10-10-2012, 12:20 PM
SIPROTEC 4 7UM61 Multifunction Generator andMotor Protection Relay
SIPROTEC.pdf (Size: 2.53 MB / Downloads: 172)
Description
The SIPROTEC 4 7UM61 protection relays
can do more than just protect. They also
offer numerous additional functions. Be it
earth faults, short-circuits, overloads,
overvoltage, overfrequency or underfrequency,
protection relays assure continued
operation of power stations. The
SIPROTEC 4 7UM61 protection relay is a
compact unit which has been specially
developed and designed for the protection
of small and medium-sized generators.
They integrate all the necessary protection
functions and are particularly suited for
the protection.
Application
The 7UM6 protection relays of the
SIPROTEC 4 family are compact
multifunction units which have been developed
for small to medium-sized power
generation plants. They incorporate all the
necessary protective functions and are
especially suitable for the protection of:
– Hydro and pumped-storage generators
– Co-generation stations
– Private power stations using regenerative
energy sources such as wind or
biogases
– Power generation with diesel generators
– Gas turbine power stations
– Industrial power stations
– Conventional steam power stations.
They can also be employed for protection
of motors and transformers.
The numerous other additional functions
assist the user in ensuring cost-effective
system management and reliable power
supply. Measured values display current
operating conditions. Stored status indications
and fault recording provide assistance
in fault diagnosis not only in the event of a
disturbance in generator operation.
Protection functions
Numerous protection functions are necessary
for reliable protection of electrical machines.
Their extent and combination are
determined by a variety of factors, such as
machine size, mode of operation, plant
configuration, availability requirements,
experience and design philosophy.
This results in multifunctionality, which is
implemented in outstanding fashion by
numerical technology.
In order to satisfy differing requirements,
the combination of functions is scalable
(see Table 11/1). Selection is facilitated by
division into groups.
Construction
The SIPROTEC 4 units have a uniform
design and a degree of functionality which
represents a whole new quality in protection
and control. Local operation has been
designed according to ergonomic criteria.
Large, easy-to-read displays were a major
design aim. The DIGSI 4 operating program
considerably simplifies planning and
engineering and reduces commissioning
times.
The 7UM611 is configured in 1/3 19 inch,
and the 7UM612 in 1/2 19 inch width. This
means that the units of previous models
can be replaced. The height throughout all
housing width increments is 243 mm.
All wires are connected directly or by
means of ring-type cable lugs.
Alternatively, versions with plug-in terminals
are also available. These permit the use
of prefabricated cable harnesses.
In the case of panel surface mounting, the
connecting terminals are in the form of
screw-type terminals at top and bottom.
The communication interfaces are also
arranged on the same sides.