GL.4
SEL-2414 Transformer Monitor Instruction Manual Date Code 20130214
Glossary
Sequential Events Recorder (SER)—Z number
Sequential
Events Recorder
(SER)
A device function that stores a record of the date and time of each assertion and
deassertion of every Device Word bit in a settable list. Provides a useful way to
determine the order and timing of events following a device operation.
TC
Abbreviation for Thermocouple. A TC is made of two different metals that pro-
duce a voltage related to a temperature difference. The SEL-2414 can measure
the voltage of the TC, and thus determine the temperature at the TC location.
Typically widely used in industrial areas but have been used on older utility trans-
formers instead of RTDs.
Transducer
Device that converts the input to the device to an analog output quantity of either
current (±1, 2.5, 5, 10 and 20 mA, or 4–20 ma), or voltage (±1, 2.5, 5, or 10 V).
Unbuffered Report
IEC 61850 IEDs can issue immediate unbuffered reports of internal events
(caused by trigger options data-change, quality-change, and data-update) on a
“best efforts” basis. If no association exists, or if the transport data flow is not fast
enough to support it, events may be lost.
VT
Abbreviation for voltage transformer. Also referred to as a potential transformer
or PT.
Wye
As used in this instruction manual, a phase-to-neutral connection of voltage
transformers for electrical measuring purposes. Three voltage transformers are
used with one primary lead of the first transformer connected to A-phase and the
other lead connected to ground. The second and third voltage transformers are
connected to measure the voltage from B-phase and C-phase-to-ground, respec-
tively. This connection is frequently called “four-wire wye,” alluding to the three
phase leads plus the neutral lead.
Z number
That portion of the device FID string that identifies the proper ACSELERATOR
QuickSet
®
software device driver version when creating or editing device set-
tings files.
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