Application - ABB RELION 611 Series Technical Manual

Section 4
Protection functions
4.1.1.7
94
Operating curve type
(13) IEC Short Time Inverse
(14) IEC Long Time Inverse
(15) IEC Definite Time
(17) User programmable
(18) RI type
(19) RD type
PHIPTOC supports only definite time characteristic.
For a detailed description of timers, see the
features
Table 68: Reset time characteristics supported by different stages
Reset curve type PHLPTOC
(1) Immediate
(2) Def time reset
(3) Inverse reset
The Type of reset curve setting does not apply to PHIPTOC or when
the DT operation is selected. The reset is purely defined by the Reset
delay time setting.

Application

PHxPTOC is used in several applications in the power system. The applications
include but are not limited to:
• Selective overcurrent and short-circuit protection of feeders in distribution and
subtransmission systems
• Backup overcurrent and short-circuit protection of power transformers and
generators
• Overcurrent and short-circuit protection of various devices connected to the
power system, for example shunt capacitor banks, shunt reactors and motors
• General backup protection
PHxPTOC is used for single-phase, two-phase and three-phase non-directional
overcurrent and short-circuit protection. Typically, overcurrent protection is used for
section in this manual.
PHHPTOC
x x
x x
x x
1MRS757454 D
PHLPTOC PHHPTOC
x
x
x
x
x
x
General function block
Note
Available for all operate time curves
Available for all operate time curves
Available only for ANSI and user
programmable curves
Technical Manual
x
x
611 series