ABB RET670 - Setting Parameters; Four Step Phase Overcurrent Protection OC4 PTOC (51;67)

3.7.1.3 Setting parameters
Table 85: PHPIOC (50) Group settings (basic)
Name Values (Range) Unit Step Default Description
Operation Disabled
Enabled
- - Disabled Disable/Enable Operation
IBase 1 - 99999 A 1 3000 Base current
OpModeSel 2 out of 3
1 out of 3
- - 1 out of 3 Select operation mode (2 of 3 / 1 of 3)
Pickup 1 - 2500 %IB 1 200 Phase current pickup in % of IBase
Table 86: PHPIOC (50) Group settings (advanced)
Name Values (Range) Unit Step Default Description
MultPU 0.5 - 5.0 - 0.1 1.0 Multiplier for operate current level
3.7.2 Four step phase overcurrent protection OC4PTOC (51/67)
Function description IEC 61850
identification
IEC 60617
identification
ANSI/IEEE C37.2
device number
Four step phase overcurrent protection OC4PTOC
4
4
alt
3I>
TOC-REVA V1 EN
51/67
3.7.2.1 Application
The Four step phase overcurrent protection 3-phase output OC4PTOC (51_67) is used
in several applications in the power system. Some applications are:
• Short circuit protection of feeders in distribution and subtransmission systems.
Normally these feeders have radial structure.
• Back-up short circuit protection of transmission lines.
• Back-up short circuit protection of power transformers.
• Short circuit protection of different kinds of equipment connected to the power
system such as; shunt capacitor banks, shunt reactors, motors and others.
• Back-up short circuit protection of power generators.
1MRK504116-UUS C Section 3
IED application
401
Application manual