SXD Slip Ring Series

Explosion-Proof Slip Rings

SXD series Slip Rings are suitable to be used in potentially explosive atmospheres.

The essential requirements for safety in hazardous areas are established in European Directives 2014/34/UE of 26 February 2014. SXD is the Explosion Proof Slip Ring for your applications in zones with the presence of flammable dust.

Specification

The areas exposed at explosion risk are classified according to the standard EN 60079-10, while the technical requirements of the electrical systems in the classified areas are given by EN 60079-31 standard. Technical protection for the electrical equipment according to the IEC standards 60079-0 and IEC 60079-1.

SXD II 2D Ex tb IIIC IP65 T 80°C

System type: group II surface system
Category: 2D elevate protection, zone 21 and zone 22 use areas with presence of inflammable dusts
Type of protection mode: Ex tb - dustproof
Type of dust: IIIC - conductive dusts
Protection Degree: IP65
Temperature class: T 80 °C, defines the maximum temperature of the surface.

GENERAL CHARACTERISTICS

Models: SXD35, 50, 70, 91 available in blind or through hole version (SXD35 only blind)
Poles function: power up to 40 A, signals and data transmission
Max. voltage: 400 V AC – 160 V DC
Max current: 40 A
Protection degree: IP 65
Max RPM: 150 rpm
Mounting position: Vertical / Horizontal
Working temp.: - 20 °C / + 40 °C
Relative humidity: 30% to 60%

FAQ

What are the requirements for explosion-proof Slip Rings?

To meet the requirement for explosion-proof, a Slip Ring must assure the enclosure is able to contain any explosion originating within its housing and prevent sparks from within its housing from igniting vapors, gases, dust, or fibers in the air surrounding it.

How can I know if the slip ring is suitable for my area according to ATEX directive?

The classification of dangerous areas is carried out following the recommendations suggested by EN 1127-1, EN 60079-10-1 (for explosive gas) and EN 60079-10-2 (for explosive dust), which provide elements for the division of dangerous areas into three zones, depending on the frequency and time of presence of the explosive substance. For dust-Ex we have zone 20, 21 and 22. Zone 20 is an area in which an explosive atmosphere is present in the form of a cloud of combustible dust in the air permanently or for long periods > 1000 hours/year. Zone 21 is an area in which the formation of an explosive atmosphere in the form of a cloud of combustible dust in the air is possible during normal activities in a quantity comprise between 10 and 1000 hours/year. Zone 22 is an area in which the formation of an explosive atmosphere in the form of a cloud of combustible dust in the air is not probable during normal activities and, if it occurs, is only for a short time, less than 10 hours/year. SXD is suitable for zone 21 and 22.

Which is the meaning of Category 2D in ATEX description?

Category 2D identifies products with a high level of protection for gas. The slip rings of category 2D are suitable to be used instead of 3D products that only guarantee a normal level of protection.