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Industrial Control Transformers
Fuse Protection
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Fuse Protection Options
Protection Example Factory Installed Option(s) Field Installed Option(s)
Line-to-Line Primary and Secondary 480 to 120/240 (Voltage Code D31) Not available
9070FB2A(B) - Primary
9070S22A(B) - Secondary
Line-to-Line Primary and Line-to-Neutral Secondary 480 to 120 (Voltage Code D1) 9070 Type TF or 9070 Type EOF 9070 Type T: 9070FB3A or 9070FB3B
Line-to-Line Primary and No Secondary 480 to 24 (Voltage Code D2)
9070 Type TF with R02 suffix or
9070 Type EOF with R02 suffix
9070 Type T: 9070FB2A or 9070FB2B
No Primary and Line-to-Line Secondary 480 to 120/240 (Voltage Code D31)
9070 Type T or 9070 Type EO
with S22 Suffix
9070 Type T: 9070S22A or 9070S22B
Line-to-Neutral Primary and Line-to-Line Secondary 277 to 120/240 (Voltage Code D60)
9070 Type TF with R12 suffix or
9070 Type EOF with R12 suffix
9070 Type T: 9070R12A or 9070R12B
No Primary and Line-to-Neutral Secondary 480 to 120 (voltage Code D1)
9070 Type T with S12 suffix or
9070 Type EO with S12 suffix
Secondary Fuse Block - midget
fuses
9070 Type T with SF25 suffix
Secondary Fuse Block - glass
type fuses
9070 Type T with SF41 suffix
Secondary Fuse Clips mounted
on terminal block
9070 Type T:
Midget type fuse block: 9070FB1A or
9070FB1B
Midget type fuse clips: 9070SF41A or
9070SF41B (Limited to single
secondary only)
Glass type fuse block: 9070SF25A or
9070SF25B
Glass type fuse holder: 9070AP2
Side mounted 2-inch x 9/16-inch:
9070AP1
9070 Type EO:
Side mounted 2-in. x 9/16-in.:
9070AP1
Glass type fuse holder: 9070AP2
Midget type fuse clips: 9070AP3 or
9070AP4
Line-to-Neutral Primary and Line-to-Neutral
Secondary
277 to 120 (Voltage Code D4)
9070 Type TF with R11 suffix or
9070 Type EOF with R11 suffix
9070 Type T: 9070R11 or 9070R11
Line-to-Neutral Primary and No Secondary 277 to 24 (Voltage Code D24)
9070 Type TF with R01 suffix or
9070 Type EOF with R01 suffix
9070 Type T: 9070R01A or 970R01B
Description of Accessory Keys
Catalog Number
Accessory Key I Accessory Keys II, III, IV Description
9070FB2A 9070FB2B
Two pole fuse block with rejection clips for primary fusing, field mounted on terminal board via Fingersafe
cover, 1-1/2-inch x 13/32-inch midget fuse
9070R10A 9070R10B
One pole fuse block with rejection clips for primary fusing, field mounted on terminal board via fingersafe
cover, 1-1/2-inch x 13/32-inch midget fuse
9070FB3A 9070FB3B
Three pole fuse block, two poles with rejection clips for primary fusing and one pole standard clips for
secondary fusing, field mounted on terminal board via Fingersafe cover, 1-1/2-inch x 13/32-inch midget fuse
9070R11A 9070R11B
Two pole fuse block, one pole with rejection clips for primary fusing and one with standard clips for secondary
fusing, field mounted on terminal board via Fingersafe cover, 1-1/2-inch x 13/32-inch midget fuse
9070R12A 9070R12B
Three pole fuse block,one pole with rejection clips for primary fusing and two poles standard clips for
secondary fusing, field mounted on terminal board via Fingersafe cover, 1-1/2-inch x 13/32-inch midget fuse
9070FB1A 9070FB1B
One pole fuse block with standard clips for secondary fusing, field mounted on terminal board via Fingersafe
cover, 1-1/2-inch x 13/32-inch midget fuse
9070S22A 9070S22B
Two pole fuse block with standard clips for secondary fusing, field mounted on terminal board via Fingersafe
cover, 1-1/2-inch x 13/32-inch midget fuse
9070SF41A 9070SF41B
Secondary Fuse Clips mounted on terminal board, prevents the use of Fingersafe covers, only field
installable on single voltage secondary units
1-1/2-inch x 13/32-inch midget fuse
9070SF25A 9070SF25B
One pole fuse block with standard clips for secondary fusing, field mounted using Fingersafe cover notches,
prevents the use of fingersafe covers,
1-1/4-inch x 1/4-inch glass fuse
9070AP1 9070FB
One pole fuse block with standard clips for secondary fusing, field mounted next to transformer using same
mounting hardware, 2-inch x 9/16-inch fuse
907AP2 9070FB
One pole twist fuse block with standard clips for secondary fusing, field mounted next to transformer using
same mounting hardware,
1-1/4-inch x 1/4-inch glass fuse