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Testing Line Frequency Transformers

Description
This describes the theory and answers common questions on Mains Voltage (50Hz/60Hz) Transformers.
Testing Line Frequency Transformers
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1 Testing Line Frequency Transformers
2 Critical Transformer Tests for Mains Transformers
3 Transformer Basics
4 Transformer cores
5 Transformer Equivalent Circuit
Expand 6 Primary Electrical Parameters6 Primary Electrical Parameters
7 Essential Capability
8 Extended Capability
9 External DC Bias

9.0 External DC Bias – Real Test Conditions for Power Transformers and Chokes

Power transformers and chokes that carry a high dc current are common in power supplies and inverters. Testing these parts at their rated dc current provides complete confidence that the parts have been correctly wound, assembled and terminated.

The Voltech DC1000 25A dc current supply will seamlessly integrate into the AT3600 or ATi test environment to provide up to 250A (10x DC1000 in parallel) of smooth, programmable dc bias current with minimal effect on the ac inductance measurement.

  • 25A programmable dc current
  • 250A with 10x DC1000
  • Works seamlessly with AT3600 or ATi
  • Unique “electronic inductor” design minimizes effect on the ac inducatnce measurement
  • Can be used on almost any LCR meter. Alternative for Agilent, Wayne Kerr and Chroma types.


Tests for the DC1000 and AT3600 / ATi

LSBX Inductance with External Bias (Series) 1nH to 1MH 1mV to 5V 20Hz to 3MHz 0.5%
LPBX Inductance with External Bias (Parallel) 1nH to 1MH 1mV to 5V 20Hz to 3MHz 0.5%
ZBX Impedance with external bias 1m Ω to 1MΩ 1mV to 5V 20Hz to 3MHz 0.2%
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Contact Voltech
USA 1-239-437-0494
EUR 44 1235 861173
ASIA 44-1235-364-001
or
Email Voltech
 
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