Sices D-PRO, Technical Manual

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2 D-PRO Protection relay Technical Manual
1.3
D-PRO is a protection relay for the genset. It includes all the necessary functions to acquire
the measurements of the plant and to activate one or more outputs in order to keep the plant
safe in case of irregular values acknowledged. The system is not equipped by a multifunctional
display, but it requires the connection to the DST4602 controller for a complete use with the
visualization of the faults and the measurements of frequency, voltage, current and power of
the plant. In case of “stand-alone” use (without connection to the DST4602 controller), the D-
PRO protection relay carries out the same basic functions, but the information are displayed
through LEDs.
1.3.1
The following table shows the protections implemented:
Protection Description
1 27 Minimum generator's voltage
2 27T Minimum generator's time-dependent
3 32P Maximum active power
4 32Q Maximum reactive power
5 46 Negative sequence
6 47 Wrong phases sequence
7 50 Short circuit
8 50N Neutral short circuit
9 50V Short circuit with voltage-restrained
10 51 Maximum current
11 51N Maximum neutral current
12 51V Maximum current with voltage-restrained
13 59 Maximum generator's voltage
14 59N - 59V0 Maximum residual voltage (homopolar voltage)
15 81O Maximum generator's frequency
16 81U Minimum generator's frequency
17 87G Genset earthing differential protection
18 32RP Active power reverse
19 32RQ / 40 Reactive power reverse / Loss of excitation
20 64 Restricted earth fault / Maximum differential current
1.4
For the appropriate use of this manual it is required knowledge of the use and of the
installation of generator groups.
WARNING
!!!
Every operation must be carried out by skilled personnel. There are dangerous voltages on
the terminals of the device; before carrying out any operation on them, ensure you have
opened the mains and genset circuit breakers or removed the related fuses.