Dead Zone Protection Settings; Undercurrent Protection; Undercurrent Protection Theory - NR Electric PCS-9611 Instruction Manual

Ia > [50DZ.I_Set]
Ib > [50DZ.I_Set]
Ic > [50DZ.I_Set]
[BI_52b]
50DZ.In_Init
[50DZ.En]
[50DZ.En1]
[50DZ.Blk]
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 " is the setting [50DZ.t_Op], the time setting of the dead zone protection;
OCDZ
[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
1 50DZ.I_Set
2 50DZ.t_Op
3 50DZ.En
4 50DZ.OutMap

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.
PCS-9611 Feeder Relay
Figure 3.20-1 Logic diagram of the dead zone protection
The current setting of the dead zone protection
The time setting of the dead zone protection
The logic setting of the dead zone protection
The output matrix setting of the dead zone
protection
Date: 2014-04-08
t 0
&
OCDZ
Explanation
3 Operation Theory
[50DZ.St]
[50DZ.Op]
Range
0.1In~5.0In 0.001A
0~100s 0.001s
0~1 1
0x00000 ~
1
0xFFFFF
Step
3-69