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China MNS Low-voltage Withdrawable Switchgear - Reliable Suppliers and Factory for Electrical Distribution Solutions
Model and Definitions
Normal Use Environment Conditions
The surrounding air temperature should not exceed +40℃ and not be lower than -5℃, with an average temperature within 24 hours not exceeding +35℃.
Atmospheric conditions: The air should be clean, with Relative Humidity not exceeding 50% at the maximum temperature of +40℃. Higher Relative Humidity is allowed at lower temperatures, such as 90% at +20℃; however, temperature changes should be considered, as condensation may occur occasionally.
The altitude should not exceed 2,000 meters.
This device is suitable for transportation and storage processes within the temperature range of -25℃ to +55℃. For a short period (not exceeding 24 hours), it can reach +70℃. At these extreme temperatures, the device should not suffer any irreparable damage and should operate normally under standard conditions.
If the above application conditions cannot be met, the user and the manufacturer should negotiate a solution.
When this device is used on offshore oil drilling platforms and nuclear power plants, a separate technical agreement should be signed.
Cabinet Structure
The basic structure of the switchgear cabinet is composed of C-shaped profiles assembled together. The C-shaped profiles are made of steel plates bent with E=25mm as the modular mounting hole. All cabinet frames and internal partitions undergo galvanized phosphating treatment. Surrounding door panels and side panels are finished with high-voltage electrostatic spraying.
Basic Technical Parameters
| Electric Performance | ||
| Rated Insulation Voltage | 660V(1000)V | |
| Rated Working Voltage | 380V、660V | |
| Maximum Working Current of Main Busbar | 5000A | |
| Rated Withstand Current of Main Busbar | 100kA/1s | |
| Rated Peak Withstand Current of Main Busbar | 220kA/1s | |
| Maximum Working Current of Distribution Busbar (Vertical Busbar) | 1000A | |
| Peak Current of Distribution Busbar(Vertical Busbar) | ||
| Standard | 105kA(Max)/0.1s | |
| Reinforced | 176kA(Max)/0.1s | |
| Level of Protecti |
| Complies with lEC 529 and DIN 40050 standards: |
| IP30: Provides protection against solid objects larger than ф2.5mm. |
| IP40: Provides protection against solid objects larger than ф1.0mm. |
| IP54: Offers protection against dust and splashes from any direction |
| (Note: When ordering lP54 Level of Protection,consultation with the manufacturer is reguired.) |
Types of Switch Cabinet
◇ Power Distribution Center Cabinet (PC): Can utilize circuit breakers from series such as Emax, MT, 3WN, AH, and ME.
◇ Motor Control Center Cabinet (MCC): Assembled from drawers of various sizes, with the main switch for each circuit using high-breaking capacity molded case circuit breakers or rotary load switches with fuses. It includes a power factor automatic compensation cabinet (equipped with manual, automatic, and remote power factor compensation devices).
Cabinet Schematic Diagram
A Power Distribution PC Cabinet
| Height | Width | Depth | Notes | ||
| H | B | T | T1 | T2 | |
| 2200 | 400 | 1000 | 800 | 200 | Main Busbar Switching |
| 2200 | 400 | 1000 | 800 | 200 | F₁s-1250-2000 ME630-1605 |
| 2200 | 600 | 1000 | 800 | 200 | F₂s-21500 |
| 2200 | 800 | 1000 | 800 | 200 | F₄s-3200 ME2000-3200 |
| 2200 | 1000 | 1000 | 800 | 200 | F₅s-4000 ME3205 |
| 2200 | 1200 | 1000 | 800 | 200 | ME4005 |
B Motor Control Central (MCC) Cabinet
| Height | Width | Depth | Notes | ||||
| H | B | B1 | B2 | T | T1 | T2 | |
| 2000 | 1000 | 600 | 400 | 600 | 400 | 200 | One-side Operation |
| 2000 | 1000 | 600 | 400 | 1000 | 400 | 200 | Double-sided Operation |
Schematic Diagram of Compound Mode
Installation Schematic Diagram
Frequently Asked Questions
What are the ambient temperature requirements for this switch cabinet?
The surrounding air temperature should remain between -5℃ and +40℃. Additionally, the average temperature over any 24-hour period must not exceed +35℃.
What is the maximum operating altitude for the equipment?
The device is designed to operate normally at an altitude that does not exceed 2,000 meters.
What levels of protection (IP ratings) are supported by the cabinet?
The cabinet complies with IEC 529 and DIN 40050 standards, offering IP30 (protection against solid objects >ф2.5mm), IP40 (protection against solid objects >ф1.0mm), and IP54 (protection against dust and splashes). Note that IP54 requires prior consultation with the manufacturer.
Can this switchgear cabinet be used in special environments like offshore platforms or nuclear plants?
Yes, the device can be used on offshore oil drilling platforms and in nuclear power plants, but a separate technical agreement must be signed beforehand.
What is the structural composition of the cabinet frame?
The basic structure is built from assembled C-shaped profiles made of steel plates bent with E=25mm modular mounting holes. The frames and internal partitions are galvanized phosphated, while the door and side panels feature a high-voltage electrostatic sprayed finish.
What are the primary differences between the PC and MCC switch cabinets?
The Power Distribution Center (PC) Cabinet uses circuit breakers like Emax, MT, 3WN, AH, and ME. The Motor Control Center (MCC) Cabinet is assembled from various drawer sizes, utilizes high-breaking capacity molded case circuit breakers or rotary load switches with fuses, and includes automatic power factor compensation.