Switch Disconnectors

3KA, 3KE Switch Disconnectors up to 1000 A

Introduction

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Siemens LV 10 · 2014

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Overview

For the 3KA switch disconnectors, complete kits for standard and

EMERGENCY-STOP application are available for installation in the

side and rear panels of control cabinets.

A changeover operating mechanism is available for the use of two

switch disconnectors of the 3KE series as load changeover

switches.

A switch coupling permits simultaneous switching of two

3KE switch disconnectors with identical or different rated opera-

tional currents.

Identical accessories for 3KA switch disconnectors and for 3KL

and 3KM switch disconnectors with fuses simplify stock keeping.

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Application

3KA and 3KE switch disconnectors are used as main control,

EMERGENCY-STOP, maintenance and transfer switches in dis-

tribution boards for residential and non-residential buildings as

well as industrial switchgear. As three and four-pole versions,

they ensure making and breaking of the specified rated current

under load. At the same time, they constitute a safety isolating

function and isolating distance in all low-voltage circuits.

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

requirements of IEC 60947-1, IEC 60947-3 and VDE 0660

Part 107. Switch disconnectors in the type-tested 8HP molded-

plastic distribution board enclosure (degree of protection IP65)

are available for use as safety switches.

Additional data, see chapter 17 "Distribution Boards"

and chapter 19 "8WH2 Spring-Loaded Terminals".

4th pole (optional, only for 3KA)

All components from the switch to the actuator are provided with

non-interchangeability features.

IP20 terminal cover (Operator side)

3K switch disconnector

Arcing contacts (only for 3KE)

Coupling driver

Extension shaft

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

EMERGENCY-STOP version (red).

8UC7 door-coupling rotary operating mechanism in standard version

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

Auxiliary switch (3SB for 3KA; 3KX for 3KE)

NSE0_01931d