Flameproof Electrical Motors

Low voltage IEC motors for Hazardous Areas

4(5)KTC series

Benefits

Highest degree of safety and reliability
Certified for gas groups IIB and IIC
Modular design, which allows execution of all IEC forms and different positions/rotations of connection box
Ex db or Ex db eb cast iron frame and connection box
ATEX, IECEx, Kosha ...
Wide ingress protection range: IP55 up to IP66
Suitable for Ambient Temperatures from -50°C to +85°C
Temperature class T4 as a standard, T5 & T6 also available on request

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Marking

ATEX:

II 2G Ex db IIB, IIC T4 Gb (T5 & T6 on request)
II 2G Ex db eb IIB, IIC T4 Gb (T5 & T6 on request)
II 2D Ex tb IIIC T135°C Db

IECEx:

Ex db IIB, IIC T4 Gb (T5 & T6 on request)
Ex db eb IIB, IIC T4 Gb (T5 & T6 on request)
Ex tb IIIC T135°C Db

Ingress protection

Standard IP55

On request up to IP66

Ambient temperature

Standard -20 °C up to +40 °C
On request from -50 °C up to +85 °C

Ambient Temperature

Standard: -20 °C up to +40 °C
On request: -50 °C up to +85 °C

Certification

ATEX / frame sizes 71-225
- EN
ATEX / frame size 250
- EN
ATEX / frame size 280-315
- EN
IECEx / frame sizes 71-225
- EN
IECEx / frame size 250
- EN
IECEx / frame size 280
- EN
IECEx / frame size 315
- EN
KOSHA / frame sizes 71-160
- KR
KOSHA / frame sizes 180-225
- KR
EAC
- RU
CCC
- CN

Description

Explosion-protected electric motors are used in industrial plants with a potentially explosive atmosphere, containing inflamable fumes (vapours) or gases (i.e. chemical industry, oil refineries,...) as well as in mines where methane is present. The enclosures of electric motors are designed to be "flameproof" according to EN 60079-0 (IEC 60079-1). The terminal boxes could also be in "flameproof" design or also in "increased safety" design according to EN 60079-7 (IEC 60079-7).

These are three-phase asynchronous electric motors with shot-circuit rotor, according to the EN 60079-0, EN 600079-1, EN 600079-7 and EN 60079-31 standards.