Function Description 31
787-1668/0000-0080 Electronic Circuit Breaker
Manual
Version 1.1.0, valid from firmware 2.4.0
6.3
Activating Capacitive Loads
High capacitive loads can be applied using the electronic circuit breaker. The
power supply unit providing power to the device must be capable of supplying a
voltage of at least 18V, even at the maximum required current. The required
current can be set using the rotary switch.
The tables below show experimentally determined reference values at an input
voltage of 24 VDC and the maximum trip current:
6.3.1
Reference Values for 787-1668/0000-0080
Table 17: Reference Values for 787-1668/0000-0080
Line lengths
(m) for feed
and return
lines
Making capacity (µF)
with a wire cross-
section of 0.75 mm
2
*
Making capacity (µF)
with a wire cross-
section of 1.5 mm
2
*
Making capacity (µF)
with a wire cross-
section of 2.5 mm
2
*
0
48,000
48,000
48,000
2.5
61,500
70,000
63,300
5.0
83,300
50,000
73,300
10.0
130,000
53,300
73,300
20.0
> 620,000
81,300
63,300
40.0
> 620,000
222,800
91,500
* Capacities determined with a base load of 10 A at the channel.
