MC2-30M
Doc. N°
MO-0495-ING
Copyright 2018
Date
17.03.2022
Rev.
2
Pag. 44
of
64
17.20 - Function:
TCS
(Trip Circuit Supervision)
Status
→
Enab.
No
[No / Yes]
Timers
→
ts
0.1
s
(0.1
÷
100)
step
0.01 s
18.20.1 - Description of variables
Enab.
: Function enabling (No = Disable / Yes = Enable)
ts
: Trip time delay
17.20.2 - Operation
The relay includes a complete Circuit Breaker Trip Circuit Supervision unit that is associated to the Contact
“9-10” 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
kΩ
R
−
≤
where
R
52
= Trip Coil internal resistance [k
Ω
]
V
= Trip Circuit Voltage
[ ]
W
R
V
2
P
2
R
⋅
≥
Designed power of external resistance “R”
Tripping of the function operates a user programmable output relay.
