Skema - MV & LV Switchgear

Skema's Intelligent MCC is a modular system with withdrawable units for powering, controlling and protecting low-voltage motors. Thanks to its versatility, it can easily be adapted to suit any plant configuration, electrical layout or installation site. All the operations involved in the insertion and removal of the withdrawable units can be carried out from the front, with no risk of coming into contact with any live parts.

The Switchgear Control Unit (SCU) embedded into the MCC 2000 has up to 16 ports communicating via Rs-485 with Motor and Feeder Control Units using different serial protocols (Modbus, IEC-60870-5-101/103, DNP3) and enables multiple concurrent clients (DCS, ENMCS, local VDU, WiFi laptops) to interface via Ethernet with the switchboard using different protocols (IEC-61850, Modbus/TCP, OPC, IEC-60870-5-104).

Redundant configurations can be supplied thus guaranteeing communication reliability downward to the protections and upward to the control systems (DCS, ENMCS); two Ethernet ports (RJ45 and FO) and one VGA port are standard for every configuration.

Hardwired signals are integrated by remote I/O units, so all types of feeders can be remotely managed.

The SCU's patented firmware allows for the reading and/or setting of the protection parameters and the downloading of the Sequence of Events (SOE) and disturbance recordings, with the response time to DCS commands always below 500 ms.
Local operation and supervision of the switchboard can be achieved by either a touch screen or a wirelessly connected laptop, and the MCC is easily integrated into any DCS and Electrical Network Monitoring System.

Intelligent solution with centralized monitoring and control system

Modular and compact, space-saving design and easy assembly

Focus on quality, safety and reliability

High performance at excellent price levels

Compliant with the most stringent oil and gas standards (Shell DEPs)

Flexibility during the design phase

Fully type-tested by indipendent laboratories

Fully insulated busbar system • Internal arc proof • Tested for seismic load and sinusoidal vibration

Continuity of service and easy maintenance procedure

Standards: CEI EN 60439-1, IEC 61641, IEC 60068-2-6, IEEE 1613,
IEC 61850, IEEE C37.90, IEC 60255

IRIG-B System clock Updating, Decoding and Generation for millisecond-accuracy
timestamping

Operating temperature: -40/+75° C

Protocols available on individual serial ports: DNP3 serial, Modbus Master/Slave,
IEC 60870-5-101/103

Protocols available over Ethernet: Modbus/TCP, DNP3 LAN/WAN,IEC 60870-5-104,
IEC61850, OPC