VMC DREC Compact, Instruction Manual

The 

DREC-C

 allows one mode of

automatic reclosing:

-

Reclosing

by insulation

, the device does not reclose until the leakage has disap-

peared.

4�4�2�1�- Reclosing by insulation

Following a time delay after a disconnection due to an RCCB trip, the 

DREC-C

 makes a meas

-

urement to check whether there is a leakage current. If there is none it begins to reclose.

The 

DREC-C

 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 5

.

Table 5: Delay and Restart Times�

Reclosures

1

2

3

Delay

Restart

Delay

Restart

Delay

 Restart 

<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.

4�4�2�2�- Restarting the reclosing system meter

There are two ways to restart the internal reclosing system meter:

-

Manually

, by moving the mode selector switch from ON to OFF position  and back to

ON.

-

Automatically

, when the restart time elapses after the last reclosing without tripping

again.

4�4�2�3�- Restart in case of blocking

In case of blocking of the device, the start-up sequence is:

1�-  

Check installation.

2�- 

 Put the mode selector switch in Manual Mode (OFF).

 3�-

  Lift the RCCB cover.

 4�- 

 Put the RCCB contact in ON mode.

 5�-

  Lower the RCCB cover.

 6�-

  Put the mode selector switch in Manual mode (ON).

Note:

The switch has an M2 hole where you can attach a seal or a padlock to block access to 

the RCCB and any other attempts at manual reclosing (

Figure 7

).

14

DREC-C 

Instruction Manual