172 6LE008146B
Glossary
ANSI
American National Standards Institute. Each electrical
protection corresponds to an ANSI code.
CIP
Communications interface port with the panel display.
DHCP
Dynamic Host Configuration Protocol. Dynamic Host
Configuration Protocol used to manage IP addresses.
ENCT
External neutral current sensor.
ENVA
External neutral potential.
GF
Earth fault protection.
HWF
Internal protection against electronic failures in the trip unit
(hardware failure).
INST
Instantaneous Protection.
LTD
Long Time Delay Protection.
MCR
Making Current Release. Automatic instantaneous protection
upon closure of the power contacts for short-circuit fault.
MHT
Magnetic Hold trigger. Coil connected directly to the
electronic trip unit, which activates the mechanical opening
lock of the circuit breaker in case of electrical fault or action
by an SH shunt trip coil or UV undervoltage release coil.
OAC
Output alarm contact.
PF
Power factor. Power factor.
Breaking capacity
The value of the prospective current that a switching device
is capable of breaking at a stated voltage under prescribed
conditions of use and behaviour.
Reference is generally made to the rated ultimate short-
circuit (Icu) breaking capacity and to the service short-circuit
breaking capacity (Ics).
Rated ultimate short-circuit
breaking capacity (Icu)
Expressed in kA, it indicates the maximum breaking capacity
of the circuit breaker. It is confirmed by a test sequence
O-t-CO (according to IEC 60947-2) at Icu, followed by a
test to prove that the circuit is correctly isolated. This test
ensures safety for the user.
PTA
Overload pre-alarm.
SNTP
Simple Network Time Protocol. Used by a server managing
the date and time of the communication network.
STD
Short Time Delay Protection.
Thi
Thermal image. Default setting of the Long time delay
protection in accordance with IEC 60947-2.
ZSI
Zone selectivity.
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