ABB Switzerland Ltd REG 316*4 1MRB520049-Uen / Rev. C
2-10
· Reset button RESET:
The protection circuit latches when it operates and is reset
by this button upon which the red LED extinguishes.
The protection circuit guards against excessive feedback
from the generator and interrupts the injection for zero-
crossing currents ³ 5 A.
The protection circuit will not reset, if the fault that caused it to
pick up is still present. In such a case, switch off the supply and
check the external wiring for short-circuits and open-circuits.
· Opto-coupler input:
This has the same function as the reset button and can
also be used to disable injection. The latter occurs when
the input is at logical ‘1’. Injection is resumed as soon as
the input returns to logical ‘0’.
Important:
Ensure that the injection voltage is switched off before car-
rying out any work at the star-point. The toggle switch on
the front of the injection unit REX 010 must be set to
“disable” and the yellow LED “disabled” must be lit.
The input voltage, the injection frequency and the opto-coupler
voltage must be specified in the customer’s order and are then
set in the works prior to delivery.
There are no controls inside the unit which have to be set by the
user.
Supply failure
If the green LED ‘READY’ is not lit in the case of version U1 al-
though the correct auxiliary supply voltage is applied, check and
if necessary replace the fuse on the supply unit 316NE61. The
fuse holder is
located at the rear next to the auxiliary supply termi-
nals.
Fuse type: cartridge 5 x 20 mm
2 A slow
Faulty U2 and U3 units must be returned to the nearest ABB
agent or directly to ABB Switzerland Ltd., Baden, Switzerland.
To Next Page
Loading...
