Industrial Devices – Motor Protective Circuit Breakers

Ex9SN25B Motor Protective Circuit Breakers

• Manual motor starters for motor protection
• Complies with EN 60947-2 and EN 60947-4-1 standards
• Rated current Ie up to 25 A at 415 V AC-3
• Rated operating voltage Ue up to  400/415 V
• Short-circuit protection
• Isolation function
• Overload protection
• Phase failure protection
• Suitable for three-phase and single-phase applications
• Wide range of accessories

Manual motor starters are electromechanical protection devices for the main circuit. They are primarily used to switch motors ON/OFF manually and provide fuseless protection against short circuits and phase failure. Fuseless protection with a manual motor starter saves costs and space while ensuring a rapid reaction under short-circuit conditions, shutting down the motor within milliseconds. Manual motor starter combinations are configured together with contactors and overload relays.

Ex9S32A Motor Protective Circuit Breakers

• Manual motor starters for motor protection
• Complies with IEC/EN 60947-2 and IEC/EN 60947-4-1 standards
• Rated current $I_e$ up to 32 A at 415 V AC-3
• Rated operating voltage $U_e$ up to 690 V
• Overload, short-circuit, and phase failure protection
• Ambient temperature compensation
• Single size suitable for distribution boards with 45 mm cutout
• Wide range of accessories

Ex9S32A manual motor starters provide overload, short-circuit, and phase failure protection for three-phase asynchronous motors with infrequent starting. They are also suitable for power distribution line protection or can be used simply as switch-disconnectors. The precise setting of the adjustable overload current allows for optimized motor protection via the circuit breaker. In 3P applications, the correct $I_r$ setting also provides protection against overload caused by a lost phase.

The ambient temperature compensation function reduces the impact of surrounding temperatures. The trip test mechanism allows for system function testing, while the rotary control knob locking mechanism prevents unauthorized operation. These motor protective circuit breakers can be combined with a vast range of accessories, including auxiliary and signaling contacts, shunt releases, and undervoltage releases. Various accessory combinations can be configured.

Ex9S80A Motor Protective Circuit Breakers

• Manual motor starters for motor protection
• Complies with IEC/EN 60947-2 and IEC/EN 60947-4-1 standards
• Rated current Ie up to 80 A at 415 V AC-3
• Rated operating voltage Ue up to 690 V
• Overload, short-circuit, and phase failure protection
• Ambient temperature compensation
• Wide range of accessories

Ex9S80A manual motor starters provide overload, short-circuit, and phase failure protection for three-phase asynchronous motors with infrequent starting. They are also suitable for power distribution line protection or can be used simply as switch-disconnectors. The precise setting of the adjustable overload current allows for optimized motor protection via the circuit breaker. In 3P applications, the correct Ir setting also provides protection against overload caused by a lost phase.

The ambient temperature compensation function reduces the impact of surrounding temperatures. The trip test mechanism allows for system function testing, while the rotary control knob locking mechanism prevents unauthorized operation. These motor protective circuit breakers can be combined with a vast range of accessories, including auxiliary and signaling contacts, shunt releases, and undervoltage releases. Various accessory combinations can be configured.

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