SIPROTEC 7SJ600
Multifunction overcurrent, motor and overload protection relay
Description
The SIPROTEC 7SJ600 is a numerical overcurrent relay which, in addition to its primary use in radial distribution networks and motor protection, can also be employed as backup for feeder, transformer and generator differential protection.
The SIPROTEC 7SJ600 provides definite-time and inverse-time overecurrent protection along with overload and negative-sequence protection for a very comprehensive relay package. In this way, equipment such as motors can be protected against asymmetric and excessive loading. Asymmetric short-circuits with currents that can be smaller than the largest possible load currents or phase interruptions are reliably detected.
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Function overview
Monitoring functions
Fault event logging with time stamp (buffered)
8 oscillographic fault records
Continuous self-monitoring
Communication
Via personal computer and DIGSI 3 or DIGSI 4 (≥ 4.3)
Via RS232 – RS485 converter
Via modem
IEC 60870-5-103 protocol, 2 kV-isolated
RS485 interface
Hardware
3 current transformers
3 binary inputs
3 output relays
1 live status contact