From the electrical test to the grid & plant protection, our protection concepts offer you safety with the latest technology and stand for trouble-free operation.

Reliability and economic efficiency are becoming increasingly important as the demands placed on technical systems and energy supply networks are constantly changing. It is therefore inevitable that the safety and quality of your electrical power supply are guaranteed. At TRIPS, internationally experienced system engineers and experts in plant design, engineering, switchgear production, protection testing, and commissioning work closely together for your project.

From hardware engineering to network design, parameterization and electrical testing of your protection devices, we offer you the complete range of services from a single source.

In this way, we develop state-of-the-art concepts for grid, machine and plant protection that safeguard the supply and make a significant contribution to optimum plant availability and to safeguarding your investments.

This is important for you

Protection devices must respond quickly and selectively to faults and errors in order to minimize supply interruptions. As networks are expanded and upgraded, protection concepts and settings are changing faster and faster. In addition to the periodic tests, protective devices must be comprehensively tested after each modification.

We test your protective devices reliably and quickly. We cover the complete range of electromechanical and digital protection relays from all leading manufacturers and at all common voltage levels.

Overview of services:

  • commissioning of complete switchgears
  • Planning and realization of emergency power systems
  • commissioning and repeat testing of protective devices from all manufacturers
  • determination of protection settings values
  • network calculation
  • workload & short circuit calculations, selectivity calculations
  • planning and construction of switchgears for protection and station control technology
  • Parameter files for software (e.g. DIGSI parameterization of plant data and protection setting values for the protection devices)
  • Cyber Security

Numerous customers from a wide range of industries and applications, such as generation, transmission, conversion, and distribution, trust us with their plant protection systems.

generator and motor

  • Generator differential protection (ANSI 87G)
  • Ground fault differential protection (ANSI 87N)
  • Stator ground fault protection
  • Rotor ground fault protection (IRE>, fn) (ANSI 64R)
  • Overexcitation protection (ANSI 24)
  • Underexcitation protection (ANSI 40)
  • Out of step protection (ANSI 78)
  • Unbalanced load and negative-sequence protection (ANSI 46)
  • Reverse power protection (ANSI 32R)


  • Line differential protection (ANSI 87L)
  • Distance protection (ANSI 21, 21N)
  • Teleprotection
  • Automatic reclosing
  • Fault Locator


  • Transformer differential protection (ANSI 87T)
  • Inrush current detection
  • Thermal overload protection (ANSI 49)
  • Transformer tap-changer
  • Voltage regulator (ANSI 90V)


  • Busbar differential protection
  • Bus Coupler Differential Protection
  • Inherent Circuit-Breaker Failure Protection

capacitor bank protection


  • Directional and nondirectional sensitive ground fault protection (ANSI 67Ns, 51Ns)
  • Directional and nondirectional overcurrent protection Phase, Earth (ANSI 67, 51, 67N, 51N)
  • Over und Undervoltage protection (ANSI 59, 27)
  • Over und Underfrequency protection (ANSI 81)
  • Switch on to Fault (SOTF)
  • Breaker Failure protection (ANSI 50BF)
  • Synchronization Function (ANSI 25)

Depending on the application, we always have the right solution for you. Customized to your requirements, we carry protection devices from various manufacturers such as the current Siemens Siprotec devices (SIPROTEC 4 and SIPROTEC 5) and Sicam systems (SICAM230 and SICAM PAS) or ABB Relion (Relion 615 series), Schneider Easergy MiCOM, SEL, Woodward, Alstom, and GE. In addition to the components, we build and test your systems following VDE and BGV guidelines.

We offer you the complete range of services from plant design to engineering, protection tests and commissioning:

plant design

  • Development of network and protection concepts for new projects as well as for the expansion and modernization of existing plants
  • Dimensioning of protection devices, calculations
  • CAD plan creation for HV/MV and protection technology switchgear with ELCAD / EPlan P8 / Engineering Base (Aucotec EB)

software engineering

  • Parameterization of all protection devices (including SIEMENS DIGSI, ABB PCM 600, Easergy studio, SELinc, SmartView, EnerVista)
  • Parameterization and connection of switchgears to control and telecontrol systems
  • Station control system SICAM PAS / Telecontrol RTU

Protection tests

  • Effective and cost-effective standard and special tests of all types of protective devices
  • Creation and execution of test procedures
  • Test of the protection technology with OMICRON CMC 356

Switchgear production

  • Based on all common makes as well as special designs including complete hardware tests
  • Packaging(also seaworthy) and worldwide transport including customs clearance

Network / Generator Analysis

  • Measurement and analysis of power quality according to VDE/DIN regulations
  • Inspection of generators with recording and evaluation of voltages and currents
  • Added value by reducing operating costs


  • Commissioning of the protection and station control technology at home and abroad

Contact us

Do you have an individual inquiry or general questions on the subject? Send us an email to or fill out the form. Our experts will be glad to help you and find the perfect solution for you!

The tasks of protection engineering

The components in electric power systems represent high value assets. Their failure leads to an interruption of the power supply with possibly far-reaching effects on downstream systems. Protecting these components from the effects of electrical faults and reliably continuing to supply unaffected loads is the job of the protection technology.

Faults must be quickly detected, reliably recorded and selectively switched away. This task is to be fulfilled within economically justifiable limits. Always staying true to the motto: “As much as necessary, as little as possible.”

Fast error detection:

In order to minimize the impact on switchgear, cables, transformers and generators and not to endanger the stability of the grid, faults must be switched off as quickly as possible. Particularly in switchgear, very long short-circuit times may be required in the case of time staggering. Arc short circuits within the switchgear do not have any significant effects on the switchgear only for very short fault times (tk < 100 ms). In the case of supply by self-generating units in isolated operation, long fault times lead to instability of the generating units, which manifests itself in a frequency rise or frequency dip, depending on the fault location. Therefore, error times of more than one second should be avoided.

Safe defect recording:

It must be possible to reliably distinguish faults from operational events. This is particularly important if the maximum operating currents are only insignificantly lower than the minimum short-circuit currents. A typical application example is an emergency power network with feed-in from the utility grid and switchable to an emergency generator in the event of a grid failure.

Selective fault propagation:

Faults in a network section must not lead to total failure. It is the task of the protection system to clearly identify the type and location of the fault and to disconnect only the faulty section.

In low-voltage networks, the protective devices often have to provide additional protection against electric shock under fault conditions (formerly: zeroing). Protection systems must be planned to fulfill these tasks. An unplanned or incorrectly planned selective protection system can only be subsequently converted into a selective protection system at great expense. In low-voltage networks, this is almost impossible in many cases.