MC20-CEI
Doc. N°
MO-0431-ING
Microelettrica Scientifica S.p.A. - Copyright 2009
FW 1080.36.03.X
Date 18.11.2011
Rev.
3
Pag. 14
of 35
2.2.5.11 - TCS (Trip Circuit Supervision)
Stato
(Status)
→
Abilit.
[Disabl.(
Disable
) / Abilit.(
Enable
)]
Opzioni
(Options)
→
Non Disp.
Non Disp. (
No Parameters
)
Livelli
(Trip Level)
→
Non Disp.
Non Disp. (
No Parameters
)
Tempi
(Timer)
→
tTCS
1
s
(0.01
÷
50)
step
0.01
s
Stato
(Status)
:
If disable the function is disactivated
tTCS
:
Trip time delay
Operation:
The relay includes a complete Circuit Breaker Trip Circuit Supervision unit that is associated to the Contact
“13-12(+)”.
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 relay associated to “TCS” function trip, and the “Led Trip” is lit-on.
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
Ω
]
V = Trip Circuit Voltage
[ ]
W
R
V
2
P
2
R
⋅
≥
Designe power of external resistance “R”.
