IEC 61869-15 pdf free download

IEC 61869-15 pdf free download.Instrument transformers – Part 15: Additional requirements for voltage transformers for DC applications.
3.5.1502 step response time Tsr for a step response, the duration of the time interval between the instant of the step change of an input variable and the instant when the output variable reaches for the first time a specified percentage of the difference between the final and the initial steady-state values
Note 1 to entry: The step response time includes the delay time of the voltage transformer.
[SOURCE: lEG 60050-351 :201 3, 351 -45-36 modified — Note ito entry of the source has been deleted and a new Note 1 to entry has been added, and the symbol has been added.]
3.5.1503 settling time T5
for a step response, the duration of the time interval between the instant of the step change of an input variable and the instant when the difference between the step response and their steady-state value remains smaller than the transient value tolerance
Note 1 to entry: The settling time includes the delay time of the voltage transformer.
[SOURCE: lEG 60050-351 :201 3, 351 -45-37 modified — Note ito entry of the source has been deleted and a new Note 1 to entry has been added, and the symbol has been added.]
3.5.1504 overshoot Vrn
for a step response of a transfer element, the maximum transient deviation from the final steady-state value of the output variable, usually expressed in percent of the difference between the final and the initial steady-state values and for reference-variable step response or disturbance-variable step response of a control system the maximum transient deviation from the desired value
[SOURCE: lEG 60050-351:2013, 351-45-38, modified — Note ito entry has been deleted and the symbol has been replaced.]
6.8 Multiple chopped Impulse on primary terminals
Subclause 6.8 of IEC 61869-1:2007 is replaced by the following one:
If additionally specified, the primary terminals of oil-immersed voltage transformers having Urn equal to or abovel00 kV shall withstand multiple chopped impulses in accordance with 7.4.2 of lEG 61869-1:2007.
NOTE Requirements and tests relate to the behaviour of the internal shields and connections carrying high- frequency transient currents. The test can also be applied to ratings below this level.
6.9 Internal arc fault protection requirements
Subclause 6.9 of IEC 61869-1:2007 is replaced by the following one:
These requirements apply to oil-immersed and gas-insulated voltage transformers having Urn equal to or above 100 kV, for which an internal arc fault protection class is additionally specified.
If additionally specified, the instrument transformer shall be able to withstand an internal arc of the specified current and duration.
All information shall be marked in an indelible manner on a rating plate securely attached to the transformer (at least the common rating plate) or to the secondary auxiliary cabinet for the secondary converter and auxiliary power supply, if present.
6.602 Requirements for electrical transmitting system and electrical wires for output
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6.602.1 Connectors
Subclause 6.602.1 of lEG 61869-6:2016 is replaced by the following one:
Screw terminals are the standard interface.
For applications requesting a high bandwidth, it is preferable to use a coaxial connector. In
this case, the centre pin shall correspond to the “a” terminal.
6.1501 Digital interface
Refer to the different clauses and annexes of lEG 61869-9:2016.
NOTE Digital interfaces for DC applications are still under development, and the full adequacy of IEC 61869-9 has still to be improved.
6.1502 DesIgn requirements for DC voltage dividers
The capacitors shall comply with Subclause 6.1 of IEC 60815-1, regarding their individual insulation level.
IEC 61869-15 pdf download.