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China MNS Low Voltage Switchgear Suppliers - Reliable Factory Solutions for Power Distribution Systems
Advantages
The electrical structure of the MNS switchgear is designed with a modular concept, and the switchgear frame structure offers high flexibility. Various electrical components can be installed inside the switchgear to meet different application requirements and to achieve the corresponding protection levels for different working environments. It can be selected as a new type of low-voltage switchgear by users.
Compared with traditional products, the MNS cabinet has the following advantages:
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Standardized and modular design for the entire series.
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The switchgear can be designed with different protection levels according to the working and environmental requirements.
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Different types of functional components can be freely installed in the same switchgear, such as fixed components and withdrawable components.
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Compact structure that saves space inside the switchgear.
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The distribution circuit layout is economical and the installation density is high.
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The switchgear can be arranged back-to-back.
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Equipment updates and improvements are convenient.
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The equipment has high reliability and continuity in operation.
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Fully guarantee the personal safety of operators.
Standards
- doc IEC61439-2 "Low voltage switchgear and control equipment"
- doc GBIT7251.12 "Low Voltage Switchgear and Control Equipment"
- doc GBIT24274 "Low voltage withdrawable switchgear and control equipment"
Type and meaning
Service conditions
a. Installation position:
MNS switchgear is a complete electrical equipment installed indoors. When the protection level reaches IP54, it can operate under other working conditions.
b. Ambient temperature and relative humidity:
The upper limit of ambient temperature is 40 ℃, and the average temperature within 24 hours shall not higher than 35 ℃; The lower limit of ambient temperature is -5 ℃. When the equipment is used under conditions higher than the above ambient temperature, it should be operated at reduced capacity.
The air is clean, and the relative humidity should not exceed 50% at 40 ℃. Higher relative humidity is allowed at lower temperatures (e.g. 90% at 20 ℃). In cases where condensation may occur, ventilation or heating measures can be used in the switchgear to prevent condensation.
c. Altitude:
The altitude of the location where the switchgear is used shall not exceed 2000m. If the switchgear is installed in an area above an altitude of 2000m, the equipment should be correspondingly reduced in capacity for operation.
Main technical parameters
| Electrical parameters | Rated voltage | Rated insulation voltage Ui | AC 690V / 1000V | |
| Rated working voltage Ue | AC 400V / 690V | |||
| Rated impulse withstand voltage Uimp | 8kV / 12kV | |||
| 1-minute power frequency withstand voltage | 2.5kV / 3.5kV | |||
| Rated current | Main busbar | Rated current le | To 6300A | |
| Rated peak withstand current lpk | To 220kA | |||
| Rated short-time withstand current lcw | To 100kA | |||
| Vertical busbar1 | Rated current le | To 1250A | ||
| Rated peak withstand current lpk | To 143kA | |||
| Rated short-time withstand current lcw | To 65kA | |||
| Rated frequency | 50Hz / 60Hz | |||
| Structural features | Dimensions | Height (mm) | 2200 | |
| Width (mm) | 400, 600, 800, 1000, 1200 | |||
| Depth(mm) | 600, 800, 1000, 1200 | |||
| Modulus | E=25mm | |||
| Internal separation form | To 4b | |||
| Protection level | IP30, IP40, IP42, IP54 | |||
Note 1: Vertical busbar specifically refers to the distribution busbar of drawer switchgear, the same applies below.
Frequently Asked Questions (FAQ)
What are the primary design advantages of MNS switchgear?
MNS switchgear features a standardized and modular design that offers high flexibility. It supports the installation of various electrical components (both fixed and withdrawable) in the same cabinet, saves space, and ensures high reliability and operator safety.
Which standards does the MNS switchgear comply with?
The equipment is manufactured and tested in compliance with IEC61439-2 ("Low voltage switchgear and control equipment"), GBIT7251.12 ("Low Voltage Switchgear and Control Equipment"), and GBIT24274 ("Low voltage withdrawable switchgear and control equipment").
What are the standard ambient temperature limits for MNS switchgear?
The ambient temperature should be within the range of -5 ℃ to 40 ℃, and the average temperature over a 24-hour period must not exceed 35 ℃. If the temperature exceeds these limits, the equipment must operate at a reduced capacity.
Can MNS switchgear be installed in locations above 2000 meters in altitude?
Yes, but if the installation altitude exceeds 2000m, the switchgear should be operated at a correspondingly reduced capacity to ensure safety and performance.
What protection levels are available for the MNS switchgear?
Depending on the working and environmental requirements, MNS switchgear can be designed with protection levels of IP30, IP40, IP42, or IP54. When configured to IP54, it can operate under more demanding conditions.
What are the maximum rated insulation voltage and current capacity?
The rated insulation voltage (Ui) is AC 690V / 1000V, the main busbar rated current (le) is up to 6300A, and the vertical busbar rated current is up to 1250A.