NR Electric PCS-9611, Инструкция по эксплуатации

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3 Operation Theory
PCS-9611 Feeder Relay
3-69
Date: 2014-04-08
[50DZ.En]
50DZ.In_Init
[50DZ.En1]
Ia > [50DZ.I_Set]
Ic > [50DZ.I_Set]
Ib > [50DZ.I_Set]
[50DZ.Op]
[50DZ.St]
&
t
OCDZ
0
[BI_52b]
[50DZ.Blk]
Figure 3.20-1 Logic diagram of the dead zone protection
Where:
[50DZ.I_Set] is the current setting of the dead zone protection;
[BI_52b] is the binary input from the auxiliary normally closed contact of the circuit breaker;
“t
OCDZ
” is the setting [50DZ.t_Op], the time setting of the dead zone protection;
[50DZ.En] is the logic setting of the dead zone protection;
[50DZ.En1] is the binary signal for enabling the dead zone protection;
[50DZ.Blk] is the binary signal for blocking the dead zone protection;
“50DZ.In_Init” is the initiation signal such as the external binary input trigger signal or the
relay tripping operation signal, and it can be configured through the PCS-Explorer auxiliary
configuration tool software.
3.20.2 Dead Zone Protection Settings
All the settings of the dead zone protection are listed in the following table. For the information
about the common explanation of the settings, see Section 7.3 .
No. Menu text Explanation Range Step
1 50DZ.I_Set The current setting of the dead zone protection 0.1In~5.0In 0.001A
2 50DZ.t_Op The time setting of the dead zone protection 0~100s 0.001s
3 50DZ.En The logic setting of the dead zone protection 0~1 1
4 50DZ.OutMap
The output matrix setting of the dead zone
protection
0x00000 ~
0xFFFFF
1
3.21 Undercurrent Protection
3.21.1 Undercurrent Protection Theory
This relay provides a one-stage undercurrent protection for monitoring a motor or a capacitor. If
the circuit breaker of the protected equipment is closed and the current is less than the predefined
setting, the undercurrent protection will operate.
The following figure shows the logic diagram of the undercurrent protection.