TCS has vast experience of protection and control systems.

Protection - TCS can implement circuits for transformers, generators, busbars and electrical machines which are associated with protection.  The protection installed on an industrial power system has to cope with more difficult conditions than the protection of any other kind of power system.  Variable fault levels, altering switching arrangements and large motors may all impact on the protection relays fitted and settings required. Conventional (electromechanical and static) relays have been used successfully for separate protection functions and in more recent years micro-processor based multifunctional relays are becoming universally popular as they provide almost unlimited flexibility in protection applications.

Typical relay device numbers and functions previously supplied by TCS:

Control - Once the protection requirements have been defined it is necessary to ensure that the correct switching devices are used for the application and that they are reliably opened, closed and tripped.  Simplicity in design is vital to the reliability of a control circuit as usually the tripping circuit may operate only once, and then at a time where conditions are abnormal, and therefore there must be no risk of failure.  Usually on a DC UPS supply, this may be a simple case of an IDMT relay tripping its own suitably rated circuit breaker or may involve complex inter-tripping or auto re-closing schemes.  TCS can assist in the development of such varying complexity control schemes.  TCS can supply Power Transformers (in package substation format if required), size and supply UPS systems, fit trip circuit supervision relays and implement pilot wire systems as well as many other protection and control devices.

Relays types previously used:

• GEC Midos
• Alstom Micom
• Multilin SR range
• Reyrolle
• CEE
• ABB