PREFACE
7
NA30 - Manual - 04 - 2022
52a
Auxiliary contact in the breaker that is in the same position as the
breaker. It can be assigned to a binary input to locate the CB posi-
tion (Breaker failure and/or CB diagnostic functions). (52a open = CB
open)
52b
Auxiliary contact in the breaker that is in the opposite position as the
breaker (52b open = CB closed)
K1...K6...K10
Output relays
Pulse
Output relay with pulse operation
tTR
Output relay minimum pulse width
Latched
Output relay with latched operation (manual reset) Output relay with
latched operation (automatic reset)
No-latched
Output relay with no-latched operation (automatic reset)
CT
Current Transformer
P1
IEC nomenclature for primary polarity mark of CTs (as an alternative to
a ANSI dot)
P2
IEC nomenclature for primary polarity mark of CTs (as an alternative to
a ANSI no-dot)
S1
IEC nomenclature for secondary polarity mark of CTs (as an alternative
to a ANSI dot)
S2
IEC nomenclature for secondary polarity mark of CTs (as an alternative
to a ANSI no-dot)
Self test
Diagnostic
Start
Leave an initial condition or reset condition (Pickup)
Trip
Operation (with operate time)
Operating time
Duration of time interval between the instant when the character-
istic quantity in reset condition is changed, under specified condi-
tions, and the instant when the relay operates
Dropout ratio
The ratio of a reset value to an operate value in well-specified con-
ditions. The dropout ratio may be lower or greater than 1 according
as an over or under element is considered
Reset time
Duration of the time interval between the instant when the charac-
teristic quantity in operate condition is changed, under specified
conditions, and the instant when the relay operates.
The stated reset time is related to a step variation of characteristic
quantity in operate condition to the reset condition.
Overshoot time
The critical impulse time for a relay which is in its reset condition,
is the longest duration a specified change in the input energizing
quantity(ies) (characteristic quantity), which will cause the relay
to change to operate condition, can be applied without the relay
switches. The overshoot time is the difference from the operate time
and the critical impulse time.
The declared values for the overshoot time are applicable with the
lower setting value of the operation time.
MMI (Man Machine Interface) Operator front panel
ThyVisor
Setting and monitoring software
Log file
A text file that lists actions that have occurred (ThyVisor).
J2SE
Java Platform Standard Edition
Subnet Mask
(Ethernet nomenclature)
Sw
Software
Fw
Firmware
Upgrade
Firmware upgrade
XML
eXtensible Markup Language
