Instantaneous, and time delayed overcurrent protection for phase and ground are
provided for each winding.
The following protection is also included:
• Undervoltage
• Overvoltage
• Overexcitation
• 4 step Over frequency
• 4 step under frequency
• Breaker failure protection for each breaker
• Provisions for Synch check
In addition, load tap changer control is also included.
The necessary auxiliary functions such as fuse failure supervision are also included.
The necessary trip logic is provided to trip the circuit breakers.
Measuring functions S, P, Q, I, V, PF, f are available for local presentation on the local
HMI and/or remote presentation. The availability of analog inputs allows connection to
separate metering cores and a built-in calibration on the analog inputs allows
calibration at site to very high accuracy, then involving the instrument transformer
errors and voltage drops in secondary cabling.
1MRK504116-UUS C Section 6
Configuration
859
Application manual
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