1.3 Characteristics
23
7UT613/63x Manual
C53000-G1176-C160-2
1.3 Characteristics
General Features • Powerful 32-bit microprocessor system.
• Complete digital measured value processing and control, from the sampling and
digitalization of the analogue input quantities to the initiation of outputs for tripping
or closing circuit breakers.
• Complete galvanic and reliable separation between the internal processing circuits
of the device and the external measurement, control, and power supply circuits
because of the design of the analog input transducers, binary input and output mod-
ules, and the DC/DC or AC/DC converters.
• Suitable for power transformers, generator, motors, reactors, or smaller busbar ar-
rangements, as well as for multi-terminal lines and multi-winding transformers
• Easy device operation through an integrated operator panel or by means of a con-
nected personal computer running DIGSI.
Transformer Differ-
ential Protection
• Current restraint tripping characteristic
• Restraint feature against high inrush currents with 2nd harmonic
• Restraint feature against transient and steady-state fault currents caused e.g. by
overexcitation of transformers, using a further harmonic (3rd or 5th harmonic)
• Insensitivity to DC components and current transformer saturation
• High level of stability even with different degrees of current transformer saturation
• High-speed instantaneous trip in case of high-current transformer faults
• Adjustable to the conditioning of the starpoint(s) of the power transformer
• Increased earth-fault sensitivity during detection of the ground current of an earthed
transformer winding
• Integrated matching of the transformer connection group
• Integrated matching of the transformation ratio including different rated currents of
the transformer windings
Differential Protec-
tion for Generators
and Motors
• Current restraint tripping characteristic.
• High sensitivity
• Short tripping time
• Insensitivity to DC components and current transformer saturation
• High level of stability even with different degrees of current transformer saturation
• Independent of the conditioning of the starpoint
Differential Protec-
tion for Mini-
Busbars and Short
Lines
• Tripping characteristic with current restraint
• Short tripping time
• Insensitivity to DC components and current transformer saturation
• High level of stability even with different degrees of current transformer saturation
• Monitoring of the current connections with operation currents
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