fuse block specifications - rockwellautomation.com · 2016-03-17 · rockwell automation...

Technical Data

Fuse Block SpecificationsBulletin Number 1491

Specifications

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You can view or download publications at http://www.rockwellautomation.com/literature/. To order paper copies of technical documentation, contact your local Allen-Bradley distributor or Rockwell Automation sales representative.

Topic Page

1491 Specifications this page

Fuse Size 1…30 A — Approximate Dimensions 2





Fuse Size 401…600 A — Approximate Dimensions 6…7

Electrical

UL Fuse Type Class H Class J Class R Class C Class CC

Maximum Fuse Cartridge Size 30…600 A 30…600 A 30…600 A 30…600 A 30 A

Maximum Voltage AC/DC 600V/250V 600V/250V 600V/250V 600V/250V 600V/250V

Thermal Current Rating 30…600 A 30…600 A 30…600 A 30…600 A 30 A

Maximu Short Circuit Prospective Fault Current 10 kA 200 kA 200 kA 100 kA 200 kA

Construction

Fuse Clips Tin-plated copper

Terminals Tin-plated copper

Fuse Block Base Phenolic or porcelain

Environmental

Ambient Temperature OpenEnclosedStorage

-20…+55 °C (-4…+131 °F)-20…+40 °C (-4…+104 °F)

-40…+65 °C (-40…+149 °F)Altitude (per IEC 947-5) 2000 m

Relative Humidity (per IEC 947-3) 90% @ 20 °C (68 °F) and 50% @ 40 °C (104 °F)

Resource Description

Industrial Automation Wiring and Grounding Guidelines, publication 1770-4.1 Provides general guidelines for installing a Rockwell Automation industrial system.

Product Certifications website, http://www.ab.com Provides declarations of conformity, certificates, and other certification details.

2 Rockwell Automation Publication 1491-TD001A-EN-P

1491 Fuse Blocks Approximate Dimensions

Dimensions are shown in inches (millimeters). Dimensions are not intended to be used for manufacturing purposes.

Fuse Size 1…30 A

2 Holes0.172 (4.37) Dia.

RejectionFeature

4 Terminals Combination of:Double Quick-Connect

(0.250x0.032) 20 A Max.,and Pressure Plate Screw

(10…32 Sems).(Ref.) Wire: #10 AWG Max. Cu Only

Cat. No. 1491-R162

1…30 A, Single Pole, 600V Cat. No. 1491-N161

Shipping Weight — 1 lb (0.45 kg)

Drill & Tap2 Holes for

#10…32 Screws

1…30 A, 2-Pole, 250V Cat. No. 1491-N122


Drill & Tap 4 Holesfor #10…32 Screws

1…30 A, 3-Pole, 250…600V Cat. No. 1491-N125 (250V) Cat. No. 1491-N126 (600V)


Drill & Tap2 Holes for

#10…32 Screws

9/32 (7.1) Dia.

Voltage[V]

Class H Class J

A B A B

250 2-1/8 (54.0) 3 (76.2) — —

600 2-3/8 (60.3) 5-3/4 (146.1) 2-3/8 (60.3) 3 (76.2)

�Alternate mounting holes.

Fuse Size[A]

MaximumVolts [V] Cat. No.

A‡±0.020

BRef.

1…30250 1491-R125 2.94 (74.68) 2-1/8 (53.97)

600 1491-R126 5.72 (145.29) 2-3/8 (60.33)

‡ 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.

Drill & Tap for#10…32 Screws

Rejection Members

1…30 A, 250…600V Cat. No. 1491-R125 (250V) Cat. No. 1491-R126 (600V)


3Rockwell Automation Publication 1491-TD001A-EN-P

Approximate Dimensions 1491 Fuse Blocks

Fuse Size 31…60 A

Drill & Tap 4 Holesfor #10…32 Screws

31…600 A, 3-Pole, 250…600V Cat. No. 1491-N226 (250V)


Cat. No. 1491-N266 (600V) Shipping Weight — 2 lb (0.91 kg)

Drill & Tap for#10…32 Screws

Rejection Members

31…60 A, 250…600V Cat. No. 1491-R226 (250V)

Shipping Weight — 1 lb (0.45 kg)Cat. No. 1491-R266 (600V)


Drill & Tap 4 Holesfor 1/4-20 Screws


Single Pole Application Use (1) of Cat. No. 1491-N321

Approximate Shipping Weight — 2 lb (0.91 kg)

3-Pole Application Use (3) of Cat. No. 1491-N321

Approximate Shipping Weight — Approx. 3 times wt. of 1-Pole




Voltage[V]

Class H Class J

A B A B

250 2-3/8 (60.3) 3-3/4 (95.3) — —

600 2-11/16 (68.3) 6-1/4 (158.8) 2-11/16 (68.3) 3-1/8 (79.4)

�Alternate mounting holes.

Fuse Size[A]


A‡±0.020

BRef.

31…60250 1491-R226 3.72 (94.49) 2-3/8 (60.33)

600 1491-R266 6.22 (157.99) 2-11/16 (68.26)

‡ Dimension “A” must be held to insure fuse block rejection function.




Voltage[V]

Class H Class J

A B A B

250 82.6 (3-1/4) 174.6 (6-7/8) — —

600 85.7 (3-3/8) 225.4 (8-7/8) 82.6 (3-1/4) 142.9 (5-5/8)

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 clamps on multiple pole

applications.




Fuse Size 61…100 ADrill & Tap 4 Holesfor 1/4-20 Screws

3-Pole Cat. No. 1491-N333

Approximate Shipping Weight — 3 lb (1.36 kg)

Voltage[V]

Class H Class J

A B A B

250 2-15/16 (74.6) 5-7/8 (149.2) — —

600 3-1/8 (79.4) 7-7/8 (200.0) 3 (76.2) 4-5/8 (117.5)

Drill & Tap for1/4-20 Screws

Rejection Members

13/32 max.(10.32 max.)

61…100 A, 250…600VCat. No. 1491-R333


Notes1. When fuse blocks are installed in a vertical plane, the block with the rejection numbers must be on the bottom.2. Fuse blocks with wedge type clamps (61 A and above) can be oriented to mount all fuses either to the left or to the right of fuse clamp centers.

Fuse Size[A] Maximum Volts [V] Cat. No.

A�±0.020

BRef.

61…100250

1491-R3335.88 (149.35) 2-15/16 (74.61)

600 7.88 (200.15) 3-1/8 (79.38)

�Dimension “A” must be held to insure fuse block rejection function.




Drill for 5/16-18 Screw

3-Pole Application Use Three of Cat. No. 1491-N521 Shipping Weight — 19 lb (8.6 kg)


4-Pole Application Use Four of Cat. No. 1491-N521


Voltage [V]

Class H or R Class J

A B A B

250 4-3/4 (120.7) 9 (228.6) — —

600 4-61/64 (125.8) 12 (304.80) 4-5/8 (117.5) 7-1/2 (190.5)

Fuse Size 101…200 A

Drill & Tap for5/16-18 Screw

Rejection Members

19/32 max.(15.1 max.)

101…200 A, 250…600V Cat. No. 1491-R433



Single Pole Cat. No. 1491-N521



2-Pole Application Use Two of Cat. No. 1491-N521 Shipping Weight — 6kg (13 lb)

Fuse Size[A]


A�±0.020

BRef.

101…200250

1491-R4337.25 (184.15) 4-3/16 (106.36)

600 9.75 (247.60) 4-5/16 (109.54)



Note: When fuse blocks are installed in a vertical plane, the block with the rejection numbers must be on the bottom.




Drill & Tapfor 5/16-18

Screws

Rejection Members

1/4 max.(6.35 max.)

201…400 A, 250…600V Cat. No. 1491-R523


Fuse Size [A]MaximumVolts [V] Cat. No.

A�±0.020

BRef.

201…400250

1491-R5239 (228.60) 4-3/4 (120.70)

600 12 (304.80) 4-61/64 (125.81)



Single Pole 600 A Terminations Only

Cat. No. 1491-N621 Shipping Weight — 6 lb (2.7 kg)

Notes1. When fuse blocks are installed in a vertical plane, the block with the rejection numbers must be on the bottom.2. Fuse blocks with wedge type clamps (61 A and above) can be oriented to mount all fuses either to the left or to the right of fuse clamp centers.

Voltage [V]

Class H or R Class J

A B A B

250 8-1/8 (206.38) 4-5/8 (117.47) — —

600 11-1/8 (282.57) 7-5/8 (193.68) 6 (127.00) 2-1/2 (63.50)





401…600 A250V

401…600 A600V

401…600 A250V

401…600 A600V

4-Pole 400 A Terminations Only

Cat. No. 1491-N621 (Amt. 4) Shipping Weight — 21 lb (9.5 kg)

Fuse Size 401…600 A, Continued

401…600 A250V

401…600 A600V

401…600 A250V

401…600 A600V



Cat. No. 1491-N621 (Amt. 2) Shipping Weight — 11 lb (5 kg)

401…600 A250V

401…600 A600V


401…600 A250V

401…600 A600V


Cat. No. 1491-N621 (Amt. 3) Shipping Weight — 16 lb (7.3 kg)


Allen-Bradley, Rockwell Software, Rockwell Automation, and LISTEN. THINK. SOLVE are trademarks of Rockwell Automation, Inc.

Trademarks not belonging to Rockwell Automation are property of their respective companies.

Publication 1491-TD001A-EN-P - August 2014 Copyright © 2014 Rockwell Automation, Inc. All rights reserved. Printed in the U.S.A.

Important User Information

Read this document and the documents listed in the additional resources section about installation, configuration, and operation of this equipment before you install, configure, operate, or maintain this product. Users are required to familiarize themselves with installation and wiring instructions in addition to requirements of all applicable codes, laws, and standards.

Activities including installation, adjustments, putting into service, use, assembly, disassembly, and maintenance are required to be carried out by suitably trained personnel in accordance with applicable code of practice.

If this equipment is used in a manner not specified by the manufacturer, the protection provided by the equipment may be impaired.

In no event will Rockwell Automation, Inc. be responsible or liable for indirect or consequential damages resulting from the use or application of this equipment.

The examples and diagrams in this manual are included solely for illustrative purposes. Because of the many variables and requirements associated with any particular installation, Rockwell Automation, Inc. cannot assume responsibility or liability for actual use based on the examples and diagrams.

No patent liability is assumed by Rockwell Automation, Inc. with respect to use of information, circuits, equipment, or software described in this manual.

Reproduction of the contents of this manual, in whole or in part, without written permission of Rockwell Automation, Inc., is prohibited.

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fuse block specifications - rockwellautomation.com · 2016-03-17 · rockwell automation...

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