NR Electric PCS-9611, Instruction Manual

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4 Supervision
PCS-9611 Feeder Relay
4-2
Date: 2014-04-08
the current settings of the main CPU module, the alarm signal [Alm_Setting_MON] will be issued.
T
he LED indicator “
ALARM
” will be on at the same time.
4.2.4 Program Version Supervision
If the relay detects that the current program version is not in accordance with the program version
which is defined by the manufacturer, the alarm signal [Alm_Version ] will be issued. The LED
indicator “
ALARM
” will be on at the same time.
4.2.5 Tripped Position Contact Supervision
If the relay detects that the tripped auxiliary contact position is on (i.e., the value of [BI_52b] is
“1”.),
meanwhile any phase current is greater than 0.04In, and such a condition keeps for longer than
10 seconds, the alarm signals [Alm_Device] and [Alm_52b] will be issued, and the LED indicator
“
ALARM
” will be on at the same time.
The logic diagram of the tripped position contact supervision function is shown as below.
Ic > 0.04In
Ib > 0.04In
Ia > 0.04In
Prot.OnLoad
Prot.OnLoad
[BI_52b]
&
[Alm_52b]
10s 0
Figure 4.2-1 Logic diagram of the 52b contact supervision element
4.2.6 Low Pressure Binary Input Supervision
This relay has two binary inputs [BI_LowPres_Cls] and [BI_LowPres_Trp] which are used to
indicate the state of the circuit breaker mechanism.
If the binary input [BI_LowPres_Cls] is energized for longer than 15s, this relay will issue the
alarm signals [Alm_Device] and [Alm_LowPres_Cls];
and the LED indicator “
ALARM
” will be on at
the same time. The auto-recloser and the first remote closing output functions are blocked.
If the binary input [BI_LowPres_Trp] is energized for longer than 5s, this relay will issu e the alarm
signals [Alm_Device] and [Alm_LowPres_Trp] 5s later,
and the LED indicator “
ALARM
” will be on
at the same time. The first remote tripping output function is blocked.
4.2.7 VT Circuit Supervision
The voltage transformer supervision (VTS) feature is used to detect failure of the AC voltage input
circuit of this relay.
The VTS logic in the relay is designed to detect the voltage failure and automatically adjust the
configuration of protective elements whose stability would otherwise be compromised. A time
delay alarm output is also available.

Protection VT supervision
If this relay detects any one of the following two conditions is satisfied, it means that the