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China MNS Low-Voltage Withdrawable Switchgear - Reliable Suppliers & Factory Assembled 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 Protection |
| Complies with IEC 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 IP54 Level of Protection, consultation with the manufacturer is required.) |
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 (H) | Width (B) | Depth | Notes | ||
|---|---|---|---|---|---|
| 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 (H) | Width | Depth | Notes | ||||
|---|---|---|---|---|---|---|---|
| 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 (FAQ)
What are the environmental temperature limits for operating this switchgear?
The surrounding air temperature should range from a minimum of -5℃ to a maximum of +40℃, with the average temperature over a 24-hour period not exceeding +35℃.
What is the maximum installation altitude allowed?
The standard installation altitude for this device should not exceed 2,000 meters above sea level.
What materials and treatments are used for the cabinet structure?
The cabinet structure consists of C-shaped steel profiles with E=25mm modular mounting holes. All internal frames and partitions undergo galvanized phosphating, while the doors and side panels feature a high-voltage electrostatic sprayed finish.
What ingress protection (IP) ratings does the cabinet support?
It complies with IEC 529 and DIN 40050 standards. It is available in IP30 (protection against >2.5mm solids), IP40 (protection against >1.0mm solids), and IP54 (dust and splash protection). Note that ordering IP54 protection requires direct consultation with the manufacturer.
What is the difference between PC and MCC switch cabinets?
Power Distribution Center (PC) cabinets use circuit breakers like Emax, MT, and ME for primary distribution. Motor Control Center (MCC) cabinets utilize modular drawer configurations with molded case circuit breakers or rotary load switches for motor control and automatic power factor compensation.
Can this equipment be used in offshore or nuclear installations?
Yes, but application on offshore oil drilling platforms or within nuclear power plants requires a separate, dedicated technical agreement to be signed between the user and the manufacturer.