DTMR3-TX
Doc. N°
MO-0377-ING
Copyright 2010
Data
01.04.2009
Rev.
0
Pag.
40
of
87
14.14 - Function:
TCS
(Trip Circuit Supervision)
Status
Enab.
No
[No / Yes]
Timers
ts
0.10
s
(0.1
100)
step
0.01
s
14.14.1 - Description of variables
Enab.
: Function enabling (No = Disable / Yes = Enable)
ts
: Trip time delay
14.14.2 - Operation
The relay includes a complete Circuit Breaker Trip Circuit Supervision unit that is associated to the
Contact “15-26” of the “R1” Output Relay.
The contact of “R1” is used to trip the C/B as reported in the drawing here below.
The supervision works when the C/B is closed and recognizes the Trip Circuit as sound as far as
the current flowing exceeds “1mA”.
In case of Trip Circuit Fault detection, the diagnostic relay is operated and the Led starts flashing
(see § Signalization).
To have Supervision also with the C/B open one N/C contact (52b) from the C/B and an external
resistor “R” are needed.
52
R
1mA
V
k
Ω
R
where
R
52
= Trip Coil internal resistance [k
]
V
= Trip Circuit Voltage
W
R
V
2
P
2
R
Designe power of external resistance “R”
Tripping of the function operates a user programmable output relay.
