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Three-phase thermal relay protection device

ODN and passive infrastructure knowledge brief Published 06 Apr 2024

Prepared for preliminary research by the GESTIONVAL ODN knowledge desk. Confirm network topology, split ratio, box or cabinet capacity, joint closure rating and loss budget against current standards and product documentation.

Thermal overload relay provides overcurrent and phase failure protection for AC motors. Current setting range 30-40Amp or 37-50Amp for selection, current rating 93A, working voltage 3-phase 220V~690V, insulation voltage 690V, matching 40A contactor and 63A/100A gG fuse breaker. 1) The SIRIUS 3RN thermistor motor protection devices can be used to provide additional temperature-dependent protection. 2) Available as an alternative to screw terminals. It provides a thermal adjustement dial, buttons for test, stop. Motor protection can be divided into the following 3 levels: (a) External protection against short circuit (b) External protection against overload (c) Built-in motor protection.

Three-phase thermal relay protection device

KOA7 Device Switch Machine 380/400V 3 Phase with Cable, Phase

KOA7 Device Switch Machine 380/400V 3 Phase with Cable, Phase Inverter, and Combined Emergency Stop Flap Safety: Thermal connection, restart protection, low voltage release, with emergency stop

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This reference is intended for preliminary ODN and passive infrastructure research. Topology, split ratio, box or cabinet capacity, closure rating, cable type, test limits and applicable standards must be verified for the specific project.

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