Setting Parameters - ABB RET670 Applications Manual

Section 3
IED application
3.7.3.3
Table 92: EFPIOC (50N) Group settings (basic)
Name Values (Range)
Operation Disabled
Enabled
IBase 1 - 99999
Pickup 1 - 2500
Table 93: EFPIOC (50N) Group settings (advanced)
Name Values (Range)
MultPU 0.5 - 5.0
3.7.4
3.7.4.1
422

Setting parameters

Unit Step
- -
A 1
%IB 1
Unit Step
- 0.1
Four step residual overcurrent protection, zero, negative
sequence direction EF4PTOC (51N/67N)
Function description
Four step residual overcurrent
protection
Application
The four step residual overcurrent protection EF4PTOC (51N_67N) is used in several
applications in the power system. Some applications are:
In many applications several steps with different current pickup levels and time delays
are needed. EF4PTOC (51N_67N) can have up to four, individual settable steps. The
flexibility of each step of EF4PTOC (51N_67N) is great. The following options are
possible:
Non-directional/Directional function: In some applications the non-directional
functionality is used. This is mostly the case when no fault current can be fed from the
protected object itself. In order to achieve both selectivity and fast fault clearance, the
directional function can be necessary. This can be the case for ground-fault protection
in meshed and effectively grounded transmission systems. The directional residual
overcurrent protection is also well suited to operate in teleprotection communication
schemes, which enables fast clearance of ground faults on transmission lines. The
Default Description
Disabled Disable/Enable Operation
3000 Base current
200 Operate residual current level in % of IBase
Default Description
1.0 Multiplier for operate current level
IEC 61850 IEC 60617
identification identification
EF4PTOC
4
4
TEF-REVA V1 EN
1MRK504116-UUS C
ANSI/IEEE C37.2
device number
51N/67N
IN
alt
Application manual