Onesto 275V 10kA AC 2 Pole Surge Arrestor

Product Overview

The Onesto 275V 10kA AC 2 Pole Surge Arrestor is a DIN rail surge protection device for use in compatible AC electrical installations. Model BY7-10/2-275 provides a two-pole configuration with a maximum continuous operating voltage of 275 V and a maximum surge current rating of 10 kA.

Key Features

• Two-pole configuration for installations requiring a two-pole surge protection device.
• 275 V maximum continuous operating voltage for selection against the electrical system requirements.
• 10 kA maximum surge current rating.
• DIN rail mounting suits compatible distribution board layouts.
• Indication window provides a visual device status check.

Applications

• Surge protection in compatible AC distribution boards.
• Domestic and commercial electrical installations where the specified ratings and configuration meet the installation design.
• AC circuits associated with backup power installations, subject to the electrician’s system design.

Why Choose This Product?

This Onesto surge arrestor provides a two-pole option in the existing Onesto protection range, with DIN rail mounting and a visual indication window for practical distribution board installation and inspection.

Important Notes

• Installation and device selection must be completed by a qualified electrician using the manufacturer’s wiring instructions.
• This is an AC surge protection device. Do not use it as a DC solar PV surge arrestor.
• Confirm the earthing arrangement, required backup protection, connection sizes and coordination with other surge protection devices before installation.
• The 10 kA rating is a surge current rating, not the continuous load current or a circuit breaker rating.
• Surge protection does not replace overload, short-circuit or earth leakage protection.

Technical Specifications