ABB REB500 Additional features Distributed busbar protection

Additional features

Self-supervision

All the system functions are continuously monitored to ensure the maximum reliability and availability of the

protection. In the event of a failure, incorrect response or inconsistency, the corresponding action is taken to

establish a safe status, an alarm is given and an event is registered for subsequent diagnostic analysis.

Important items of hardware (e.g. auxiliary supplies, A/D converters and main and program memories) are

subjected to various tests when the system is switched on and also during operation. 

A watchdog continuously monitors the integrity of the software functions and the

exchange of data via the REB500 process bus is also continuously supervised.

Extension of the system

The system functions are determined by software,configured using the software configuration tool.

The system can be completely engineered in advance to correspond to the final state of the station. 

The software modules for new bays or features can be activated using

the HMI500 when the primary plant is installed or the features are needed.

Additional system functions, e.g. breaker failure or end fault protection can be easily activated at any time without extra hardware.

Resetting the trip commands/signals

The following resetting modes can be selected for each binary output (tripping or signal outputs):

· Latches until manually reset

· Resets automatically after a delay

Inspection/maintenance

A binary input can be assigned that excludes a bay unit from evaluation by the protection system. 

It is used while performing maintenance or inspection activities on the primary equipment respectively.

Redundant power supplies (Optional)

The central unit may be ordered with a redundant power supply.

Time synchronization

The absolute time accuracy with respect to an external time reference depends on the method of synchronization

7. Requirements

Optical fiber cables

A distributed busbar protection layout requires optical fiber cables and connectors with the following characteristics:

· 2 optical fiber cores per bay unit

· glass fibers with gradient index

· diameter of core 62.5/50 µm, sheath 125 µm

· maximum permissible attenuation ≤ 8 dB/6dB

· LC connector (for 62.5/50 µm optical fibers)

· rodent protected and longitudinally waterproof if in cable ducts

Please observe the permissible bending radius when laying the cables.

The following attenuation figures are typical values which may be used to determine an approximate attenuation

balance for each bay:

Isolator auxiliary contacts

Auxiliary contacts on the isolators are connected to binary inputs on the bay units and control the status of the

busbar replica in the numerical busbar protection.

One potentially-free N/O and N/C contact are required on each isolator. 

The N/O contact signals that the isolator is ‘CLOSED’ and the N/C contact that the isolator is ‘OPEN’.

During the closing movement, the N/O contact must close before the isolator main contact gap reaches its flashover point.

ABB 500TTM02 1MB150021R01161HF930712X010

ABB 500TRM02 1MRB150011R1

ABB 500TRM02 1MRB150011R0001

ABB 500SCM01 1MRE450004R1

ABB 500SCM01 1MRB200059/C 1MRB15004R0001

ABB 500SCM01 1MRB150004R0001 1MRB200059/C

ABB 500PSM03 1MRB 150038 R1 894-030375D 136-011100H

ABB 500PSM03 1MRB 150038 R1 894-030375D 136-011100H

ABB 500PSM02 1MRB150015R1 AD-272.100.20-01 AZ:C

ABB 500PB101 1MRB178009R0001 1MRB200064/C

ABB 500MTM02 1MRK001967-AA 1HDF 930512 X010

ABB 500MTM02 1MRB150020R1102 1HDF 930512 X010

ABB 500MTM02 1MRB150020R0712 1HDF 930512 X010

ABB 500MBA02 1MRB150003R0003 1MRB200053/M

ABB 500MBA02 1MRB150003R000/B

ABB 500MBA01 1MRB150003R0002 1MRB200053/L

ABB 500CSP04 HE401314/0002 1MRB150051R2

ABB 500CPU05 1MRB150081R1/E

ABB 500CPU03 1HDF700003R5122

ABB 500CMP04 HE401314/0001 1MRB150051R1

ABB 500CIM05 1MRB150077R1/B

ABB 500BOM01 1MRB150023R0002

ABB 500BIO01 1MRB150005R1/J

ABB 500BIO01 1MRB150005R0001 1MRB200060/E

ABB 500BIM01 1MRB160024R0002