Main isolator IS-125/2 276287

Professional isolation switch for demanding installations

The IS-125/2 main isolation switch is a reliable device designed for the safe disconnection of electrical circuits in industrial and commercial installations. The model with a rated current of 125 A and a voltage of 415 V AC ensures effective separation of two electrical circuits while maintaining full isolation functionality.

Construction and operating parameters

The device is designed as a two-pole switch with a width of 2 modules (35 mm), allowing for compact installation in modular distribution boards. The mounting depth is 69.5 mm, and the IP40 protection rating provides basic protection against contact with hazardous parts.

Key electrical parameters include a rated current of 125 A, a rated voltage of 415 V AC (minimum 240 V AC), and a rated breaking capacity of 10 kA. The short-circuit strength is 2 kA, and the insulation voltage reaches up to 690 V~. The design ensures a mechanical durability of at least 14 000 cycles and an electrical durability of at least 2000 cycles, guaranteeing long-term operation even under intensive use.

Functionality and safety

The switch offers stepped switching and high contact wear resistance, resulting in reliable operation throughout its service life. The device features a physical contact position indicator, allowing for monitoring of the connection status.

Operational safety is ensured by:

• Padlock lockout capability in the "0" position
• Terminal protection against contact according to BGV A3
• Compliance with IEC/EN 60947-3 standards
• Connection wire cross-sections from 2.5 to 50 mm²

Application and compatibility

An operating temperature from -5°C to +40°C enables installation in various environmental conditions. The device is mounted on a standard TS35 mm IEC/EN 60715 rail, and the terminal screw tightening torque is 2.5-5 Nm. Busbar/window-type terminals ensure secure connection of large cross-section wires through a robust switching mechanism design that guarantees effective galvanic separation of the circuits.