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MJS7-60B

The ABB MJS7-60B is a three-pole rotary load break switch/isolator from the MJ/MJS series of manual control and switching devices. It functions as a robust main switch or functional isolator for three-phase circuits in distribution boards, control panels, and industrial enclosures.

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Parameter Specification Device Type 3-Pole Rotary Load Break Switch / Disconnector Product Series MJ / MJS Series Rated Operational Current (Ie) 60 A (per pole, at specified utilization category) Number of Poles 3 Poles (3P) Rated Insulation Voltage (Ui) 690 V Rated Operational Voltage (Ue) 400 V AC / 500 V AC (3-phase) Utilization Category AC-22A (Switching of mixed resistive and inductive loads). AC-23A (Switching of motor loads or other highly inductive loads). Rated Making & Breaking Capacity Typically ≥ 10 x Ie (e.g., 600 A per phase) for AC-23A at 400V. Short-Time Withstand Current (Icw) Typically 10 kA for 1 second (A critical safety parameter ensuring it can withstand fault currents without damage to the isolation path). Mechanical Durability ≥ 10,000 operations Electrical Durability ≥ 5,000 operations (at rated current) Control Method Manual rotary operation via a detachable handle. Handle can be padlocked in the OFF position (commonly with up to 3 padlocks). Mounting Mounts directly onto a panel or enclosure door via a mounting kit. The switch body is installed behind the panel. Terminal Type Screw clamp terminals. The "B" variant often includes snap-on protective terminal covers. Terminal Connection Capacity Typically up to 35 mm² (for the 60A model). Protection Degree Switch body: IP00 (must be installed inside an enclosure). With handle mounted on door: Typically achieves IP54 or higher for the front. Ambient Temperature (Operation) -25°C to +60°C Standards Compliance IEC/EN 60947-1, IEC/EN 60947-3