Three-Phase Thermal Overload Protection For Overhead Lines And Cables T1Pttr - ABB REF615 Applications Manual
Feeder protection and control
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Also See for REF615:
- Applications manual (404 pages) ,
- Operation manual (126 pages) ,
- Product manual (57 pages)
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1MRS756378 D
5.1.3
5.1.3.1
5.1.3.2
REF615
Application Manual
GUID-276A9D62-BD74-4335-8F20-EC1731B58889 V1 EN
Figure 68:
Closed ring network topology where feeding lines are protected with
directional overcurrent relays
Three-phase thermal overload protection for overhead lines
and cables T1PTTR
Identification
Table 60:
Function identification
IEC 61850 identification:
IEC 60617 identification:
ANSI/IEEE C37.2 device number:
Functionality
The increased utilization of power systems closer to the thermal limits has generated
a need for a thermal overload function also for power lines.
A thermal overload is in some cases not detected by other protection functions, and
the introduction of the thermal overload function T1PTTR allows the protected circuit
to operate closer to the thermal limits.
Protection functions
T1PTTR
3lth>
49F
Section 5
143
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