3KA, 3KE, 3LD Switch Disconnectors

3LD Main Control and EMERGENCY-STOP Switches up to 125 A

General data

17/14

Siemens LV 1 · 2007

* You can order this quantity or a multiple thereof.

■Overview

■Application

The 3LD switches are used for switching main and auxiliary

circuits, but also for switching induction motors and other loads

during maintenance and repair work.

They are manually operated switch disconnectors according to

IEC 60947-3/VDE 0660 Part 107 (EN 60947-3) and comply with

the conditions for switch disconnectors.

The 3LD can be used as

• ON-OFF switch

• EMERGENCY-STOP switch

• Main control switch according to EN 60204-1

In EN 60204-1 (VDE 0113 Part 1), main control switches are

called "mains isolating devices", while EMERGENCY-STOP

switches are termed "devices for emergency shutdown".

Maintenance personnel can protect themselves against

unauthorized startup with padlocks (up to three can be fitted).

3LD main control and EMERGENCY-STOP switches are

approved according to UL 508.

4

7

6

5

3

2

1

3

8

1

4th contact (N conductor)

2

N or PE/ground terminal, continuous

3

Auxiliary switch 1 NO + 1 NC

4

Rotary operating mechanism, red/yellow

5

Rotary operating mechanism, black

6

Front plate, English/German

7

Terminal cover, three-pole

8

Terminal cover, one-pole

LV1_17.book Seite 14 Freitag, 26. Januar 2007 11:33 11

© Siemens AG 2007