ABB RET670 Commissioning Manual

X1
R
X
(O/phase)
50%
80%
1
2
3
4
5
6
7
8
9
10
11
80% of RLdFwd
40% of RLdFwd
0.5 x RFPP
12
ANSI05000368-1-en.vsd
13
b
120°
20°
a
c
ANSI05000368 V1 EN
Figure 35: Distance protection characteristic with test points for phase-to-phase
measurements
Table 30: Test points for phase-to-phase loops A-B (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
+ RFPPZx/2
4 X 0.5 x X1
set
R 0.5 x R1
set
+ RFPPZx/2
5 X 0.85 x RFPPZx x tan (LdAngle) LdAngle = angle for the maximal load
transfer
R 0.85 x RFPPZx
6 X RLdFwd x tan (LdAngle)
R RLdFwd
7 X RLdFwd x tan (LdAngle)
R 0
8 X –0.2143 x RFPPZx/2 Exact: 0.8 x RFPPZx/2 (ArgDir=20°)
R 0.8 x RFPPZx/2
Table continues on next page
Section 11 1MRK 504 165-UUS -
Testing functionality by secondary injection
138 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