2-31 Bulletin 1491 Fuse Blocks 2 Bulletin 1491 • Fuse Blocks • Available from 30…600 A • Can be Used with Class H, J, and R Fuses TABLE OF CONTENTS Description Page Description Page Product Selection .................................... 2-32 Accessories ......................................... 2-33 Specifications ....................................... 2-34 Approximate Dimensions .............................. 2-35 Description These Bulletin 1491 Fuse Blocks have been designed for general purpose applications. The bases of these blocks, either phenolic or porcelain, are rugged in construction and provide ease in mounting and wiring. Conformity to Standards: Approvals: NEMA 512 CSA Certified (File No. LR 1234) UL Listed (File No. E 34648) 30 A Fuse Blocks with Spring-Type Fuse Clips and Self-Lifting Wiring Terminal Clamps 30 A Fuse Blocks with Spring-Type Fuse Clips Class R Rejection Feature and Self-Lifting Wiring Terminal Clamps 60 A Fuse Blocks with Spring-Type Fuse Clips and Tang-Type Connections on the Wiring Terminals 100 A Fuse Blocks with Wedge-Type Fuse Clamps and Tang-Type Connections on the Wiring Terminals
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2 - NEMA Disconnect Switches€¦ · NEMA 512 CSA Certified (File No. LR 1234) ... 250 1 2 3 — 1491-N121 1491 ... 2 - NEMA Disconnect Switches Rockwell Automation ...
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2-31
Bulletin 1491
Fuse Blocks2
Bulletin 1491
• Fuse Blocks• Available from
30…600 A• Can be Used with
Class H, J, and R Fuses
TABLE OF CONTENTSDescription Page Description Page
DescriptionThese Bulletin 1491 Fuse Blocks have been designed for general purposeapplications. The bases of these blocks, either phenolic or porcelain, are rugged inconstruction and provide ease in mounting and wiring.
Conformity to Standards: Approvals:NEMA 512 CSA Certified (File No. LR 1234)
UL Listed (File No. E 34648)
30 A Fuse Blockswith Spring-Type Fuse Clips
and Self-Lifting Wiring Terminal Clamps
30 A Fuse Blockswith Spring-Type Fuse ClipsClass R Rejection Feature
and Self-Lifting Wiring Terminal Clamps
60 A Fuse Blockswith Spring-Type Fuse Clipsand Tang-Type Connections
on the Wiring Terminals
100 A Fuse Blockswith Wedge-Type Fuse Clamps
and Tang-Type Connectionson the Wiring Terminals
Bulletin 1491
Fuse Blocks
2-32
Product Selection
Fuse Blocks
➊ These fuse blocks have porcelain bases.➋ For 2-pole applications use two of Cat. No. 1491-N321.➌ For 2-pole applications use two of Cat. No. 1491-N421.➍ For 2-pole applications use two of Cat. No. 1491-N521.➎ For 3-pole applications use three of Cat. No. 1491-N521.➏ For 2-pole applications use two of Cat. No. 1491-N621.➐ For 3-pole applications use three of Cat. No. 1491-N621.➑ For 2-pole applications use two of Cat. No. 1491-R621.➒ For 3-pole applications use three of Cat. No. 1491-R621.
1…30 A, 3-Pole, 250…600VCat. No. 1491-N125 (250V)Cat. No. 1491-N126 (600V)
Shipping Weight — 1 lb (0.45 kg)
Cat. No. 1491-R162
1…30 A, 250…600VCat. No. 1491-R125 (250V)Cat. No. 1491-R126 (600V)
Shipping Weight — 1 lb (0.45 kg)
Bulletin 1491
Fuse Blocks
2-36
Approximate Dimensions, Continued
Fuse Size 31…60 A
Dimensions are shown in inches (millimeters). Dimensions are not intended to be used for manufacturing purposes.
➊ Alternate Mounting Holes.➋ Dimension “A” must be held to insure fuse block rejection function.
Notes:
1. When fuse blocks are installed in a vertical plane, the block with the rejection numbers must be on the bottom.
2. When using Cat. No. 1491-N321, install fiber washers between fuse blocks and mounting plates. Discard extra screws, washers, and clampson multiple pole applications.
Fuse Size 101…200 ADimensions are shown in inches (millimeters). Dimensions are not intended to be used for manufacturing purposes.
➊ Dimension “A” must be held to insure fuse block rejection function.Note: When fuse blocks are installed in a vertical plane, the block with the rejection numbers must be on the bottom.