Surge arrester MWD
Silicone-housed surge arrester of IEC class station low (SL) for AC systems up to 52 kV for indoor use
MWD is a shedless surge arrester with metal-oxide (MO) resistors without spark gaps directly molded in silicone housing, grey color, designed and tested according to IEC 60099-4; and it fulfills the requirement of ANSI/IEEE C62.11. Fire and smoke behavior tested and classified according to EN 45545-2.
It is used for secure protection of medium voltage systems against overvoltages from atmospheric discharges and switching conditions. The product is suitable for indoor installation only.
Applications
- Medium-voltage dry type transformer
- Air-insulated medium-voltage switchgear and panel
- Medium size generator
- Medium-voltage cable and cable termination
- Medium-voltage motor
- Other medium-voltage distribution equipment
Why Hitachi Energy?
- Over 100 years of experience in overvoltage protection and more than 30 years with silicone insulation
- Local and global Hitachi Energy application support
- Proven safe short-circuit current design
- Design life of more than 30 years
- Own production of metal-oxide (MO) resistors
- Excellent protection level with low residual voltage
- Maintenance free
Brief performance data
| MWD | ||
|---|---|---|
| Maximum system voltage (Us) | kV | 52 |
| Continuous voltage through arrester (Uc) | kVrms | 4-44 |
| Rated voltage of arrester (Ur) | kVrms | 5-55 |
| Nominal discharge current (In) | kApeak | 10 |
| Thermal energy rating (Wth) | kJ/kV (Ur) | 5.0 |
For more details see the data sheet in downloads below.
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