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1.2
Application Scope
The SIPROTEC 4 7UM62 is a numerical machine protection unit from the „7UM6 Numerical Protection" series.
It provides all functions necessary for protection of generators, motors and transformers. As the scope of func-
tions of the 7UM62 can be customized, it is suited for small, medium-sized and large generators.
The device fulfills the protection requirements for the two typical basic connections:
• Busbar connection
• Unit connection
Figure 1-2
The integrated differential protection function can be used for longitudinal or transverse generator differential
protection, for protection of the unit transformer or for overall differential protection.
The scalable software allows a wide range of applications, Corresponding function packages can be selected
for each particular application. For instance, alone with the 7UM62 device, it is possible to provide comprehen-
sive and reliable protection of generators from small to medium capacity (approx. 5 MW).
Additionally, the device forms the basis for the protection of medium to large size generators. Combined with
the 7UM61 (also from the 7UM6 series), all protection requirements encountered in practice can be met from
the smallest to the largest machines. This permits to implement a consistent concept for backup protection.
The 7UM62 device is usable for further applications such as
• Transformer protection, as the 7UM62 has in addition to differential and time-overcurrent protection a large
variety of protection functions that allow, for instance, monitoring of the voltage and frequency load.
• Protection of large synchronous and asynchronous motors.
SIPROTEC, 7UM62, Manual
C53000-G1176-C149-7, Release date 03.2010
Typical connections
Introduction
1.2 Application Scope
25
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