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Picture

SIPROTEC 7SJ600 - Overcurrent, Motor and Overload 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 definitetime and inverse-time overcurrent protection along with overload and negativesequence 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.

Function overview
Feeder protection
• Overcurrent-time protection
• Earth-fault protection
• Overload protection
• Negative-sequence protection
• Cold load pickup
• Auto-reclosure
• Trip circuit supervision

Motor protection
• Starting time supervision
• Locked rotor

Control functions
• Commands for control of a circuitbreaker
• Control via keyboard,
DIGSI 4 or SCADA system

Measuring functions
• Operational measured values I

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
CATALOG
MANUAL
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