1E-Class MNS Low-Voltage Switchgear
The 1E-class MNS-type low-voltage withdrawable switchgear is a novel, complete low-voltage switchgear assembly developed by Tian’an Electric based on the technology of ABB’s MNS switchgear, with careful assimilation and adaptation to the environmental conditions of nuclear power plants, and fully compliant with the 1E-class requirements for such facilities.
Category:
Low-Voltage Switchgear
Keywords:
1E-Class MNS Low-Voltage Switchgear
The 1E-class MNS-type low-voltage withdrawable switchgear is a novel, complete low-voltage switchgear assembly developed by Tian’an Electric based on the technology of ABB’s MNS switchgear, with careful assimilation and adaptation to the environmental conditions of nuclear power plants, and fully compliant with the 1E-class requirements for such facilities. The product comprehensively meets the requirements of standards including IEEE 323, IEEE 344, IEC 60439, and GB 7251.1, and is used for 1E-class low-voltage power distribution, as well as for the power supply and control of 1E-class low-voltage loads and other critical systems in nuclear power plants. Under both normal and abnormal operating conditions, it performs functions such as the collection and distribution of 380 V/220 V electrical energy, system monitoring and protection, and the control and protection of electrical installations and equipment. Moreover, it ensures the integrity of these functions under design-basis event conditions throughout the facility’s safe service life, thereby fulfilling essential safety functions.
1) Certified by the national CCC certification
2) Passing the Class 1E (nuclear-grade) seismic qualification test
3) Passing the Class 1E (nuclear-grade) aging-resistant test
4) Through electromagnetic compatibility testing
5) A three-phase integrated multi-pole plug-in connector is used as the primary connection device, with a maximum current-carrying capacity of 630 A.
6) The 8E/4 drawer can accommodate molded-case circuit breakers.
7) Compact structure that accommodates a large number of functional units within a small footprint; a single cabinet can house up to 36 8E/4 drawer units.
8) Safe and reliable, with isolation between zones and between functional units, effectively enhancing safety and protection performance.
Serial Number | Project | Unit | Technical Specifications |
1 | Rated Insulation Voltage | kilovolt | 660 |
2 | Rated operating voltage | kilovolt | 380 |
3 | Rated frequency | Hertz | 50 |
4 | Rated current | A | 2500 |
5 | Rated short-time withstand current (RMS value)/time | kA/s | 65/1 |
6 | Rated Peak Withstand Current | kA | 143 |
7 | Protection Level | IP | 31/40 |
8 | Cabinet height | mm | 2200 |
9 | Cabinet width | mm | 600, 800, 1000 |
10 | Cabinet depth | mm | 800, 1000 |
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