Constant Voltage Transformer Characteristics

The typical ferro voltage regulator has the following characteristics:

Size (kVA):30 VA up to 25 kVA
Nominal Voltages:+10% to -20% (varies by manufacturer)
Input Voltage Range:+10% to -20% (varies by manufacturer)
Output Regulation:+/-1% to +/-3% (varies by manufacturer)
Phase:Single phase application only
Voltage Step Up/Down:Yes
Cooling Media:Air
Location:Indoor
Efficiency:Up to 92% (see Disadvantages)

HOT & COSTLY

Should

Ferros

Be

Retired

?

Ferroresonant transformers typically operate at efficiencies of only 75% to 80%, and frequently operate at efficiencies as low as 50%. Modern electronic voltage regulators operate at efficiencies of 99% … at all times.

A case can be made for replacing all ferros, no matter how new.

Should Ferros Be Retired?

Ferroresonant transformers typically operate at efficiencies of only 75% to 80%, and frequently operate at efficiencies as low as 50%. Modern electronic voltage regulators operate at efficiencies of 99% … at all times.

A case can be made for replacing all ferros, no matter how new.