Objectives

The primary objective is to procure a qualified contractor to perform comprehensive annual maintenance and major servicing of critical electrical infrastructure at Mosvold Hospital. This ensures reliable power distribution, extends equipment lifespan, maintains regulatory and safety compliance, and prevents operational disruptions within an active healthcare facility.

Scope of Work

The contract encompasses the major service of one transformer and one Medium Voltage (MV) Ring Main Unit (RMU). Key deliverables include:

• Full isolation, safety preparation, and implementation of lockout/tagout procedures.
• Visual and mechanical inspections for corrosion, loose fittings, cracked bushings, and mounting structures.
• Transformer oil replacement, laboratory testing (dielectric strength, moisture, acidity, and dissolved gas analysis), and conservator/breather maintenance.
• Electrical performance testing including insulation resistance, winding resistance, and turns ratio measurements.
• Cooling system verification, protection device testing (Buchholz relay, temperature indicators, alarms), and trip circuit validation.
• MV switchgear servicing: cleaning, busbar and cable termination inspection, vacuum circuit breaker racking/contact checking, lubrication, timing tests, and protection relay calibration.
• Submission of post-service documentation: unit-specific service reports, signed schedules/job cards, and compliant invoices.

All work must occur between 07:00 and 16:00, adhere to strict health and safety protocols, avoid patient/staff disruption, utilize new SANS/SABS-compliant materials, and include proper waste disposal at authorized sites.

Technical Requirements

• Registration & Compliance: Valid CIDB registration (Electrical EB or EP), current SARS tax clearance certificate, B-BBEE verification document, and a Letter of Good Standing from the Department of Labour.
• Insurance: Public liability insurance coverage of at least R3,000,000.
• Experience: Three traceable completion certificates demonstrating prior execution of similar transformer and switchgear services.
• Pricing & Validity: Firm, all-inclusive pricing (VAT included if registered) valid for ninety days. Maximum mark-ups apply to bought-out items based on contract value thresholds.
• Evaluation Framework: Eighty percent weighting for competitive pricing and twenty percent for socio-economic transformation goals.

Skills Requirements

• Deployment of a certified Qualified Artisan Electrician or Wireman, with credentials issued within the last three months.
• Deployment of a certified High Tension (HT) Accredited Electrician, with credentials issued within the last three months.
• Proficiency in high-voltage safety management, advanced diagnostic testing, and precise technical reporting.
• Ability to execute complex procedures including secondary injection testing, DGA interpretation, relay calibration, and SCADA signal verification.
• Strong project coordination skills to maintain hospital operations, manage site logistics, and ensure strict adherence to contractual timelines and quality benchmarks.

Explanation of Technical Terms

• Ring Main Unit (RMU): A compact, factory-assembled metal-enclosed switchgear assembly used to safely distribute and protect medium-voltage electrical circuits in urban and industrial networks.
• Dissolved Gas Analysis (DGA): A highly sensitive diagnostic test that measures concentrations of specific gases dissolved in transformer insulating oil to detect early-stage internal faults such as overheating or arcing.
• Lockout/Tagout (LOTO): A standardized safety protocol requiring physical isolation of energy sources and application of warning tags to prevent accidental re-energization during maintenance.
• Secondary Injection Testing: A controlled calibration method where simulated fault currents are injected into protection relay inputs to verify tripping accuracy without exposing technicians to live primary voltages.
• 80/20 Preference Point System: A government procurement scoring model where eighty points are allocated based on price competitiveness and twenty points are reserved for designated socio-economic transformation targets, specifically 100% Black African ownership in this tender.