Switch Disconnectors

3KL Switch Disconnectors with Fuses up to 800 A

Introduction

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Siemens LV 10 · 2014

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Overview

All switch disconnectors feature double contact interruption and

an isolating distance. As a result, the fuses of the switch discon-

nectors are de-energized in the OFF position.

Generally all 3K.5 switch disconnectors can be secured to the

shaft with padlock against unauthorized reclosing.

Identical accessories for 3KA switch disconnectors and 3KL and

3KM switch disconnectors with fuses simplify stock keeping.

Please inquire about a special version with reduced values that

is particularly resistant to atmospheres high in sulfur, e.g. in the

paper and cellulose processing industries.

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Application

3KL switch disconnectors with fuses protect against overload

and short-circuits as main control and EMERGENCY-STOP

switches of switchgear assemblies, distribution boards, power

supply and motor outgoing feeders.

In conjunction with Siemens SITOR semiconductor fuses, they

are also used in UPS systems, frequency converters and capac-

itor control systems.

All 3K switch disconnectors are climate-proof and meet the

requirements of IEC 60947-1, IEC 60947-3 and

VDE 0660 Part 107.

3KL basic device

Fuses, optionally BS 88 or LV HRC fuses

Coupling driver

Extension shaft

Single-pole terminal cover from 63 A to 630 A, IP20

(vertical to operator side)

Terminal cover, IP20 (vertical to operator side)

Standard products from the Siemens 3SB1 range

are used as auxiliary switches.

8UC9 knob for fixed mounting in standard version (black) or

EMERGENCY-STOP version (red), or

All components from the switch to the actuator are provided with

non-interchangeability features.

8UC7 door-coupling rotary operating mechanism in standard

version (ti-grey) or EMERGENCY-STOP version (red/yellow)

Optional

4th pole (optional)

NSE0_01557f