Product Description:

XL-21 power distribution cabinet is widely used in power plants and industrial and mining enterprises. It is used for power or lighting distribution in power distribution systems such as three-phase three-wire, three-phase four-wire, and three-phase five-wire power distribution systems below 690V. It is installed against the wall indoors, operated in front of the screen, and inspected in front of the screen; the box is a fully enclosed structure assembled from C profiles or 8MF profiles. A new type of rotary load isolating switch is used in the box, which can be operated with load. The front door is equipped with voltage and current indicating instruments, signal lamps, buttons, transfer switches and other main components. The distribution box adopts self-designed new components, compact structure, beautiful appearance, easy maintenance, and various wiring schemes for users to choose.

This product complies with GB7251.12-2013 and GCS professional standards.

Item Meaning:

Application Condition:

• Altitude: ≤2000m
• Ambient Temperature: -5℃– 40℃/ 23℉–104℉（daily average temperature≤35℃/95℉）
• Relative Humidity: ≤50%（when temp is 40℃/104℉）；≤90% （when temp is 20℃/68℉）
• Installation Environment: no corrosive gas, no violent vibration and impact
• Gradient: ≤5°（to vertical plane）
• Notice: please contact us if the application environment is beyond above range.

Technical Parameters:

Main Circuit Scheme:

There are 105 main circuit schemes in this switchgear, but the schemes and specifications derived from the changes of auxiliary circuit control and protection are not included.

Ordering Instructions:

The following information should be provided when ordering:

• Scheme diagram of the main loop system;
• Auxiliary circuit electrical schematic diagram, auxiliary circuit voltage;
• List of components in the cabinet (including component models, names, specifications, quantities),
• Switchgear layout;
• Cabinet color (supply according to our company’s standard if there is no requirement);
• list of required spare parts;
• Other special conditions of use.

Notice:

• After the product arrives, first check whether the packaging is complete and undamaged. If any problem is found, the relevant department should be notified to find out the reason. For the product that is not installed immediately, it should be placed in a suitable place according to the normal use conditions.
• The bolts for the base channel steel of the product installation shall be prepared by the user;
• Check whether the laminated paint film on the cabinet body is peeled off, and whether the inside of the cabinet is dry and clean;
• Whether the on-off of main electrical appliances and auxiliary contacts is reliable and accurate;
• Whether the selection and wiring principle of the main components are consistent with the principle drawing;
• The insulation value with a 500V megohmeter should not be lower than 1MΩ. When measuring, pay attention to disconnect the unbearable voltage and the wiring of electronic components.
• For low-voltage air circuit breakers, etc., after many times of closing and opening, the main contacts will be partially burned and carbon substances will be generated, which will increase the contact resistance. For the universal low-pressure air, the circuit breaker shall be maintained and overhauled according to the requirements of its instruction manual.