As a strategic means of streamlining the services we offer our clients; ZML is structured into five different divisions or business units (BU’s) that work in unison. This was done in an endeavor to fully optimize our services and to offer the best-suited solutions to our varying clientele. The divisions are as follows:

AProfessional Services Division (PSD)PSD

PSD is the intellectual property centre of ZML. All the professional engineers and technologists undertaking professional design work and project management services are housed in this division.

Through the PSD division, ZML is able to provide a full scope of services to our clients ranging from inception (feasibility studies), design (preliminary & detailed), tender specification & contractor procurement, technical bid evaluations and adjudication, contractor appointment recommendations, site project management services and finally client close-out reports.

BSubstations Division (SBD)SBD

SBDis primarily composed of a number of operating units, namely:

  • Substation Design and Construction
    • Substation Design and Construction Process
    • Site Selection and Design
    • Permitting and Environmental Issues
    • Foundation Design
    • Bus Designs
    • Substation Layout: Converting 1-line Diagrams to Physical Layouts
    • Grounding and Ground Grid Design
    • Substation Structures
    • Major Substation Equipment
    • Secondary Substation Equipment
    • Auxiliary Equipment and Systems
    • Protective Relaying and Control
    • Expansion and Upgrade of Existing Substations
    • Commissioning and Start Up
  • Substation Automation
    • Substation SCADA systems and RTU installations
    • Substation SCADA configuration and commissioning
    • Protective Relaying and Control
    • Expansion and Upgrade of Existing Substations
  • Switchgear
    • Switchboard and feeder boards replacements
    • Switchboard extensions
    • Switchgear maintenance
    • Circuit breaker speed-testing

Both these units primarily execute all ZML’s substation construction and engineering projects in both the EPCM and EPC type contacts with support and over-sight offered by the PSD. ZML is currently registered in CIDB in the following construction categories:

  • CE – Civil Engineering
  • GB – General Building
  • ME – Mechanical Engineering
  • EP – Electrical Infrastructure
  • EB – Electrical Building Services and
  • SF – Fire Prevention & Protection Systems

Through our SBD, ZML procures all equipment and building materials, plant and provides all the necessary trades (including skilled and non-skilled labour) to complete projects assigned. The SBD provides further, all site-based supervisors and engineers. This division ensures that all ZML contracting projects are physically carried and completed within budget, and on time.  PSD in conjunction with the SBD ensures the proper commissioning of all infrastructure and equipment on completion before these projects are handed over to clients. They would also be the principal authors of all closeout reports. 

Where possible, the SBD will maximize the use of local labour in line with ZML’s objective of contributing to the EPWP programme. As part of this programme, the SBD will also provide on-site training of all participants so that they may be exposed to the various activities that the SBD carries out as part of its day-to-day operations.

CHigh Voltage Testing Division (HVD)HVD

  • Transformer testing and diagnostics
    • Power transformers
    • Distribution transformers
    • Voltage transformers
  • Failure Investigations
  • High and Medium voltage switchgear
  • Miniature substations and switching pillars
  • Cable Fault location

The HVD participates in these contracts normally under the auspices of an overall Facilities Management (FM) contract or only as a technical service provider. On both occasions, the HVD will provide all the technical resources, i.e. HVAC Technicians, Standby Plant Technicians, Electronic Technicians (CCTV, Access Control & Fire), Switchgear Electricians & Operators, Fitter & Turners and Boilermakers. The HVD personnel will assist the client in the day-to-day plant operations, maintenance activities, plant optimization and ensuring that plant availability is maintained as per the SLA agreement.

At the request of the client or depending on the contract structure, HVD will provide dedicated FM managers who will normally be stationed at one of our regional offices.

DElectrification Division (ELD)ELD

  • MV overhead lines (22 kV and 11 kV)
  • MV underground cabling
  • MV transformer installation and testing
  • Mini-substations
  • Low cost housing
  • House connections and disconnections
  • Meter installations and readings
  • Streetlighting

EBuilding Services Division (BSD)SBD

  • MV/ LV reticulation
  • UPS systems
  • Emergency Power Systems (EPS) and standby generator systems
  • CCTV Systems
  • Intruder and Access control systems
  • Building Management Systems (BMS)
  • Energy initiatives
  • HVAC systems
Quick Contacts:
+27 (0)33 347 0000 / 0501 (Head Office)
22 Montrose Park Boulevard, PMB
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