2. Functions
2.1 Standard functions
This chapter includes functional descriptions of standard functions as well as illustrations of the relevant application types.
Flowcharts and single-line diagrams will be used in order to simplify the information.
The standard functions are listed in the following paragraphs.
2.1.1 Operation modes
• Automatic Mains Failure
• Island operation
• Fixed power/base load
• Peak shaving
• Load takeover
• Mains power export
2.1.2 Engine control
• Start/stop sequences
• Run and stop coil
• Relay outputs for governor control
2.1.3 Generator protection (ANSI)
• 2 × reverse power (32)
• 5 × overload (32)
• 6 × over-current (50/51)
• 2 × over-voltage (59)
• 3 × under-voltage (27)
• 3 × over-/under-frequency (81)
• Voltage-dependent over-current (51V)
• Current/voltage unbalance (60)
• Loss of excitation/over-excitation (40/32RV)
• Non-essential load/load shedding, three levels (I, Hz, P>, P>>)
• Multi-inputs (digital, 4 to 20 mA, 0 to 40 V DC, Pt100, Pt1000 or RMI)
• Digital inputs
2.1.4 Busbar protection (ANSI)
• 4 × over-voltage (59)
• 5 × under-voltage (27)
• 4 × over-frequency (81)
• 5 × under-frequency (81)
• Voltage unbalance (60)
2.1.5 Display DU-2
• Prepared for remote mounting
• Push-buttons for start and stop
DESIGNER'S HANDBOOK 4189341275A EN Page 11 of 196
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