: 7.2 / 12 kV) |
|---|---|
| Busbar rated current | 630–3150 A (up to 4000 A with forced cooling) |
| Short-time withstand current | 25 / 31.5 / 40 kA |
| Insulation level | 60 / 75 / 95 kV (impulse), 20 / 28 / 36 kV (1 min) |
| Internal arc | IAC AFL, AFLR up to 40 kA / 1 s |
| Category | LSC2B-PM |
| 630 A feeder cubicle dimensions | 800×1500×2600 mm (MS-E), 800×2200×2600 mm (MS-E-2) |
| Devices | VPR vacuum circuit breakers, VMC vacuum contactors (up to 7.2 kV) |
| Standard | IEC 62271-200; KEMA tests |
Request a price and lead time
MS-E / MS-E-2 — air-insulated switchgear 7.2–15 kV (single-tier and double-tier). We reply within one business day.
Or email sales@usk.ua or call 044 339-50-20.
Customs codes
| UKTZED (Ukraine) | 8537 20 91 00 |
|---|---|
| HS, 6 digits | 8537 20 |
| CN (EU) | 8537 20 91 |
| HTSUS (USA) | 8537 20 00 00 |
| China customs tariff | 8537 20 90 00 |
Codes are for reference: the final code is determined at declaration for the specific model.
Questions and answers
What internal arc class do the MS-E cubicles have?
IAC classification AFL/AFLR up to 40 kA for 1 s. The pressure is released through flaps in the roof.
By how much does the double-tier MS-E-2 reduce the width of the switchgear?
For a scheme of two incomers, a bus section and two feeder cubicles the width is reduced from 7200 to 4700 mm, that is, by 35 %.
Which devices are installed in the cubicles?
VPR vacuum circuit breakers, and for motor feeders up to 7.2 kV VMC vacuum contactors. Breakers up to 3150 A operate without fans.
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