Thytronic NA11 User Manual

7
NA11 - Manual - 02 - 2009INTRODUCTION
Log fi le A text fi le that lists actions that have occurred (ThySetter).
Latched Output relay with latched operation (manual reset) Output relay with
latched operation (automatic reset)
MMI (Man Machine Interface) Operator front panel
No-latched Output relay with no-latched operation (automatic reset)
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)
Dropout ratio The ratio of a reset value to an operate value in well-specifi ed 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 time interval between the instant when the characteris-
tic quantity in operate condition is changed, under specifi ed condi-
tions, and the instant when the relay operates
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 Relay diagnostic
Start Leave an initial condition or reset condition
Subnet Mask (Ethernet nomenclature)
Sw Software
CT Current Transformer
TCS Trip Circuit Supervision
Operating time Duration of time interval between the instant when the character-
istic quantity in reset condition is changed, under specifi ed condi-
tions, and the instant when the relay operates
Reset time Duration of the time interval between the instant when the charac-
teristic quantity in operate condition is changed, under specifi ed
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 specifi ed 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.
ThySetter Setting and monitoring software
Trip Operation (with operate time)
tTR Output relay minimum pulse width
Upgrade Firmware upgrade
XML eXtensible Markup Language

Thytronic NA11 Specifications

General

Brand	Thytronic
Model	NA11
Category	Relays
Language	English