Introduction
The 500 kVA compact substation is an efficient, smart and modular power distribution solution. Designed to meet the demands of modern power system, it features high space utilization, rapid installation/commissioning, and easy operation/maintenance. Its compact design integrates the transformer, electrical equipment, control system, etc. within a enclosed structure. The overall structure is sturdy and reliable, capable of adapting to various complex environmental conditions.
Features
Reliable
The enclosure features galvanized aluminum-zinc steel panels for the exterior and standardized container-grade materials for the framework. The internal cladding panels are constructed with interlocking aluminum alloy plates, with fireproof insulation materials sandwiched between the layers.
Smart
The substation is designed with intelligent automation, using a microcomputer-based protection system installed across various locations. This setup supports “four remote functions” – remote measurement, remote signaling, remote control and remote adjustment. Each unit operates independently with complete relay protection functions. They enable remote setting of operating parameters, control of internal humidity/temperature, and remote smoke alarm triggering.
Prefabricated
All internal components are pre-installed and tested in factories. On-site work is reduced to enclosure positioning, cable interconnections, protection setting verification and functional testing – cutting total installation and commissioning time to 5-8 days.
Flexible
The modular design allows each unit to operate as an independent system that can be customized for specific operational requirements.
Compact
The substation occupies only about 1/10 of the space required by a conventional type. It can be installed in confined spaces like street corners, squares and factory corners.
Aesthetic
The aesthetically designed enclosure, available in customizable colors, blends seamlessly into the surrounding environment. The 500 kVA compact substation can serve as either a fixed or mobile substation in densely populated areas.
High-voltage Switchgear
Low-voltage Switchboard
Transformer Compartment
Tips
The 500 kVA compact substation primarily relies on natural air circulation for cooling. Therefore, clutter should not be stored around the enclosure. Regular removal of dust from the air vents is also necessary to maintain temperatures below maximum allowable limits.
After the low-voltage circuit breaker trips, the cause must be identified before power is restored, to prevent the accident from escalating.
The high-voltage compartment shall be equipped with zinc oxide arresters, and the configuration must allow convenient testing and replacement.
Devices in the high-voltage compartment should be inspected and maintained regularly. Any identified defects must be addressed immediately. Insulation preventive tests should be conducted periodically as well. If the equipment is out of service for more than 3 months, a comprehensive preventive test should be performed before recommissioning.
When replacing a high-voltage fuse, the transformer must be de-energized. The mechanical interlocks must be properly disengaged during operation, and an insulated hot stick should be used.
All cable entry and exit holes should be sealed to prevent small animals from entering and causing accidents.