KATEK Steca coolcept fleX - Preparing AC Connection; Residual Current Circuit Breaker (RCD); AC Cables

EN
18 762.885 Z05 2012 coolcept_fleX, coolcept³_fleX
5.3 Preparing AC connection
DANGER
Voltage
There is a risk of death by electrocution.
►
Follow the safety instructions and warning notices in chapter 5.1.
►
Never disconnect nor connect the plug connection while the AC connec-
tion is live.
►
Install the circuit breaker prior to any work on the AC connection.
5.3.1 Residual current circuit breaker (RCD)
Due to its design, the inverter cannot cause a DC fault current. Therefore, the installation of
a Residual Current Device (RCD) is not necessary. If local installation regulations or the
power supply company require the installation of an external residual current device (RCD)
in the AC connection line, a type A residual current device (RCD) is sufficient according to
IEC 62109-1. The tripping current should be rated at least 100 mA or higher.
If several inverters are installed in a system, a corresponding earth-leakage circuit breaker
(RCD) must be installed for each individual inverter.
5.3.2 AC cables
Suitable cables
• UL AWM Style 21098, size No. AWG 14
• UL AWM Style 2464, size No. AWG 16-22
Inverter, 1 phase
Cable cross section
AC cable
Power loss
(with 10 m cable length)
Circuit breaker
StecaGrid 1511 1.5 mm² 10 W
B16 2.5 mm² 6 W
4.0 mm² 4 W
StecaGrid 2011 1.5 mm² 18 W
B16 2.5 mm² 11 W
4.0 mm² 6 W
StecaGrid 2511 2.5 mm² 16 W
B16
4.0 mm² 11 W
StecaGrid 3011
StecaGrid 3011_2
2.5 mm² 25 W
B16 or B25
4.0 mm² 15 W
StecaGrid 3611
StecaGrid 3611_2
2.5 mm² 35 W
B25
4.0 mm² 23 W