ABB RET670 Installation And Commissioning Manual

If a block/unblock command is sent from remote to function, while
the IED is shut down, this command will not be recognized after
the start up, thus the command that was sent prior to the shut down
is used. In such cases, where there is a mismatch, the user is
advised to make a complete cycle of block/unblock operations to
align the statuses.
13.11.3 Interlocking
Prepare the IED for verification of settings as outlined in section "Overview" and
section "Preparing for test" in this chapter.
The interlocking function consists of a bay-level part and a station-level part. The
interlocking is delivery specific and is realized by bay-to-bay communication over
the station bus. For that reason, test the function in a system, that is, either in a
complete
delivery system as an acceptance test (FAT/SAT) or as parts of that system.
13.11.4 Voltage control VCTR
Prepare the IED for verification of settings as outlined in section
"Overview" and
section "Preparing for test" in this chapter.
The automatic voltage control for tap changer, single control TR1ATCC is based
on a transformer configuration that consists of one tap changer on a single two-
winding power transformer.
The automatic voltage control for tap changer, parallel control TR8ATCC, if
installed, may be set to operate in Master Follower (MF) mode, or Minimise
Circulating Current (MCC) mode. The commissioning tests for each parallel
control mode are addressed separately in the following procedure.
Secondary injection of load current (I
L
) and secondary bus voltage (UB) equivalent
quantities is required during installation and commissioning tests. The test consists
mainly of:
1.
Increasing or decreasing the injected voltage or current at the analogue inputs
of the IED.
2. Checking that the corresponding commands (Lower or Raise) are issued by the
voltage control function.
Setting confirmation is an important step for voltage control in the installation and
commissioning phase to ensure consistency of power systems base quantities, alarm/
blocking conditions and parallel control settings for each transformer control
function.
Before starting any test, verify the following settings in PCM600 or the local HMI
for TR1ATCC, TR8ATCC and TCMYLTC and TCLYLTC.
Section 13 1MRK 504 088-UEN C
Verifying settings by secondary injection
182
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