MNS low-voltage drawout switchgear is a modular type assembled in factory using standard modules (FBA), and its technology has reached the international advanced level.
This series of low-voltage drawout switchgear is suitable for use in power plants, substations, petrochemical plants, metallurgical rolling mills, transportation and energy facilities, light industry and textile factories, as well as residential communities, high-rise buildings, and other locations. It is used for energy conversion, distribution, and control of power distribution equipment in power systems with AC 50-60Hz and a rated operating voltage up to 660V AC.
Frame
Assembled from C-shaped profiles
Modular pitch
E=25mm mounting hole spacing
Finish (frames & partitions)
Galvanized passivation treatment
Finish (doors & side panels)
High-voltage electrostatic spraying
Operating Conditions
Condition Requirement
Ambient temperature -5℃ to +40℃ (24h avg. ≤ +35℃)
Relative humidity ≤ 50% @ +40℃; up to 90% @ +20℃ (condensation possible)
Altitude ≤ 2000m
Transport/Storage -25℃ to +55℃ (short-term up to +70℃ for <24h, no permanent damage)
Special conditions Negotiate with manufacturer if limits exceeded
Offshore/nuclear use Separate technical agreement required
Electrical Performance
| Item | Parameter |
| Rated Insulation Voltage | 660V (1000V) |
| Rated Operating Voltage | 380V, 660V |
| Main Busbar Maximum Operating Current | 5000A |
| Main Busbar Rated Withstand Current | 100kA/1s |
| Main Busbar Rated Peak Withstand Current | 220kA/0.1s |
| Distribution Busbar (Vertical Busbar) Maximum Operating Current | 1000A |
| Distribution Busbar (Vertical Busbar) Peak Current | Standard type: 105kA (max.) / 0.1s |
| Reinforced type: 176kA (max.) / 0.1s |
