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SIPROTEC 7SJ45 - Overcurrent Protection, CT powered, setting with DIP-switchesOverview Functions - Operation without auxiliary voltage via integrated CT power supply
- Standard current transformers (1 A/5 A)Low power consumption: 1.4 VA at IN (of the relay)
- Easy mounting due to compact housing
- Easy connection via screw-type terminals
Protection functions - 2-stage overcurrent protection
- Definite-time and inverse-time characteristics (IEC/ANSI)
- High-current stage I>> or calculated earth-current stage IE> or IEp> selectable
- Trip with pulse output (24 V DC / 0.1Ws) or relay output (changeover contact)
- Repetition of trip during circuit-breaker failure (relays with pulse output)
- Combination with electromechanical relays is possible due to the emulation algorithm
Monitoring functions - Hardware and software are continuously monitored during operation
Front design - Simple setting via DIP switches (self-explaining)
- Settings can be executed without auxiliary voltage – no PC
- Integrated mechanical trip indication optionally
Additional features - Optional version available for most adverse environmental conditions (condensation permissible)
- Flush mounting or surface (rail) mounting
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