Switch Disconnectors

3NJ4, 3NJ5 In-Line Fuse Switch Disconnectors up to 2000 A

Introduction

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Siemens LV 10 · 2014

Overview of all components and accessory parts: 3NJ4/3NJ5 in sizes 1 to 3

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Benefits

Parking position

For maintenance e.g. the fuse carriers of the 1-pole switchable

in-line fuse switch disconnectors of sizes 1 to 3 and the 3-pole

switchable in-line fuse switch disconnectors of size 00 can be

mounted after being turned by 180° (fuse facing outwards).

This results in the following advantages:

• Visible disconnection point

• Depot for fuse links (parking position)

• No opportunity for mistakes when replacing the

fuse links

• Additional touch protection in the vicinity of the lyre-shaped

contacts

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Application

3NJ41 and 3NJ56 single-pole and 3-pole in-line fuse switch

disconnectors can be installed in low-voltage distribution

boards, substations and cable distribution cubicles.

Note:

For 1-pole switchable fuse switch disconnectors the following

applies acc. to EC/EN 60947-3:

These devices are intended for

power distribution systems that may require the switching and/or

disconnection of individual outer conductors. They should not

be used for switching the primary circuits of 3-phase equipment.

Terminal strip

Distance

compensation

Auxiliary switch

Flat connector

Stud terminal

V terminal

Box terminal

Cover

3NJ4/5 fuse switch

disconnector

Basic device size 1/2/3

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