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China XL-21 AC Low Voltage Power Distribution Cabinet - Reliable Suppliers and Factory Solutions
Model and Definitions
Use Environment
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Ambient temperature: -5℃ ~+40℃, 24h average temperature inside does not exceed +35℃.
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Altitude: no more than 2000m.
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Relative Humidity: No more than 50% at +40℃; up to 90% at +20℃. Moderate condensation is permitted.
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Installation inclination: Not exceeding 5° to the vertical plane.
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Installation site: Free from severe vibration, impact, and corrosion. (Consult for special conditions).
Product Technical Features
Electrical performance complies with GB 7251.1 and IEC60439-1 standards.
Feeder switch: New molded case circuit breaker with high breaking rate and short arcing. Includes overload and short circuit protection.
Motor circuit: Integrated overload, short circuit, undervoltage, and phase loss protection.
Auxiliary circuit: Supports local/remote control and automatic switching functions.
Technical Specifications
| No. | Items | Units | Data |
| 1 | Main Circuit Nominal Voltage | V | AC: 380 |
| 2 | Auxiliary Circuit Nominal Voltage | V | AC: 220, 380 |
| 3 | Rated Frequency | Hz | 50 |
| 4 | Rated Insulation Voltage | V | 660 |
| 5 | Rated Currency | A | ≤800A |
Installation, Acceptance and Commissioning
Upon arrival, check packaging integrity. If not installed immediately, store according to normal application regulations.
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Basic channel steel and bolts for installation are provided by the user.
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Inspect cabinet coating, ensuring it is dry and clean.
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Verify electrical appliance switching and auxiliary contact accuracy.
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Insulation value must be ≥1MΩ. Disconnect sensitive electronic components during measurement.
Precautions for use: Regular inspection of low-voltage air circuit breakers is required to prevent contact resistance increase due to carbon substances from long-term operation.
Main Circuit Solution
Product Appearance and Dimensions
| A | B | C | D | H |
| 800(600) Optional | 500(400) Optional | 650(450) | 450(350) | 1800(1600) Optional |
Ordering Instructions
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Specify all Models (Main and Auxiliary circuit solution numbers).
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Provide main circuit system diagram and cabinet plan layout.
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Electrical schematic diagram of the auxiliary circuit.
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Component list and Main bus specifications.
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Cabinet color (Default: light camel gray) and dimensions.
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Note any special requirements differing from normal conditions.
Frequently Asked Questions
What is the standard operating temperature for this equipment?
The ambient temperature should be between -5℃ and +40℃, with a 24-hour average not exceeding +35℃.
What is the maximum altitude for installation?
The equipment is designed for installation at altitudes not exceeding 2000 meters.
Does the motor circuit include phase loss protection?
Yes, the motor circuit features overload, short circuit, undervoltage, and phase loss protection functions.
What is the required insulation resistance before commissioning?
The insulation value measured by a megohmmeter should not be less than 1MΩ.
Can I customize the cabinet color and dimensions?
Yes, while light camel gray is standard, custom colors and dimensions can be provided based on user requirements during ordering.
Which international standards does the product comply with?
The electrical performance fully complies with GB 7251.1 and IEC60439-1 standards.