Power Transmission Line Trainer Model ELTR 025C

High-voltage networks are usually operated with voltages in the region of 110 kV to 380 kV, whereby urban areas and large-scale industrial facilities are supplied with 110 kV, and 380 kV is used for long-distance transmission lines. The line simulation system is designed for operation at model voltages between 110 V and 380 V. Various voltage levels and line lengths can be selected via corresponding overlay masks.

Item Description

Examinations with the training system can be performed off-load, in normal operating mode, in the presence of a short-circuit or earth fault, with or without earth-fault compensation. The system also permits assembly of complex networks by connecting the line simulation models in parallel or series. The voltage can be supplied via a fixed grid or synchronous generator.

High-voltage lines
• For your safety, the 380-kV transmission lines are investigated and connected at a low-voltage level without detracting from the characteristics of a real high-voltage line.
• Realistic simulation of a 380-kV transmission line with a length of 300 km or 150 km
• Innovative switchover between line lengths by means of over- lay masks
• Earth-fault compensation by means of a Petersen coil
• Ability to simulate symmetric and asymmetric faults

Technical Specifications

In practice, medium-voltage and high-voltage networks are equipped with protective mechanisms connected via current and voltage transformers.
• Use of compact, original relays incorporating cutting-edge digital technology
• Use of industrial safety relays from prestigious international manufacturers
• Monitoring of protective features by means of SCADA (Supervisory Control and Data Acquisition)
• A relay test option permits the relays to be checked individually

Investigations on Three-phase Transmission Lines

– Voltage increases on open-circuit lines
– Voltage drop as a function of line length
– Voltage drop as a function of cos-phi
– Capacitive and inductive power losses on a line as a function of U and I
– Phase shift on a line

Parallel and Series Connection of Transmission Lines

– Distribution of power and current among parallel-connected lines of equal length
– Distribution of power and current among parallel-connected lines of unequal length
– Distribution of power and current among series-connected lines of equal length
– Distribution of power and current among series-connected lines of unequal length
– Load distribution, power flow
– Voltage distribution
– Quantitative and qualitative evaluations of operational relationships

Transmission Line with Earth-fault Compensation

– Earth fault on a line with an isolated star point
– Response to earth faults
– Earth-fault compensation

Transmission Systems with a Synchronous Generator

Overcurrent Time Protection for Lines

Auxiliary Line Protection Equipment

Protection of Parallel-connected Lines

High-speed Distance Protection