01 Transformer & system
Transformer nameplate, system voltage/frequency and a circuit diagram, if available.
APPLICATION SELECTION
Transformer Protection Switching and Fuse Coordination
Buying a switch-fuse combination or replacing its insulating parts? Choose the purchase scope first, then provide transformer data and the existing protection arrangement.
1. Choose what you need to source
Open a product or category to review its drawings and listed specifications. These are selection starting points, not a complete system configuration.
Switch-fuse assemblies
For a combined switching and protection arrangement: compare the listed assemblies and specify the fuse, mechanism and installation requirements.
View products & drawings
Fuse housings & insulating parts
For housing or plug replacement: compare dimensions, contacts and access space. Insulating parts do not replace the fuse protection function.
View products & drawings
Isolation & earthing accessories
For associated installation parts: identify the required function and the mechanical connection to the selected assembly.
View products & drawings2. Check these details before selecting a model
Transformer power or fuse current alone is not enough to select a combination. Protection coordination depends on the complete circuit and the selected devices.
02 Protection arrangement
Existing fuse model and curves, upstream/downstream protection and trip or striker interfaces.
03 Installation & quantity
Cabinet dimensions, mounting and replacement access; specify the parts and quantities needed.
3. Tell us about your project
Start with the information you have; you do not need to complete every technical detail to inquire. Send drawing files to the email address below.
sales@tungarc.com
Selection questions
Can a fuse be replaced by any fuse with the same current rating?
Check characteristics, dimensions, striker and combination requirements. Current rating alone is insufficient for replacement.
Does an enquiry establish an approved protection scheme?
An enquiry defines requirements and supply configuration. Protection coordination still needs assessment using the complete system information.
Further selection guidance
For projects that need a more detailed specification.