Relay; Overload; Solid State; Trip Class 20E; 3 Poles; Contactors Mounting; 60A Full Load; 3A/230VAC, 0.11A/220VDC; 1NO 1NC Auxiliary Contact; IEC Size S2; Manual/Automatic Reset; Compensated Temperature; IP20, IP00 Enclosure

SKU: 88762191466
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Type: Solid State, Trip Class 20E
Mounting: Contactors
Size, IEC: S2
Reset: Manual/Automatic
Ambient Temperature: Compensated
Poles: 3
Motor FLA: 60A
Auxiliary Contacts: 1NO 1NC
Rating, Contacts: 3A/230VAC, 0.11A/220VDC
Enclosure: IP20, IP00
Manufacturer Series: SIRIUS 3RB3
The 3RB30 solid-state overload relays up to 40A with internal power supply have been designed for inverse-time delayed protection of loads with normal and heavy starting against excessive temperature rises due to overload, phase unbalance or phase failure. An overload, phase unbalance or phase failure result in an increase of the motor current beyond the set rated motor current. This current rise is detected by the current transformers integrated into the devices and evaluated by corresponding solid-state circuits which then output a pulse to the auxiliary contacts. The auxiliary contacts then switch off the load by means of a contactor. The break time depends on the ratio between the tripping current and current setting Ie and is stored in the form of a long-term stable tripping characteristic.