Obsolescence UPS Upgrade – Drill Ship

Replacement of 21 Safety-Critical Uninterruptible Power Supply (UPS) Systems

EOS Europe is a leading energy industry electrical contracting firm that specialises in providing highly skilled electrical project teams for the oil and gas sector. With a strong emphasis on safety, reliability, and performance, EOS Europe enhances offshore operations by supplying qualified personnel for the installation, maintenance, and inspection of electrical systems.

The teams at EOS Europe have extensive experience in providing project support in both challenging offshore and onshore environments, ensuring compliance with industry standards and improving project efficiency. Well-known among major energy corporations, EOS Europe combines technical expertise with a strong commitment to operational excellence, helping clients meet their project deadlines.

Because of their reputation for project delivery, EOS Europe were awarded the electrical scope of works for the Replacement of 21 Safety-Critical Uninterruptible Power Supply (UPS) Systems During Vessel SPS

As part of a recent Special Periodic Survey (SPS) conducted in a Caribbean shipyard, EOS Europe was engaged to remove and replace 21 safety-critical Uninterruptible Power Supply (UPS) systems on behalf of the client. This scope was essential to ensure the continued reliability and compliance of the vessel’s power infrastructure, which supports safety and control systems.

Planning and Compliance

Comprehensive pre-work preparations were undertaken in full alignment with the client’s HSEQ policies and procedures. This included the development and approval of:

  • Permit-to-Work documentation
  • Task-specific Risk Assessments
  • Method Statements tailored to site and operational conditions

All preparatory activities were designed to ensure a safe and compliant execution strategy in line with industry best practices.

Execution Scope

The works included the following:

  • Safe isolation of existing electrical systems
  • Review and updating of as-built documentation
  • Disconnection and removal of associated power, control, and instrument cabling
  • Decommissioning and removal of existing UPS units, battery chargers, and battery banks

All removal activities were carried out by EOS personnel in accordance with approved rigging and lifting

procedures, ensuring safety and control in confined or sensitive areas of the vessel.

Installation and Commissioning

New UPS units, including chargers and batteries, were transported and installed using the same rigorously controlled rigging and lifting methods. EOS Europe then completed:

  • Cable glanding and termination
  • System testing and verification
    • Mechanical completion of all installed equipment and associated cabling

All installation activities were carried out in accordance with client specifications and were subject to inspection and approval by both the client’s representative and the DNV surveyor.

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