Three-Phase Transformer Measuring Bridge – Overview

The MLS 7100 was particularly designed to simplify the determination of transformer core and copper losses, which is an ideal choice when working on site. The measuring bridge features open-circuit as well as short-circuit measuring. Many transformers can be directly connected to the MLS 7100 without needing further transducers. Core losses are an important transformer quantity in electrical efficiency, operating expenses, and the overall transformer value.

Steel losses are typically determined using open-circuit measurement, as a relatively small magnetising current is flowing. Using this technique, the copper losses are minimized due to the square correlation of power and current. Copper losses are determined using short circuit measurement, as the magnetising modulation of the steel core should be minimized. In addition, the short circuit voltage is determined this way, which is also an important quantity.

Three Phase Transformer Measuring Bridge – Features

• Open circuit measurements
• Short circuit measurements
• Free selectable voltage and current dividers
• 1000 kV with transducer
• 1000 kA with transducer
• 550 V (chained) 6 A directly connectable
• Measures and displays:
  • Voltages
  • Currents
  • Power
  • Short Circuit Values
  • Frequency
• Centronics printer port
• RS232C port for external control

Datasheet