SV9674.790 Rittal Pressure stopper for roof plates

Why Choose the Rittal SV9674.790 Pressure Stoppers for Roof Plates?

The Rittal SV9674.790 pressure stoppers are designed to convert a compatible IP55 roof plate into a roof plate with pressure relief functionality. Intended for Rittal industrial enclosure and power distribution systems, they provide a controlled pressure relief solution for installations where internal arc safety and personnel protection are important considerations.

The pressure relief function is used to support compliance with personnel protection requirements for arc-resistant switchgear according to IEC/TR 61641. When the pressure stoppers are correctly fitted to the roof plate, the resulting enclosure arrangement achieves a protection category of IP54.

Manufactured from durable polyamide, the SV9674.790 is supplied in a pack of 4 pressure stoppers together with 4 warning stickers. Rittal specifies that each roof plate requires 2 pressure stoppers and 1 warning sticker, allowing one pack to provide pressure stoppers for two compatible roof plates.

Key Advantages

• Converts a compatible IP55 roof plate into a pressure-relief roof plate.
• Supports personnel protection requirements for arc-resistant switchgear.
• Designed with reference to IEC/TR 61641 internal arc requirements.
• Achieves a resulting IP54 protection category when correctly installed.
• Durable polyamide construction for industrial enclosure applications.
• Only 2 pressure stoppers are required per roof plate.
• Supplied as a pack of 4 pieces with warning stickers.

Key Features

• Rittal SV pressure stoppers for roof plates.
• Designed for conversion of IP55 roof plates.
• Provides a dedicated pressure relief function.
• Supports arc-resistant switchgear configurations according to IEC/TR 61641.
• Resulting protection category after installation: IP54.
• Manufactured from polyamide.
• 2 pressure stoppers and 1 warning sticker required per roof plate.
• Supplied with 4 warning stickers.
• Packaging unit of 4 pieces.

Pressure Relief for Arc-Resistant Switchgear

Internal arc faults can create a rapid increase in pressure inside a switchgear enclosure. The Rittal SV9674.790 enables a compatible roof plate to incorporate a pressure relief function, forming part of an enclosure configuration intended to manage the effects of internal pressure during an arc event.

Rittal specifies the pressure relief function as an important element for compliance with personnel protection requirements associated with arc-resistant switchgear under IEC/TR 61641. The precise arc-resistance limits depend on the busbar system and overall switchgear configuration being used, so the pressure stoppers form one component within the complete tested assembly.

Typical Applications

• Rittal industrial enclosure roof plates.
• Ri4Power low-voltage power distribution assemblies.
• Switchgear requiring roof-mounted pressure relief.
• Arc-resistant low-voltage switchgear configurations.
• Industrial power distribution cabinets.
• Busbar and switchgear assemblies.
• Electrical panel-building applications.
• Enclosures requiring conversion from IP55 to pressure-relief functionality.