MNS withdrawable switchgear

The MNS low-voltage withdrawable switchgear is a newly developed product. This product features a compact design, strong structural versatility, flexible assembly, and standard modular design, making it a safe, economical, reasonable, and reliable new type of low-voltage withdrawable switchgear.

This product has high breaking capacity, good dynamic and thermal stability, flexible electrical scheme, and high protection level. This device conforms to IEC439, VDE660 Part 5, and the national standard GB7251-87 "Low-voltage complete switchgear", and the professional standard ZBK36001-89 "Low-voltage withdrawable complete switchgear".

Compact Design: Accommodates more functional units in a smaller space.

Strong Structural Versatility and Flexible Assembly: C-shaped profiles with a 25mm module can meet the needs of various structural types, protection levels, and usage environments.

Standard Modular Design: Can be assembled into standard units for protection, operation, conversion, control, adjustment, measurement, and indication. Users can select and assemble them as needed. With over 200 assembly components, different cabinet structures and drawer units can be assembled.

Safety: Extensive use of high-strength flame-retardant engineering plastic components effectively enhances safety protection performance.

High Technical Performance: Main parameters reach the contemporary international technical level.

Space Saving: High degree of integration, greatly reducing the space required for storage and transportation of components.

Easy Assembly: No special or complex tools are required.

Wide Applicability: Suitable for AC 50-60Hz, rated operating voltage of 660V and below power supply systems, used for the control of power generation, power transmission, power distribution, power conversion, and power consumption equipment.

Compliant with International and Domestic Standards: Conforms to IEC439, VDE660 Part 5, GB7251 "Low-voltage complete switchgear", and ZBK36001 "Low-voltage withdrawable complete switchgear" professional standards.

1. Ambient air temperature not higher than +55℃, not lower than -15℃, and the average temperature within 24 hours not higher than +35℃.

2. Atmospheric conditions: Clean air, relative humidity not exceeding 50% at a maximum temperature of +40℃, higher relative humidity is allowed at lower temperatures, e.g., 90% at +20℃, but the possibility of occasional moderate condensation due to temperature changes should be considered.

3. Altitude not exceeding 2000m.

4. This device is suitable for transportation and storage processes within the temperature range of -25℃ to +55℃, reaching +70℃ for short periods. Under these extreme temperatures, the device should not suffer any irreversible damage and should function normally under normal conditions.

5. If the above operating conditions cannot be met, the user and manufacturer should negotiate a solution.

Electrical Performance

1. Rated insulation voltage: 690V

2. Rated operating voltage: 380V, 660V

3. Maximum operating current of main busbar: 5500A (IP00), 4700A (IP30)

4. Short-time (1S) withstand current of main busbar: 100KA (RMS)

5. Short-time peak current of main busbar: 250KA (maximum); Document number: HQ-SMS-D0014/9

6. Maximum operating current of distribution busbar (vertical busbar): 1000A

7. Short-time peak current of distribution busbar (vertical busbar): Standard value: 90KA (maximum); Enhanced type: 130KA (maximum)

Protection Level

Complies with IEC529 and DIN40050 standards

IP30 protection against solids greater than φ2.5

IP40 protection against solids greater than φ1.0

IP54 protection against dust and spray from any direction (consult the factory when ordering IP54 protection level)

This product is a combination switchgear that has undergone type testing by a nationally designated testing institution and complies with IEC493-1:1992 and GB7251.1-1997 standards.

MNS low-voltage withdrawable switchgear is suitable for AC 50(60)Hz, rated insulation voltage and operating voltage of 380(400) and 660V, rated current of 5000A and below three-phase five-wire power supply systems. It can be used in power plants, substations, industrial and mining enterprises, buildings, hotels, airports, docks, and communication centers such as broadcasting and television, for the control of power generation, transmission and distribution, power conversion, and power consumption equipment.