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A dual power distribution box for automatic transfer between two utility sources or between utility and generator supply.
Designed for electrical distribution systems that require stable operation, clear circuit protection, and practical installation for industrial, commercial, utility, and infrastructure projects.
Dongfang Electric Power (Shandong) Co., Ltd. supports product selection by voltage level, rated current, installation environment, cabinet structure, cable connection method, and project documentation needs.
SXL Series Dual Power Distribution Box
Product Overview
The SXL dual power distribution box is used in power grid systems for starting and switching between utility power and utility power, or between utility power and generator power, so that continuous power supply can be maintained.
The automatic transfer distribution box can complete automatic switching for three-phase three-wire and three-phase four-wire dual power supply systems. The controller simultaneously detects both supply voltages. A voltage higher than 110% of the rated value can be judged as overvoltage, while a voltage lower than 80% of the rated value can be judged as undervoltage or loss of voltage. The detection result is logically processed and, through an adjustable delay circuit, drives the corresponding opening or closing command to the voltage operating mechanism. The detection results are shown on the LCD display of the intelligent automatic controller panel. If the standby power source fails, the alarm reminds the user to repair the standby source and helps locate the cause so the fault line can be repaired as quickly as possible and normal dual power supply can be maintained.
Application Scope
Dual power distribution boxes are widely used in important places where power interruption is not allowed, such as elevators, fire protection, monitoring and operating rooms.
Operating Logic
| Power Source | Supports utility-to-utility or utility-to-generator starting and switching. |
|---|---|
| Switching System | Completes automatic transfer for three-phase three-wire and three-phase four-wire dual power supply. |
| Overvoltage Judgment | Power supply voltage higher than 110% of the rated value can be judged as overvoltage. |
| Undervoltage Judgment | Power supply voltage lower than 80% of the rated value can be judged as undervoltage or loss of voltage. |
| Display and Alarm | Detection results are shown on the intelligent controller LCD; standby power faults trigger an alarm to remind users to repair the standby source. |
Products are selected for reliable distribution, protection, switching, and control in practical power systems.
Equipment can be matched to voltage level, capacity, cabinet structure, cable entry, and installation environment.
Technical documents, drawings, labels, packing, and delivery requirements can be coordinated for project use.
Dongfang Electric Power (Shandong) Co., Ltd. focuses on project-oriented power distribution equipment, including distribution boxes, distribution cabinets, withdrawable switchgear, ring main units, cable branch boxes, compensation cabinets, metering systems, busway systems, and power cables.
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