ABB RER670 - Setting Example

The setting parameters are:
LineLength1 Set with length of section 1 in km
RL1 Set with positive sequence resistance of section 1 per phase
XL1 Set with positive sequence reactance of section 1 per phase
REOverRL1 Set with ratio of RE by RL of section 1, this can be derived from positive and
zero sequences impedances as:
1*2
101
1
RL
RLR
REOverRL


IECEQUATION15082 V1 EN-US
Where
R01 is zero sequence resistance of section 1 per phase.
XEOverXL1 Set with ratio of XE by XL of section 1, this can be derived from positive and zero
sequences impedances as:
1*2
101
1
XL
XLX
XEOverXL


IECEQUATION15083 V1 EN-US
Where
X01 is zero sequence reactance of section 1 per phase.
The settings are set in the same way for line sections 2, 3 and so on.
15.10.3.1 Setting example
GUID-F3F5D7EC-1574-45F1-8D54-632D6E66D960 v2
Consider a 1
10kV/16.7Hz system with three transmission line sections (see Figure
167).
Source A
1 2 3
RFLO
Source B
IEC15000299-1-en.vsdx
IEC15000299 V1 EN-US
Figure 167: Single line diagram with three line sections
RWRFLO function should set for the NrOfSections. Since number of transmission
line sections is three, the NrOfSections should also be set to three (3). Table
41
provides the system line specifications for three transmission lines.
Section 15 1MRK 506 375-UEN A
Monitoring
408 Railway application RER670 2.2 IEC
Application manual