Application - ABB RED615 Technical Manual

Section 6
Supervision functions
6.1.5
572
A070785 V2 EN
Figure 304: Functional module diagram
TCS status
This module receives the trip circuit status from the hardware. A detected failure in
the trip circuit activates the timer.
Timer
Once activated, the timer runs until the set value of Operate delay time has elapsed.
The time characteristic is according to DT. When the operation timer has reached
the maximum time value, the ALARM output is activated. If a drop-off situation
occurs during the operate time up counting, the fixed 0.5 s reset timer is activated.
After that time, the operation timer is reset.
The BLOCK input can be controlled with a binary input, a horizontal
communication input or an internal signal of the relay program. The activation of
the BLOCK input prevents the ALARM output to be activated.

Application

TCSSCBR detects faults in the electrical control circuit of the circuit breaker. The
function can supervise both open and closed coil circuits. This kind of supervision
is necessary to find out the vitality of the control circuits continuously.
Figure 305 shows an application of the trip circuit supervision function use. The
best solution is to connect an external R
breaker internal contact. Although the circuit breaker internal contact is open, TCS
can see the trip circuit through R
that the current through the resistance remains small, that is, it does not harm or
overload the circuit breaker's trip coil.
shunt resistor in parallel with the circuit
ext
. The R resistor should have such a resistance
ext ext
1YHT530004D05 D
615 series
Technical Manual