Iskra FPC 200 - Glossary

Glossary
USER MANUAL FPC 200 - 3/2017 175
9 Glossary
3xI
0
– Three times zero sequence current calculation.
3xU
0
– Three times zero sequence voltage calculation.
AC – Alternating current.
ADC – Analog to digital converter.
AO – Analog outputs.
AR – Auto-reclosing.
AUX – Auxiliary.
CB – Circuit breaker.
CBFP – Circuit breaker failure protection.
CLP – Cold load pickup.
COM – Communication.
CPU - Central processing unit.
CT – Current transformer.
DB-9 – Type of D-Sub connector.
DC – Direct current.
DI – Digital input.
DIO – Digital input output.
DO – Digital output.
EEPROM – Electrically erasable programmable read-only memory.
eMMC – Embedded multimedia card.
EXT – External trip.
FAT32 – File allocation table.
f
max
– Maximum detected system frequency.
f
min
– Minimum detected system frequency.
f – System frequency.
FPC 200 – Feeder protection and control 200 series protection relay.
I – AC Current input.
I
0
– Zero sequence current of symmetrical components calculation.
I
1
– Positive sequence current of symmetrical components calculation.
I
2
– Negative sequence current of symmetrical components calculation.
IDMT – Inverse definite minimum time.
I
e_n
– Nominal earth current, secondary rated earth current of ground CT.
I
e_pri
– Primary rated earth current of ground CT.
IEC – International Electrotechnical Commission.
IEEE – Institute of electrical and electronics engineers.
I
m
– Measured current.
I
m_min
– Minimal measured current.
I
n
– Nominal current, secondary rated phase current of CT.
I
n_obj
– Nominal primary current of the object.
I
p
– Pickup current.
I
pri
– Primary rated phase current of CT.
L
1
– First phase
L
2
– Second phase
L
3
– Third phase
LED – Light emitting diode.
LR – Locked rotor.
Modbus – Serial communications protocol.
MRAM – Magnetoresistive random-access memory.
MTO – Machine thermal overload.