2 - nema disconnect switches€¦ · nema 512 csa certified (file no. lr 1234) ... 250 1 2 3 —...

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

Product Selection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-32Accessories . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-33

Specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-34Approximate Dimensions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-35

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.

Fuse Size(A)

MaximumVoltage (V)

No. ofPoles

Class CCCat. No.

Class HCat. No.

Class JCat. No.

Class RCat. No.

Class C(HRC Form II)

Cat. No.

0…30

250123

—1491-N1211491-N1221491-N125

———

1491-R125—

600123

—1491-R162

—

1491-N161—

1491-N126

——

1491-N126

——

1491-R126

——

1491-E126

31…60

250 3 — 1491-N226 — 1491-R226 —

600 3 — 1491-N266 1491-N266 1491-R266 1491-E126

61…100 250…600123

—1491-N321 ➊

➋

1491-N333

1491-N321 ➊

➋

1491-N333

——

1491-R333

——

1491-E333

101…200 250…600123

—1491-N421

➌

1491-N433

1491-N421➌

1491-N433

——

1491-R433

——

1491-E433

201…400 250…600123

—1491-N521

➍

➎

1491-N521➍

➎

1491-R523——

1491-E521——

401…600 250…600123

—1491-N621

➏

➐

1491-N621—➐

1491-R621➑

➒

—

Specifications — -34Approximate Dimensions — Page 2-35

2-33

Bulletin 1491

Fuse BlocksAccessories

Fuse Clip KitsIncludes six clips and mounting hardware

Lugs

➊ All terminals of the 30 A switches are furnished with self-lifting pressure plate connectors as standard.

Fuse ClassFuse Clip Rating (A)

Cat. No.250V 600V

H 30 — 1401-N41H, J 60 30 1401-N42H, J — 60 1401-N43H, J 100 100 1401-N44H, J 200 200 1401-N45H, J 400 400 1401-N46 ➊

R 30 — 1401-N50R 60 30 1401-N51R — 60 1401-N52R 100 100 1401-N53R 200 200 1401-N54R 400 400 1401-N55

Description

For Use withCat. No.

Cat. No.Lug Connectors (3 per package)

DisconnectSize (A)

Wire Size

30 #14…#8 AWG Wire

1491 Fuse Blocks

➊

60 #14…#4 AWG Wire 1494R-N1

100 #8…#1/0 AWG Wire 1494R-N2

200 #6…#4/0 AWG Wire 1494R-N3

400 2 of #1/0…350 MCM Wire 1494R-N10

600 2 of #1/0…350 MCM Wire 1494R-N11

Cat. No. 1494R-N3

Bulletin 1491

Fuse Blocks

2-34

Specifications

Fuse Blocks

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

CSA Fuse Type HRCI-C HRCI-Misc. HRCI-H HRCI-J HRCI-R

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

Maximum VoltageAC 600V 600V 600V 600V 600V

DC 250V 250V 250V 250V 250V

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

Maximum Short Circuit Prospective FaultCurrent

100 kA 200 kA 10 kA 100 kA 200 kA

MechanicalDegree of Protection IP00 IP00 IP00 IP00 IP00

Terminal Capacitymm2 10 6 10 10 10

AWG #8 (–500 MCM) #10 #8 (–500 MCM) #8 (–500 MCM) #8 (–500 MCM)

ConstructionFuse Clips Tin-plated copper alloy

Terminals Tin-plated copper alloy

Fuse Block Base Phenolic or Porcelain

Environmental

Ambient TemperatureOpen –20…+55°C (–4…+131°F)Enclosed –20…+40°C (–4…+104°F)Storage –40…+65°C (–40…+149°F)

Altitude (per IEC 947-5) 2000m

Relative Humidity (per IEC 947-3) 90% at 20°C and 50% at 40°C

Product Selection — Page 2-32

2-35

Bulletin 1491

Fuse BlocksApproximate Dimensions

Fuse Size 1…30 ADimensions 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.

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

Voltage(V)

Class H Class J Fuse Size(A)

MaximumVolts (V)

Cat. No.A ➋

±0.020B

Ref.A B A B

250 2-1/8 (54.0) 3 (76.2) — —1…30

250 1491-R125 2.94 (74.68) 2-1/8 (53.97)

600 2-3/8 (60.3) 5-3/4 (146.1) 2-3/8 (60.3) 3 (76.2) 600 1491-R126 5.72 (145.29) 2-3/8 (60.33)

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

Shipping Weight — 1 lb (0.45 kg)

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


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


Cat. No. 1491-R162

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


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.

Voltage(V)

Class H Class J Fuse Size(A)

MaximumVolts (V) Cat. No. A ➋

±0.020B

Ref.A B A B250 2-3/8 (60.3) 3-3/4 (95.3) — —

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

600 2-11/16 (68.3) 6-1/4 (158.8) 2-11/16 (68.3) 3-1/8 (79.4) 600 1491-R266 6.22 (157.99) 2-11/16 (68.26)

Voltage (V)Class H Class J

A B A B250 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)

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


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

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


Cat. No. 1491-R266 (600V)Shipping Weight — 2 lb (0.91 kg)

Single Pole ApplicationUse One of Cat. No. 1491-N321

Approximate Shipping Weight — 2 lb (0.91 kg)

2-Pole ApplicationUse Two of Cat. No. 1491-N321

Approximate Shipping Weight — Approx. 2 times wt. of 1-Pole

4-Pole ApplicationUse Four of Cat. No. 1491-N321


3-Pole ApplicationUse Three of Cat. No. 1491-N321


2-37

Bulletin 1491

Fuse BlocksApproximate Dimensions, Continued


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

Notes:


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 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)

Fuse Size (A) Maximum Volts (V) Cat. No.A ➊

±0.020B

Ref.

61…100250

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

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

3-PoleCat. No. 1491-N333

Approximate Shipping Weight — 3 lb (1.36 kg)

61…100 A, 250…600VCat. No. 1491-R333


Bulletin 1491

Fuse Blocks

2-38



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.

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)

101…200 A, 250…600VCat. No. 1491-R433


Fuse Size(A)

MaximumVolts (V)

Cat. No.A ➊

±0.020B

Ref.

101…200250

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

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

Single PoleCat. No. 1491-N521


2-Pole ApplicationUse Two of Cat. No. 1491-N521Shipping Weight — 6kg (13 lb)

3-Pole ApplicationUse Three of Cat. No. 1491-N521Shipping Weight — 19 lb (8.6 kg)

4-Pole ApplicationUse Four of Cat. No. 1491-N521


2-39

Bulletin 1491

Fuse BlocksApproximate Dimensions, Continued


Fuse Size 401…600 A

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

Notes:


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)MaximumVolts (V)

Cat. No.A ➊

±0.020B

Ref.

201…400250

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

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

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)

201…400 A, 250…600VCat. No. 1491-R523


Single Pole600 A Terminations Only

Cat. No. 1491-N621Shipping Weight — 6 lb (2.7 kg)

Bulletin 1491

Fuse Blocks

2-40


Fuse Size 401…600 A, ContinuedDimensions are shown in inches (millimeters). Dimensions are not intended to be used for manufacturing purposes.

2-Pole400 A Terminations Only

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


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


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

2 - nema disconnect switches€¦ · nema 512 csa certified (file no. lr 1234) ... 250 1 2 3 —...

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