Overall solution for temporary power use in infrastructure projects

Detailed plan description

For infrastructure construction sites such as housing construction, municipal administration, roads and bridges, we provide full-cycle services for temporary power consumption, including box-type substation leasing, cable laying and installation, three-level power distribution construction, power acceptance and delivery, and on-site operation and maintenance. Strictly follow the temporary electricity safety regulations at the construction site, adopt a "three-level power distribution, two-level protection" architecture, and flexibly adjust the entry and exit of equipment according to the construction period, taking into account both compliance and economy.

Adapted to Indonesia

Solve the problems of "irregular power supply design, safety supervision risks, rapid changes in construction schedules, and waste of repeated equipment purchases" for construction general contractors, EPCs and equipment leasing parties. The solution covers temporary box-type transformers, distribution boxes, leakage protection, rubber-sheathed cables, grounding, rain and dustproof and leasing/repurchase modes.

Professional specifications and standards based

The power supply system is planned according to the idea of 400/230V three-level power distribution and two-level protection. It is recommended that the mobile distribution box be IP54 or above, all final circuits be equipped with RCD, and the cables are recommended to use wear-resistant and weather-resistant rubber sleeves or products of the same level. Refer to IEC 60364-7-704, IEC 61439-4, IEC 60529, IEC 60947, and combine with local construction safety requirements.

Product specification comparison table

Original experience and test data

Scarce experience: Power supply projects are most likely to cause accidents due to random mopping of cables, failure of insurance protection, and water intrusion on rainy days.

Pitfalls and pain points that I have stepped on

• The power supply design was not standardized and did not meet the safety supervision requirements. The company was ordered to stop work for rectification, delaying the construction schedule;
• The construction load fluctuates greatly, the equipment selection is unreasonable, and the circuit breaker frequently trips during peak hours, affecting the construction progress;
• The cables on the construction site are long and have many points. It is difficult to investigate if the cables are stolen or damaged, and the power outage lasts for a long time;
• The construction period changes frequently, the idle rate of fixed procurement equipment is high, and disposal after the project is completed is difficult and wasteful.

Core parameters

The adaptable capacity of the box transformer is 315kVA~2500kVA, the voltage level is 10kV/0.4kV, and it implements three-level power distribution and two-level protection. The leakage action time is ≤0.1s, which fully complies with the "Technical Specifications for Temporary Electricity Safety at Construction Sites".

Our special contribution

• Compliance design + acceptance agency, 100% passed safety inspection, zero rectification and suspension of work;
• Match the capacity of box-type transformers on demand, support entry and exit in phases, and significantly reduce equipment idle costs;
• Cable anti-theft alarm + intelligent inspection system can quickly locate faults and shorten the troubleshooting time by 80%;
• The on-site operation and maintenance team provides 24-hour emergency response, and power failure will not delay the construction schedule.

Project income

• Economic benefits: The leasing model replaces procurement, and the comprehensive cost of power supply of the project is reduced by 40% to 50%, without considering the later equipment disposal; zero rectification and shutdown, avoiding penalty for delay in construction period, the project of 100,000 square meters can reduce the shutdown loss by more than one million yuan.
• Construction period benefits: Acceptance agency + standardized construction, the power supply cycle is shortened by 50%, and the project can be started in advance; the troubleshooting time is shortened by 80%, and the impact of a single power outage on the construction period is reduced from half a day to one hour.
• Safety benefits: Fully standardized three-level power distribution and two-level protection, reducing the risk of power safety accidents by 90%, in line with construction site safety and civilized construction standards.