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MNS-G type low-voltage switchgear

Category:

Low voltage complete switchgear

Email:

cy83207718@163.com

General description:

MNS low-voltage switchgear is suitable for various power supply and distribution needs and can be widely used in power plants, substations, industrial and mining enterprises, buildings, hotels, municipal construction, and other low-voltage power distribution systems.

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Product Description

MNS-G is a low-voltage switchgear assembly upgraded based on ABB's MNS technology in Sweden, combined with the needs of China's power grid and industry. It is suitable for 50/60 Hz, rated operating voltage 380/660 V, and distribution and motor control systems with a maximum horizontal busbar of 6300 A. It is widely used in power plants, substations, industrial and mining enterprises, data centers, commercial buildings, and municipal projects.

1. Technical Parameters
| Item | Range |
|---|---|
| Rated Operating Voltage | 380 V / 400 V / 660 V |
| Rated Insulation Voltage | 1000 V |
| Rated Current of Horizontal Busbar | 630 A – 6300 A |
| Rated Current of Vertical Busbar | 1000 A – 2000 A |
| Rated Short-Time Withstand Current Icw | 50 / 65 / 80 / 100 kA / 1 s |
| Rated Peak Withstand Current Ipk | 105 / 143 / 176 / 220 kA |
| Rated Impulse Withstand Voltage | 8 kV / 12 kV |
| Frequency | 50 / 60 Hz |
| Protection Level | IP30 / IP40 / IP54 |
| Installation Type | Indoor floor-standing, back-to-back or wall-mounted |

2. Structural Features
• Modular C-section frame, E = 25 mm standard hole spacing, fully assembled without welding, excellent cabinet strength and grounding continuity;
• Drawer units in five specifications: 1/4, 1/2, 1, 2, and 3. A single cabinet can accommodate up to 36 circuits, supporting interchangeability and maintenance without power interruption;
• The drawer drive mechanism has a three-position mechanical interlock: connect-test-separate, operating force ≤ 25 N, plugging and unplugging life ≥ 1000 times;
• Rear-mounted horizontal busbars, top/bottom cable compartments allow for free entry and exit of wires from the top and bottom, and the double-sided maintenance space only requires 600 mm;
• Internal partitions and drawer side panels are made of high-strength flame-retardant engineering plastics, which are resistant to high temperatures of 960 ℃ and effectively inhibit arc propagation.

3. Functional Units
• Incoming cabinet: ACB drawer-type or fixed-type, intelligent trip unit with L-S-I-G four-stage protection;
• Feeder cabinet: MCCB drawer unit 63 A – 630 A, can be equipped with electronic trip or thermal magnetic trip;
• Motor control cabinet: direct start, reversible, soft start, frequency conversion drawer, power up to 250 kW;
• Reactive power compensation cabinet: static or thyristor switching, capacity 50 – 400 kvar, THDi ≤ 5 %;
• Dual power supply switching cabinet: PC level ATS 400 – 3200 A, switching time ≤ 50 ms.

4. Intelligent Expansion
• All series reserve Modbus-RTU / PROFIBUS / Ethernet interfaces, which can be connected to SCADA/DCS;
• Optional wireless temperature measurement, arc protection, and energy management modules to achieve predictive maintenance;
• Meets the requirements of GB/T 7251.12-2013, IEC 60439-1, IEC 61439-1/2 full-type test (TTA).

5. Typical Applications
National Grid urban distribution network capacity expansion, subway traction stations, data center UPS power distribution, petrochemical 220 kV substation low-voltage substation, and main distribution rooms of large commercial complexes, etc.

6. Ordering Information
Please provide: main busbar current and short-circuit capacity, number and type of drawer circuits, input/output method, protection level, color, and intelligent interface requirements.

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