Reserve switching controller, 3 and 4-wire network, 24 ÷ 230V AC, SZR-278

Controlled lines 3 x 400 v + n (four-wire)
number of lines checked 2
supply voltage 24 ÷ 264 v ac
frequency 45 ÷ 55 hz
maximum voltage 450 v ac
lower switch-off time 1 ÷ 15 s
switch-off time upper 0.3 s
line switching time 0.1 ÷ 5 s
generator start-up time 5 ÷ 100 s
generator shutdown time 20 ÷ 200 s
switch-off time in the event of a power failure 0.1 s
main input ON time after voltage recovery 5 ÷ 600 s
number of relay outputs 4
maximum load current 16 A.
maximum coil current of the contactor 2 a
4 × no / nc contact configuration
lower voltage threshold 150 ÷ 210 v ac
upper voltage threshold 270 v ac
connection 2.5 mm² screw terminals
tightening torque 0.4 nm
power consumption 4 va