ABB RET670 Commissioning Manual

Table 24: Test points for phase-to-phase loops L1-L2 (Ohm/Loop)
Test point Reach Set value Comments
1 X X1
set
R 0
2 X X1
set
R R1
set
3 X 0.8 x X1
set
R 0.8 x R1
set
+ RFPP/2
4 X 0.5 x X1
set
R 0.5 x R1
set
+ RFPP/2
5 X 0.85 x RFPP x tan (LdAngle) LdAngle = angle for the maximal load
transfer
R 0.85 x RFPP
6 X RLdFwd x tan (LdAngle)
R RLdFwd
7 X RLdFw x tan (LdAngle)
R 0
8 X –0.2143 x RFPP/2 Exact: 0.8 x RFPP/2 (ArgDir)
R 0.8 x RFPP/2
9 X –0.4 x RLdFwd x tan(ArgDir)
R 0.4 x RLdFwd
10 X 0.5 x X1
set
Exact –0.5 x R1
set
x tan(ArgNegRes-90)
R –0.23 x X1
set
11 X 0.8 x X1
set
Exact –0.5 x R1
set
x tan(ArgNegRes-90)
R –0.37 x X1
set
12 X 0.5 x X1
set
R 0.5 x R1
set
13 X 0 Only used when OperationLdCmp setting
is 0 (Disabled)
R 0.5 x RFPP
Table 25: Test points for phase-to-earth L3-G (Ohm/Loop)
Test point
Reach Value Comments
1 X (2 x X1
set
+X0
set
)/3
R 0
2 X (2 x X1
set
+ X0
set
)/3
R 2 x R1
set
+ R0
set
)/3
Table continues on next page
Section 11 1MRK 504 165-UUS -
Testing functionality by secondary injection
126 Transformer protection RET670 2.2 ANSI
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