Learn About Our Medium and High Voltage Fuses

Protection of small power transformers, PTs/SSTs, and capacitor banks

Medium and high voltage power fuses provide a reliable and economical means of protecting small to medium size power transformers, potential transformers, station service transformers, and capacitor banks. The lower installed cost of a power fuse, it’s compact size, and the fact that no auxiliary equipment (batteries, motor drives, protective relays, etc.) is required make it the ideal choice for applications where cost and space are key concerns and infrequent operation is expected.

The robust construction of Southern States Type BP, BPA, and HPA power fuses provide 3 full fault operations before tube replacement is required, a significant savings in total life cost vs. other power fuses which require tube replacement after each fault regardless of fault magnitude.

Southern States power fuses and power fuse kits are available from 7.2kV through 169kV with ratings up to 400 A and interrupting ratings to 40 kA RMS Asymmetrical. Distribution Fuse links are also offered at 27kV and below.

HPA 161 kV horizontal underhung power fuses

BPA_69kV

HPA 161 kV horizontal underhung power fuses

BPA

BPA 46 kV 100 A power fuses

45 degree underhung HPA 115 kV power fuses

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Extra Large Operating Eye
High Strength, Fiberglass Tubes
Reverse Loop, Amplitact® Contacts On Jaw & Hinge Ends
Fully Enclosed Contacts
Self-Locking Hinge Assembly
Snubber To Cushion Impact When Holder Swings To Open Position After Fuse Operation
Holder Removal Socket Accommodates Standard Or Bayonet Head Hookstick

	Style Mounting	Voltages Offered	Interrupting Capacity (RMS Asymmetrical)	Ampere Rating
BP	Vertical	8.25kV - 72.5kV	8 ka - 12 kA	100A and 200A
BPA	Vertical 45° Underhung Horizontal Underhung	8.25kV - 72.5kV	8 kA - 20 kA	100A and 200A
HPA	Vertical 45° Underhung Horizontal Underhung	8.25kV - 169kV	12.5 kA - 40 kA	100A, 200A, 300A, and 400A