ABB RET670 Installation And Commissioning Manual

Secondary test.....................................................................184
Check the activation of the voltage control operation...........184
Check the normal voltage regulation function......................185
Check the undervoltage block function................................186
Check the upper and lower busbar voltage limit..................186
Check the overcurrent block function...................................186
Single transformer................................................................187
Parallel voltage regulation....................................................188
Completing the test..............................................................193
Single command SingleCommand16Signals............................193
Scheme communication.................................................................193
Scheme communication logic for residual overcurrent
protection ECPSCH ..................................................................193
Testing the directional comparison logic function.................193
Completing the test..............................................................195
Current reversal and weak-end infeed logic for residual
overcurrent protection ECRWPSCH
.........................................195
Testing the current reversal logic.........................................195
Testing the weak-end infeed logic........................................195
Completing the test..............................................................197
Logic...............................................................................................197
Tripping logic SMPPTRC ..........................................................197
Three phase operating mode...............................................198
1ph/3ph operating mode......................................................198
1ph/2ph/3ph operating mode...............................................199
Circuit breaker lockout..........................................................200
Completing the test..............................................................201
Monitoring.......................................................................................201
Event counter CNTGGIO...........................................................201
Event function EVENT...............................................................201
Metering..........................................................................................201
Pulse counter PCGGIO.............................................................201
Station communication...................................................................202
Multiple command and transmit MultiCmd/MultiTransm............202
Remote communication..................................................................202
Binary signal transfer BinSignReceive, BinSignTransm............202
Section 14 Primary injection testing...............................................205
Primary injection testing.................................................................205
Voltage control VCTR................................................................205
Load drop compensation function, LDC...............................205
Testing the LDC function......................................................206
Voltage control of Parallel Transformers..............................208
Minimum Circulating Current (MCC) method.......................208
Table of contents
8
Installation and 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