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TLM Series Transformer Loss Measuring System

The TLM Series from KVTEK is a high-precision transformer loss measuring system designed for power loss analysis in single- and three-phase transformers. Utilizing advanced current comparator technology, it ensures unmatched accuracy in measuring load and no-load losses for transformers with rated voltages up to 200 kV and currents up to 4000 A.

Compact, reliable, and intuitive, the TLM Series is widely used in R&D laboratories and manufacturing plants, significantly reducing test preparation time while ensuring confidence in acceptance testing and compliance with IEC/ANSI standards.

Ordering Models

Function

  • Measures load losses to assess winding resistance and stray losses

  • Detects core defects and saturation via no-load loss measurement

  • Conducts heat run to verify oil and winding temperature rise

  • Performs induced voltage test for insulation withstand validation

  • Evaluates zero-sequence impedance for phase sequence analysis

  • Functions as a wattmeter for real-time power readings

  • Provides full PC/laptop control with graphical Windows software

  • Generates automatic PDF reports for documentation

Technical Specifications

Voltage Measurement

  • Range: 100 V – 200 kV

  • Accuracy: ±0.05%

Current Measurement

  • Range: 1 A – 4000 A

  • Accuracy: ±0.05%

Power Measurement Accuracy

  • cos φ = 1.000 (100 V, 25 A): ±0.05%

  • cos φ = 0.100 (25 A): ±0.10%

  • cos φ = 0.050 (25 A): ±0.10%

  • cos φ = 0.010 (25 A): ±0.10%

System Architecture Components

  • Voltage Divider: Corona-free, SF6-insulated, concentric electrodes for high-accuracy phase-to-ground measurement

  • Current Comparator: Oil-insulated toroidal coil with high-permeability core, automatic secondary shorting

  • Control Panel: Integrated voltage & current channels, power analyzer, remote tap selection

  • PC-Based Controller: Windows-based software for control, visualization, and reporting

Power Supply

  • 230 VAC ±10%, 50 Hz / 115 VAC +10%, 60 Hz

  • Power Requirement: 1000 VA

Environmental Conditions

  • Operating Temperature:

    • Desk & Rack: 10°C to 30°C

    • HV Components: 10°C to 40°C

  • Storage Temperature: –25°C to 55°C

  • Humidity: 30% – 80% RH (non-condensing)

Scope of Supply

  • 3 Voltage Dividers (SC 100 or SC 200)

  • 3 Current Transformers (I 2000 or I 4000)

  • Control Cabinet with integrated measurement channels

  • Laptop/PC with preinstalled TLM software

  • Interconnection Cable Kit (excl. HV/HV-current cables)

  • Instruction Manual

  • Calibration Report

Ordering Models

  • Model # TIM 100–2000: Rated for 100 kV, 2000 A

  • Model # TIM 200–4000: Rated for 200 kV, 4000 A

  • Custom configurations available on request

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