ABB RET670 Commissioning Manual

ZAngPG
50%
Ohm/loop
R
X
ANSI07000010-1-en.vsd
ANSI07000010 V1 EN
Figure 28: Proposed test points for phase-to-ground faults
Table 23: Test points for phase-to-ground loops A-B (Ohm/Loop)
Test
points
Reach Value Comments
1 X ZPG · sin(ZAngPG)
R ZPG · cos(ZAngPG)
2 X 0,5·ZPG · sin(ZAngPG)
R 0,5·ZPG + ΔR = 0,5·ZPG · (1 - cos(ZAngPG))
3 X 0,5·ZPG·sin(ZangPG)
R 0,5·ZPG - ΔR = 0,5·ZPG · (1 - cos(ZAngPG))
Check also in the same way as for phase-to-ground fault for each test point that the output
signals PHG_FLT, are activated where x refers to the actual phase to be tested. After the
timer tPG for the zone has elapsed, also the signals TRIP, TRPG and TR_x shall be
activated.
11.4.4 Faulty phase identification with load encroachment FMPSPDIS
(21)
There is no specific test routine for this function. The function is tested in conjunction with
other impedance (mho) functions.
1MRK 504 165-UUS - Section 11
Testing functionality by secondary injection
Transformer protection RET670 2.2 ANSI 123
Commissioning manual

ABB RET670 Specifications

General

Rated Frequency	50/60 Hz
Inputs	Analog and binary inputs
Application	Protection of power systems
Communication Protocols	IEC 61850, DNP3, Modbus
Operating Temperature Range	-25°C to +55°C
Mounting	Rack mounted
Number of Binary Inputs	Up to 48
Number of Binary Outputs	32
Protection Functions	Overcurrent Protection
Outputs	Binary outputs
Enclosure	IP 54
Type	Line Differential Protection
Number of Analog Inputs	24