CIRCUTOR REC3 Series - Manual (Page 18)

Figure 12: REC 3 in automatic mode, with mode selector switch at ON�
The REC 3 allows two modes of automatic reclosing :
- M Mode, by insulation, (REC 3 of 30 mA) the unit does not reclose until the leakage
has disappeared.
- T Mode, by time, (REC 3 of 300 mA) the unit reclose the system, independently of the
leakage.
5�2�1�- RECLOSING DEVICE BY INSULATION, M MODE
Following a time delay after a disconnection due to an RCCB trip, the REC 3 makes a measure-
ment to check whether there is a leakage current. If there is none it begins to reclose.
The REC 3 attempts a maximum of 3 measurements to check the leakage current; following
this the unit stays locked and does not automatically reclose.
If the time between a reclosure and the next trip is greater than the restart time, the reclosing
attempts start over at zero.
The delay and restart times depend on the number of attempts the reclosing device has made,
as shown in Table 3�
Table 3: Delay and Restart Times�
Reclosures
1 2 3
Delay Restart Delay Restart Delay Restart
REC3 <3 sec. 10 sec. 20 sec. 20 sec. 180 sec. 60 sec.
The leakage current will be supervised by measuring the resistance downstream of the
tripped RCCB.
18 Instruction Manual
REC 3 - REC 3C