UniGear MCC Digital cross sections

Panel cross section with main set of sensors

Panel cross section with second set of sensors

Legend:

1. Protection relay with IEC 61850

2. Current sensor

3. Voltage sensor (cable voltage measurement)

4. Current sensor (optional)

5. Voltage sensor (busbar voltage measurement)

Relion® 615 series

Feeder Protection and Control relay REF615

REF615 is a dedicated feeder protection relay perfectly aligned for the protection, control, measurement and supervision of utility and industrial power distribution systems including radial, looped and meshed networks, also involving possible distributed power generation. (Web page)

Motor Protection and Control relay REM615

REM615 is a dedicated motor protection relay perfectly aligned for the protection, control, measurement and supervision of asynchronous motors in manufacturing and process industry. REM615 offers all the functionality needed to manage motor starts and normal operation also including protection and fault clearance in drive and network disturbance situations. (Web page)

Line Differential Protection and Control relay RED615

RED615 is a phase-segregated, two-end, line differential protection and control relay. With in-zone transformer support and voltage protection, it is perfectly harmonized for utility and industrial power distribution networks. The RED615 relays communicate between substations over a fiber-optic link or a galvanic pilot wire connection. With relation to UniGear Digital this protection relay will be used for more dedicated applications only. (Web page)

REF615, REM615 and RED615 are members of ABB’s Relion® product family and its 615 series.

Relion® 620 series

Feeder Protection and Control relay REF620

REF620 is a dedicated feeder management relay for protection, control, measurement and supervision in utility and industrial power distribution systems, including radial, looped and meshed networks, with or without distributed power generation. (Web page).

Motor Protection and Control relay REM620

REM620 is a dedicated motor management relay for protection, control, measurement and supervision of medium-sized and large asynchronous motors requiring differential protection, and now also synchronous motors, in the manufacturing and process industry. (Web page)

REF620 and REM620 are members of ABB’s Relion® product family and its 620 series.

Relion® 640

REX640 makes protecting all your assets in advanced power generation and distribution applications easy. The fully modular design allows unequaled customization and modification flexibility, and easy adaptation to changing protection requirements throughout the relay life cycle. (Web page)

The IEC 61850 standard

The IEC 61850 standard was released in 2004 as a global international standard representing the architecture for communication networks and systems for power utility automation. The IEC 61850 standard defines the Ethernet technology for substation automation communication. The IEC 61850 standard distinguishes Station bus IEC 61850-8-1 with vertical and horizontal GOOSE communication (real time communication between protection relays) and Process bus IEC 61850-9-2LE for transmission of Sampled Measured Values (SMV) from measurements. Both buses can be physically separated or they can coexist on the same Ethernet network. The standardized data modeling of substation functions including the communication interfaces pave the way to openness and interoperability of devices. (Web page)

Current sensor KECA 250 B1

For dynamic current measurement (protection purposes) the ABB sensors KECA 250 B1, fulfill requirements of protection class 5P up to an impressive value reaching the rated short-time thermal current I_TH (31.5 kA).

With KECA 250 B1 sensors, measuring class 0.5 is reached for continuous current measurement in the extended accuracy range from 5 % of the rated primary current I_P not only up to 120 % of I_P (as being common for conventional current transformers), but even up to the rated continuous thermal current I_CTH (2 000 A).

That provides the possibility to designate the corresponding accuracy class as 5P125, proving excellent linearity and accuracy measurements. (Web page)

Voltage sensor KEVA 17.5 B20

Voltage measurement in voltage sensors is based on the resistive divider principle. The same sensor can be used in all applications up to the voltage level 17.5 kV.

KEVA B sensor fulfills requirements of accuracy class 0.5 for measurement purposes and accuracy class 3P for protection purposes. Transformation ratio is 10000:1. (Web page)

Current sensor KECA 250 B1

Voltage sensor KEVA 17.5 B20

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