Substation Construction Management in Korea: Design Review to Method Statement

Substation construction management in Korea covers reviewing the design, notifying the construction plan, and preparing commencement documents and the method statement so that the project runs to program. Substations overlap civil, building and electrical works and often call for special methods, so problems missed before construction come back as design changes and delays. This guide covers three stages: design review, commencement documents and the method statement.

Contents

• Common Pre-Work Review
• 1. Design Review
• 2. Commencement Documents
• 3. Method Statement
• What the Method Statement Includes
• FAQ
• Reference Standards
• Summary

Common Pre-Work Review

Before construction, obtain the contract and design documents (drawings, quantity calculations, general and particular specifications, procurement and fabrication specifications, cost breakdown) from the client. Also review the Electricity Business Act, Electric Technology Management Act, Framework Act on the Construction Industry, the construction waste recycling act, KEC, KS, pre-use inspection criteria, KEPCO design standards and supervision standards.

1. Design Review

1. Obtain the contract and design documents before construction.
2. Understand the designer’s intent and review drawings and specifications in detail.
3. Review equipment type, scale, insulation design and layout to find problems early, and set out causes, effects and remedies.
4. Check special methods and other items in the particular specifications carefully.
5. Review the civil and building schedules for clashes.

If design errors or omissions require a change, submit a review opinion to the client or supervisor.

2. Commencement Documents

1. Review the contract and list the documents needed for the commencement notice.
2. Build a detailed schedule by workload from the contract bar chart, ready for price-escalation adjustments.
3. Submit a review opinion to the supervisor so findings are reflected in the design.
4. Review standard and particular specifications to understand the project’s characteristics.

The detailed schedule sets weekly and monthly activities for preparation, earthing and foundations, steelwork and bus, equipment installation, panels and control cabling, and commissioning tests, along with how clashes with other trades will be managed.

3. Method Statement

1. Plan construction to suit the characteristics of substation work.
2. Prepare material supply (client- and contractor-supplied), labor and equipment plans based on the material management plan.
3. Identify all permits needed for construction and build them into the plan.

During construction, keep quality checklists and photos of site conditions for every trade — they are the evidence at inspection and completion.

What the Method Statement Includes

Item	Content
Commencement notice	Documents for notifying the start of work
Purpose and overview	Scope, scale, main equipment
Schedule management plan	Detailed schedule and clash management
Safety and health plan	Hazards and controls by process
Quality plan	ITP and quality checklists
Environmental plan	Noise and vibration, waste, SF6 and oil
Test and inspection plan	Stage tests and pre-use inspection readiness

This structure follows the method statement items in the NCS considerations. Use the client’s template where one exists.

FAQ

Reference Standards

• Electricity Business Act (전기사업법) — law.go.kr
• Electrical Safety Management Act (전기안전관리법) — law.go.kr
• Electric Technology Management Act (전력기술관리법) — law.go.kr
• Electrical Construction Business Act (전기공사업법) — law.go.kr
• Occupational Safety and Health Act (산업안전보건법) — law.go.kr
• Korea Electro-technical Code (KEC, 한국전기설비규정) — law.go.kr
• Technical Standards for Electrical Equipment (전기설비기술기준) — law.go.kr
• KEPCO design standards and substation construction practice; Korean Industrial Standards (KS)
• Framework Act on the Construction Industry (건설산업기본법) — law.go.kr
• Construction Waste Recycling Promotion Act (건설폐기물의 재활용촉진에 관한 법률) — law.go.kr
• NCS competency unit Substation Construction Management (변전설비 공사관리, 1901070322_22v2; NCS is Korea’s National Competency Standards) — ncs.go.kr

Summary

The most common mistakes are starting work on the contract bar chart without a detailed schedule, and discovering clashes with civil and building works only after starting. Design review depends on designer intent, particular specifications and clashes; commencement on the detailed schedule and review opinions; and the method statement on material, labor and equipment plans and permits. Related guides: Substation Site Execution Management, Quality, Safety & Environmental Management, Substation Inspection & Completion. A Korean version of this guide is available here.

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This article restructures the Korean NCS competency unit ‘Substation Construction Management’ (변전설비 공사관리, code 1901070322_22v2) as a practical reference. Actual work must follow applicable standards and the judgment of qualified professionals; always confirm specific values, deadlines and criteria against the latest regulations and client standards.

Written/reviewed by VOLT · Last updated 2026-10-26