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SIPROTEC 4 7SJ62 Multifunction Protection (SIPROTEC 4 7 sj62多功能保护)
5 Overcurrent Protection / 7SJ62
SIPROTEC 4 7SJ62
Multifunction Protection Relay
Function overview
Protection functions
• Time-overcurrent protection
(definite-time/inverse-time/user-def.)
• Directional time-overcurrent protection
(definite-time/inverse-time/user-def.)
• Sensitive dir./non-dir. earth-fault
detection
• Displacement voltage
• Intermittent earth-fault protection
s
p
e. • High-impedance restricted earth fault
n
e
p
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