Power System Protection Services

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Power System Protection Services

Protect your power, protect your people.

At Hertz Engineering Ltd, we deliver comprehensive Power System Protection services to ensure safe, selective, and reliable operation of electrical infrastructure. From utilities and substations to industrial and mining facilities, we help safeguard your assets and personnel against electrical faults and abnormal conditions.
Our protection solutions are guided by IEC, IEEE, NFPA, and local utility standards (GRIDCo, ECG, NEDCo), and are backed by hands-on experience and advanced analysis tools.

Core Protection Services

Protection System Design
  • Design of protection schemes for transmission, distribution, and industrial systems
  • Application of primary and backup protection principles
  • Relay selection and setting calculation (ABB, SEL, Siemens, Schneider, etc.)
  • Design of intertripping, autoreclosing, differential, and distance protection systems
Protection Coordination Studies
  • Time-current characteristic (TCC) curve analysis
  • Relay grading and coordination for MV/HV systems
  • Elimination of nuisance tripping and minimization of outage areas
  • Software-based studies using ETAP, DIgSILENT, and PowerFactory
Relay Setting & Configuration
  • Programming and setting of numerical relays (ANSI codes: 50, 51, 87, 21, etc.)
  • Parameter tuning for overcurrent, earth fault, distance, and differential protection
  • Testing and validation in both single-ended and redundant systems
Testing & Commissioning
  • Primary and secondary injection testing
  • Relay functional testing and protection scheme validation
  • Circuit breaker timing and trip coil integrity checks
  • Commissioning support and FAT/SAT documentation
Fault Analysis & Troubleshooting
  • Post-event fault investigation and incident diagnosis
  • Root cause analysis of tripping events or relay misoperation
  • Recommendations for corrective action and future prevention
Supported Equipment & Protocols:
  • Numerical Relays: Siemens SIPROTEC, ABB RELION, SEL, Schneider Micom, GE Multilin
  • Communication Protocols: IEC 61850, Modbus, DNP3
  • Protection for: Transformers, feeders, motors, generators, busbars, transmission lines
Our Competitive Advantage:
Power System Protection Services
In-house protection & automation experts
Power System Protection Services
UReal-world commissioning experience on 11kV to 330kV systems
Power System Protection Services
Strong interface with SCADA, RTU, and substation automation systems
Power System Protection Services
Compliance with local grid codes and international protection standards
Power System Protection Services
Fast-response fault analysis and field support
Partner with Hertz Engineering Ltd for intelligent, compliant, and robust protection systems.

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The company has earned a reputation for excellence and professionalism for continuously striving to meet and even exceed standards which set the climate for a sustainable business relationship with its clients. 

Hertz Engineering Ltd
Contacts
Phc-079-0175,Essipon St.Benedict Junction. Takoradi. Ghana
(+233) 0205 115 425

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