ABB REF615 L User Manual

Section 4 Protection functions
4.1 Three-phase current protection
4.1.1 Three-phase non-directional overcurrent protection
PHxPTOC
4.1.1.1 Identification
Function description IEC 61850
identification
IEC 60617
identification
ANSI/IEEE C37.2
device number
Three-phase non-directional
overcurrent protection - Low stage
PHLPTOC 3I> 51P-1
Three-phase non-directional
overcurrent protection - High stage
PHHPTOC 3I>> 51P-2
Three-phase non-directional
overcurrent protection - Instantaneous
stage
PHIPTOC 3I>>> 50P/51P
4.1.1.2 Function block
A070553 V1 EN
Figure 69: Function block
4.1.1.3 Functionality
The three-phase overcurrent protection PHxPTOC is used as one-phase, two-phase
or three-phase non-directional overcurrent and short-circuit protection.
The function starts when the current exceeds the set limit. The operate time
characteristics for low stage PHLPTOC and high stage PHHPTOC can be selected
to be either definite time (DT) or inverse definite minimum time (IDMT).The
instantaneous stage PHIPTOC always operates with the DT characteristic.
1YHT530004D05 D Section 4
Protection functions
615 series 139
Technical Manual

ABB REF615 L Specifications

General

Type	Feeder Protection Relay
Rated Frequency	50/60 Hz
Weight	Approx. 1.5 kg
Communication Protocols	IEC 61850, Modbus RTU, DNP3
Protection Functions	Overcurrent, Earth fault, Thermal overload, Under/Over voltage, Under/Over frequency
Enclosure	IP20