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Approvals & Standards

IEC 60282-1

  • VDE 0670 part 4
  • DIN 43625

Key features & benefits

Mersen HV fuse-links have been used for reliable protection in high-voltage switchgear and controlgear and high-voltage systems for decades.
Limitor®-PT HV fuses are back-up fuses as defined in the IEC 60282-1 standard and dedicated to protect transformers against the effects of short-circuit currents.
To guarantee high quality, Mersen uses the best materials: fuse-elements are in pure silver, caps are in copper coated with silver and bodies are in ceramic.

More specifications


HV Transformer protection

Product Specifications

Item Number


Catalog number


Item Description (ERP)

H 1759P BCKUP T 367-56/25  


HV fuse, DIN, VDE, 17,5kV 25A, 367mm, 45mm, striker+Power Dissipation Control  

EAN/UPC code


Rated voltage AC IEC

17.5   kV

Rated current

25   A

Fuse size

d=56mm, L=367mm  



Clearing I2t At Rated Voltage

6   kA²s

AC Max I.R./Breaking Capacity: I1

63   kA

Minimum breaking capacitiy (MBC)

93   A

Power Dissipation at Rated Current Value

73   W

Indication System


Indication System Type


Contact materials

Silver-Plated Copper  

Connection/Terminal Type


Body/Insulating Material


Product Weight

2.2   kg

Product Diameter

56   mm

Product Length

433   mm

Sell Pack Quantity

1   EACH

Sell Pack Weight

2.2   kg

Sell Pack Width

100   mm

Sell Pack Length

560   mm

Sell Pack Height

95   mm