Introduction
1.3 Characteristics
SIPROTEC, 7UM62, Manual
C53000-G1176-C149-7, Release date 03.2010
32
Restart Inhibit for Motors 66
• Approximate computation of rotor overtemperature.
• Startup is permitted only if the rotor has sufficient thermal reserves for a complete startup
• Calculation of waiting time until restarting is enabled.
• Different prolongation of cooldown time constants for standstill/operation period is taken into consideration.
• Disabling the restart inhibit is possible if an emergency startup is required.
Circuit Breaker Failure Protection 50BF
• By checking the current or evaluation of the breaker auxiliary contacts.
• Initiation of each integrated protection function allocated to the circuit breaker.
• Initiation possible through a binary input from an external protective device.
Inadvertent Energizing Protection
• Damage limitation for inadvertent switching-on of a stationary generator by fast opening of the generator
switch.
• Instantaneous value acquisition of the phase currents.
• Operational state and voltage supervision as well as fuse failure monitor are the enable criteria.
DC Voltage / DC Current Protection
• DC voltage acquisition via integrated isolating amplifier.
• Suited for measurement of small DC currents.
• Can be switched for increase or decrease.
• Suitable also for AC voltage measurement (rms values).
Analog Outputs
• Output of up to four analog operational measured values (depending on the variant ordered).
Threshold Supervision
• 10 freely assignable indications for threshold supervision.
• Implementation of fast supervision tasks with CFC.
Temperature Measurement via Thermoboxes
• Acquisition of any ambient temperatures or coolant temperatures using RTD boxes and external tempera-
ture sensors.
IPhase Rotation
• Selectable phase sequence L1, L2, L3 or L1, L3, L2 via setting (static) or binary input (dynamic).
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