The SIPROTEC 4 7UM62protection relays can do more than just protect. They also offer numerousadditional functions. Be it earth faults, short-circuits, overloads, overvoltage, over frequency or under frequency asynchronous conditions, protectionrelays assure continued operation of power stations. The SIPROTEC 4 7UM62protection relay is a compact unit which has been specially developed anddesigned for the protection of small, medium-sized and large generators. Theyintegrate all the necessary protection functions and are particularly suitedfor the protection of:-Hydro and pumped-storage generators-Co-generationstations-Private power stations using regenerative energy sources such as windor biogases-Diesel generator stations-Gas-turbine power stations-Industrialpower stations-Conventional steam power stations.

The SIPROTEC 4 7UM62includes all necessary protection functions for large synchronous andasynchronous motors and for transformers. The integrated programmable logicfunctions (continuous function chart CFC) offer the user high flexibility sothat generators, motors, and transformers adjustments can easily be made to thevarying power station requirements on the basis of special system conditions.The flexible communication interfaces are open for modern communicationarchitectures with the control system.The following basic functions areavailable for all versions:-Current differential protection for generators,motors, and transformers-Stator earth-fault protection-Sensitive earth-faultprotection-Stator overload protection-Overcurrent- time protection (eitherdefinite time or inverse time)-Definite-time overcurrent protection withdirectionality, Undervoltage and overvoltage protection-Undervoltage andovervoltage protection-Underfrequency and over frequency protection-Externaltrip coupling- Forward-power and reverse power protection-Negative-sequenceprotection-Breaker failure protection-Rotor earth-faults protection (fn,R-measuring)Motor starting time supervision and restart inhibit for motors

Standard version
Scope of basic version plus:

1. Inadvertent energization protection
2. 100 %-stator earth-fault protection with 3rd harmonic
3. Impedance protection

Full version
Scope of standard version plus:

1. DC voltage protection
2. Overcurrent protection during start-ups
3. Earth-current differential protection
4. Out-of-step protection

Additional version
Available for each version:

1.     2.     3.     4.     Vector jumpsupervision

MONITORINGFUNCTIONS

1. Trip circuit supervision
2. Fuse failure monitor