3ph typical tripping characteristics
Current (multiples of setting current)
Links BRX180 for independent use
4.
Manual or automatic reset
Set the adjustment dial.4 (fig.2) in the position of arrow as follows:
M= manual reset by means of pushbutton .4 (fig.2)
A= automatic reset
By operating the pushbutton .4 (fig.2) contact (95-96) closes, if tripped.
Automatic reset is not suggested for permanent contact control devices as, when the
tripping occurs, the motor is automatically reenergized after the cooling time of the relay.
5.
Function of the red stop pushbutton
Stop button .2 (fig.2) allow to open momentarily the contact (95-96) but it can't be used
to reset the relays when tripped.
6.
Test before commissioning
Press pushbutton .4 (fig.2) to reset relay. Move the actionator .3 (fig.2) in direction
of arrow marked "TEST", the relay trips. NC contact (95-96) opens and NO contact (97-
98) closes. Trip indicator .3 (fig.2) shows yellow for tripped condition.
7.
Fuse protection
Short circuit protection of the main poles is achieved by a back up fuse as indicated
on rating table.Short circuit protection of auxiliary contacts: 6AgG.
8.
Permissible ambient temperature
-25°C to +55°C temperature compensated.
Links BRP180 for direct connection to GH15NT and GH15PT contactors
Fig. 3
Fig. 4
Fig. 5
Average values at 20°C ambient
temperature, tripping three-phase from cold
condition.
Proceeding from service condition the times
decrease to 20-30% of the characteristic
values.
Specifications are subject to change without notice
RTD180.120
RTD180.180
80-120A
120-180A
BRP180
for direct connection to
GH15NT, GH15PT (fig.5)
RTD180.90
60-90A
without links (fig .3)
Relays type Setting range Links type supplied with O/L relays
Optional links type BRX180 are available for
independent use (fig.4).
