Siemens Industrial Controls 3UB81334FW2 Relay
The Siemens 3UB81334FW2 is a high-performance ESP200 solid state overload relay designed for demanding industrial motor protection. This 3-phase unit features a wide 13-52 amp full load amperage (FLA) adjustment range with a 4:1 ratio, significantly reducing inventory requirements for contractors managing multiple motor sizes. Engineered to replace traditional bimetallic heaters, this electronic overload relay offers selectable trip classes (5, 10, 20, or 30) via integrated DIP switches, providing precision protection for light, normal, and heavy starting conditions. The self-powered design eliminates the need for external power supplies, while the phase loss protection triggers in under three seconds to prevent catastrophic motor burnout. Built with a conformally coated circuit board, the 3UB81334FW2 maintains repeat accuracy of less than 1%, ensuring reliable performance in harsh environments with ambient temperatures ranging from -25°C to 65°C. For flexible field integration, it supports manual, automatic, and remote reset configurations, including a 24VDC electrical remote reset option compatible with modern automation systems.
Key Benefits for Technicians- Precision Motor Protection: Eliminates nuisance tripping with ambient-insensitive electronics and a thermal memory function that prevents hot-motor restarts.
- Enhanced Safety Logic: Integrated ground fault protection trips at 60% of motor current, shielding the system against insulation damage and moisture-induced faults.
- Simplified Installation: Features direct mounting or stand-alone DIN rail options with screw terminals and a removable terminal block to speed up wiring and maintenance.
- Visual Diagnostics: Includes a visible trip indicator and a dedicated test button to verify electronic functionality and trip mechanisms during routine inspections.
- Compact Frame B Design: Robust construction with 1NO-1NC auxiliary contacts rated B600/R300 for seamless integration with NEMA and IEC starters.
Can I use the Siemens 3UB81334FW2 for single-phase motor protection?
Yes, this ESP200 relay is suitable for both polyphase and single-phase motor applications when wired according to the manufacturer’s terminal configurations to ensure proper phase imbalance detection.
What is the reset delay for the automatic reset function?
When set to automatic mode, the relay requires a 3-minute cooling period after a trip before it attempts to reset. Manual resets can be performed immediately if the fault has been cleared.
Does this unit require separate heater elements?
No. As a solid state relay, the 3UB81334FW2 utilizes internal current transformers and electronic sensing, eliminating the cost and installation time associated with traditional thermal heaters.
Disclaimer: While we strive for 100% accuracy, product data and specifications are subject to change. Please contact our team to confirm compatibility or technical details before purchasing.
Siemens Industrial Controls 3UB81334FW2 Relay
The Siemens 3UB81334FW2 is a high-performance ESP200 solid state overload relay designed for demanding industrial motor protection. This 3-phase unit features a wide 13-52 amp full load amperage (FLA) adjustment range with a 4:1 ratio, significantly reducing inventory requirements for contractors managing multiple motor sizes. Engineered to replace traditional bimetallic heaters, this electronic overload relay offers selectable trip classes (5, 10, 20, or 30) via integrated DIP switches, providing precision protection for light, normal, and heavy starting conditions. The self-powered design eliminates the need for external power supplies, while the phase loss protection triggers in under three seconds to prevent catastrophic motor burnout. Built with a conformally coated circuit board, the 3UB81334FW2 maintains repeat accuracy of less than 1%, ensuring reliable performance in harsh environments with ambient temperatures ranging from -25°C to 65°C. For flexible field integration, it supports manual, automatic, and remote reset configurations, including a 24VDC electrical remote reset option compatible with modern automation systems.
Key Benefits for Technicians- Precision Motor Protection: Eliminates nuisance tripping with ambient-insensitive electronics and a thermal memory function that prevents hot-motor restarts.
- Enhanced Safety Logic: Integrated ground fault protection trips at 60% of motor current, shielding the system against insulation damage and moisture-induced faults.
- Simplified Installation: Features direct mounting or stand-alone DIN rail options with screw terminals and a removable terminal block to speed up wiring and maintenance.
- Visual Diagnostics: Includes a visible trip indicator and a dedicated test button to verify electronic functionality and trip mechanisms during routine inspections.
- Compact Frame B Design: Robust construction with 1NO-1NC auxiliary contacts rated B600/R300 for seamless integration with NEMA and IEC starters.
Can I use the Siemens 3UB81334FW2 for single-phase motor protection?
Yes, this ESP200 relay is suitable for both polyphase and single-phase motor applications when wired according to the manufacturer’s terminal configurations to ensure proper phase imbalance detection.
What is the reset delay for the automatic reset function?
When set to automatic mode, the relay requires a 3-minute cooling period after a trip before it attempts to reset. Manual resets can be performed immediately if the fault has been cleared.
Does this unit require separate heater elements?
No. As a solid state relay, the 3UB81334FW2 utilizes internal current transformers and electronic sensing, eliminating the cost and installation time associated with traditional thermal heaters.
Disclaimer: While we strive for 100% accuracy, product data and specifications are subject to change. Please contact our team to confirm compatibility or technical details before purchasing.
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Description
The Siemens 3UB81334FW2 is a high-performance ESP200 solid state overload relay designed for demanding industrial motor protection. This 3-phase unit features a wide 13-52 amp full load amperage (FLA) adjustment range with a 4:1 ratio, significantly reducing inventory requirements for contractors managing multiple motor sizes. Engineered to replace traditional bimetallic heaters, this electronic overload relay offers selectable trip classes (5, 10, 20, or 30) via integrated DIP switches, providing precision protection for light, normal, and heavy starting conditions. The self-powered design eliminates the need for external power supplies, while the phase loss protection triggers in under three seconds to prevent catastrophic motor burnout. Built with a conformally coated circuit board, the 3UB81334FW2 maintains repeat accuracy of less than 1%, ensuring reliable performance in harsh environments with ambient temperatures ranging from -25°C to 65°C. For flexible field integration, it supports manual, automatic, and remote reset configurations, including a 24VDC electrical remote reset option compatible with modern automation systems.
Key Benefits for Technicians- Precision Motor Protection: Eliminates nuisance tripping with ambient-insensitive electronics and a thermal memory function that prevents hot-motor restarts.
- Enhanced Safety Logic: Integrated ground fault protection trips at 60% of motor current, shielding the system against insulation damage and moisture-induced faults.
- Simplified Installation: Features direct mounting or stand-alone DIN rail options with screw terminals and a removable terminal block to speed up wiring and maintenance.
- Visual Diagnostics: Includes a visible trip indicator and a dedicated test button to verify electronic functionality and trip mechanisms during routine inspections.
- Compact Frame B Design: Robust construction with 1NO-1NC auxiliary contacts rated B600/R300 for seamless integration with NEMA and IEC starters.
Can I use the Siemens 3UB81334FW2 for single-phase motor protection?
Yes, this ESP200 relay is suitable for both polyphase and single-phase motor applications when wired according to the manufacturer’s terminal configurations to ensure proper phase imbalance detection.
What is the reset delay for the automatic reset function?
When set to automatic mode, the relay requires a 3-minute cooling period after a trip before it attempts to reset. Manual resets can be performed immediately if the fault has been cleared.
Does this unit require separate heater elements?
No. As a solid state relay, the 3UB81334FW2 utilizes internal current transformers and electronic sensing, eliminating the cost and installation time associated with traditional thermal heaters.
Disclaimer: While we strive for 100% accuracy, product data and specifications are subject to change. Please contact our team to confirm compatibility or technical details before purchasing.
