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Tang Tech & Engineering Ltd

Class V electrical works contractor for MV/HV power, testing, automation and ICT across Tanzania.

CRB Class V · EWURA Class A · BRELA 168901461

Services

  • MV/HV overhead line construction
  • Substation & transformer installation
  • Switchgear & metering panels
  • Testing, diagnostics & commissioning
  • Electrical installation & standby power
  • ICT & security systems
  • Automation & control systems

Company

  • Projects
  • Products
  • Trainings
  • Clients & partners
  • About
  • Contact

Contact

  • Tabata Business Centre Building, 1st Floor
    Dar es Salaam, Tanzania
  • +255 616 627 609
    +255 659 801 321
  • info@tangtecheng.com
© 2026 Tang Tech & Engineering LtdImage credits
HomeProductsSwitchgear & protectionNumerical protection relays

Numerical protection relays

Close-up of a control panel with indicators and switches

Switchgear & protection

Feeder, transformer & motor protection

Digital relays for overcurrent, earth-fault and differential protection with event recording.

  • Overcurrent, earth fault, differential and voltage protection
  • Disturbance and event recording for fault analysis
  • IEC 61850 communication on modern models
  • Set, tested and documented by our protection engineers
Request a quoteInstallation & testing

Typical specifications

Functions
50/51, 50N/51N, 87T, 27/59
Communication
IEC 61850 / Modbus
Auxiliary
24–250 V DC / AC

Final ratings are confirmed against your site requirements and the manufacturer's datasheet at quotation.

Example product families

  • Schneider Electric Easergy P3
  • ABB Relion 615 series

Brand availability depends on current supplier stock. Ask us for equivalents.

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MV vacuum circuit breakers & panels

12 – 36 kV · up to 2,500 A

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Pole-mounted auto-reclosers

15 – 38 kV · 630 – 800 A

Automatically clear transient faults and restore supply on overhead lines without a site visit.

Planning a substation, line or upgrade?

Send us your site details and drawings. An engineer will review them and come back with a scope and quotation.

Request a quote +255 616 627 609