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China XL-21 AC Low Voltage Power Distribution Cabinet - Reliable Suppliers & Factory Solutions for Power Plants
Model and Definitions
Use environment
- Ambient temperature: -5℃ ~+40℃, 24h The average temperature inside does not exceed +35℃.
- Altitude: no more than 2000m.
- Relative Humidity: No more than 50% when the ambient air temperature is +40℃; higher relative humidities can be achieved at lower temperatures (e.g. 90% at +20℃), taking into account temperature changes. Moderate condensation is permitted.
- When the equipment is installed, the inclination to the vertical plane should not exceed 5 °.
- The equipment should be installed in a place without severe vibration, impact and corrosion. Note: If the above conditions are exceeded, please consult with our company.
Product technical features
- The electrical performance fully complies with GB 7251.1 and IEC60439-1 relevant provisions.
- The feeder switch adopts a new type of molded case circuit breaker and compound release with small size, high breaking rate, short arcing (or no arcing). It has overload and short circuit protection devices and can be equipped with leakage protection function according to user requirements.
- The motor circuit has overload, short circuit, undervoltage and phase loss protection functions.
- The auxiliary circuit has local and remote control functions and local and remote 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 |
Precautions before installation, acceptance and commissioning
After the product arrives, first check whether the packaging is intact. If any problems are found, notify the relevant department in time to find out the cause. For products that are not installed immediately, they should be installed according to normal application conditions.
Regulations, placed in appropriate places.
- The basic channel steel and bolts for product installation are provided by the user. The connection holes between the basic channel steel and the cabinet body (see Figure 1).
- After the product is installed, it should be inspected and tested before it is put into operation.
- Check whether the cabinet's coating has fallen off and whether the cabinet is dry and clean;
- Whether the on and off of main electrical appliances and auxiliary contacts are reliable and accurate;
- Whether the selection and wiring principles of the main components are consistent with the schematic diagram;
- The insulation value of the megohmmeter is not less than 1MΩ. When measuring, be careful to disconnect wires that cannot withstand voltage and electronic components.
◇ Precautions for use
After a long time of opening and closing, the main contacts of low-voltage air circuit breakers will be partially burned and carbon substances will be produced, which will increase the contact resistance. Universal low-voltage air circuit breakers should be regularly inspected according to their instructions. Maintenance and repairs are required by the instructions.
Main circuit solution
Product appearance and installation dimensions
| A | B | C | D | H |
|---|---|---|---|---|
| 800(600) Optional | 500(400) Optional | 650(450) | 450(350) | 1800(1600) Optional |
Ordering Instructions
- All Models of the product (including main circuit solution number and auxiliary circuit solution number).
- Main circuit system diagram, cabinet plan layout diagram.
- Electrical schematic diagram of auxiliary circuit.
- List of components in the cabinet (Main bus specifications).
- Cabinet color (If no requirement, light camel gray will be supplied), cabinet dimensions.
- Other special requirements that are inconsistent with the normal Application Conditions of the product.
Frequently Asked Questions (FAQ)
Q: What are the standard environmental conditions for operating this equipment?
A: The equipment operates within an ambient temperature range of -5℃ to +40℃ (with a 24-hour average inside temperature not exceeding +35℃). The altitude should not exceed 2000m, and relative humidity should remain under 50% at +40℃ (higher humidity is allowed at lower temperatures, e.g., 90% at +20℃). The vertical installation inclination must not exceed 5°.
Q: Does the equipment comply with international electrical standards?
A: Yes, the electrical performance of this product fully complies with the relevant provisions of GB 7251.1 and IEC60439-1 standards.
Q: What protection features do the motor and feeder circuits offer?
A: The motor circuit features overload, short circuit, undervoltage, and phase loss protection. The feeder switch uses a molded case circuit breaker providing overload and short circuit protection, with optional leakage protection available upon request.
Q: What is the rated insulation voltage and frequency of this product?
A: The product has a rated insulation voltage of 660V and operates at a rated frequency of 50Hz. The main circuit nominal voltage is AC 380V.
Q: What maintenance is required for the low-voltage air circuit breakers?
A: Due to repeated opening and closing, the main contacts may experience partial burning or carbon buildup, which increases contact resistance. Regular inspections, maintenance, and repairs should be carried out according to the product instruction manual.
Q: What information must be provided when placing an order?
A: Orders require the complete product model (including main and auxiliary circuit solution numbers), main circuit system diagram, cabinet layout, auxiliary circuit electrical schematic, component list (including main bus specifications), cabinet dimensions, color preference (default is light camel gray), and any special requirements.