High Reliability

  • Type testing of the MS-E was performed by an independent external testing and certification authority, KEMA, in the Netherlands.
  • MS-E is designed with the benefit of Mitsubishi's vast medium voltage panels production experience of hundreds of thousands of panels over the last almost 70 years.
  • All components, such as current transformers, voltage transformers and multi-function relays are made of the highest quality materials.
  • Heat stress analysis of the switchgear structure has led to a heat-resistant design in which circuit breakers up to 3150 A are self-cooled (i.e. cooling fans not required).
  • The reduced number of parts reduces the chance of failure.

Safety

  • Partitions between compartments and an automatic shutter system (for withdrawable equipment primary junctions) completely isolate live parts.
  • Safe operation and maintenance is ensured with the adoption of comprehensive interlocking mechanisms.
  • In the event of an internal arc fault, the MS-E is designed to withstand the huge pressure and burning effect of the arc. (Relief flaps located on top of the panel open to limit pressure.)
  • Withdrawable equipments are inserted / withdrawn whilst the front panel door is closed so that any arc proof rating is not compromised (in line with IEC 62271-200 requirements).

Easy Installation

  • Installation and testing duration are considerably reduced as the panel is tested and adjusted in the factory and then delivered as a complete unit.

Flexible Design

  • Panels with main circuit and control cable entry from either the top or bottom are available.

Specification

Applied standard IEC 62271-200 (2021 or 2003)*
Rated voltage(kV) 7.2/12/15
Rated frequency(Hz) 50/60
Rated normal main busbar current (A) 630, 1250, 2000, 3000, 3150
Rated insulation level Short-duration power frequency withstand voltage, 1 min. (kV) 20/28/36-1min
Lightning impulse withstand voltage (kV) 60/75/95
Rated short-time withstand current, symmetrical (kA) 25/31.5/40
Rated duration of short-circuit (sec) 1,3
Internal Arc Classification lAC
Accessibility type　 AFL,AFLR
Arc test current (kA) Up to 40
Arc test current duration (sec) Up to 1.0
Dimensions WxDxH [mm] (for 630A outgoing feeder) 800 x 1500 x 2600

(* Some specifications is based on the 2003. For more details, please consult the catalogue.)