NOTE
Sizing of the PV generator
The device is designed with a reserve of DC short-circuit current withstand capability. This allows oversizing
of the connected PV generator. The absolute limit for the PV generator is the value of the maximum short
circuit current (lsc max) and maximum open circuit voltage (Uoc max).
7.6.3
Connecting the PV generator
DANGER
Risk of fatal injury due to electric shock!
Severe injuries or death will result if the live connections are touched. When there is solar radiation on the
PV generator, DC voltage will be present at the open ends of the DC cables.
›
Activate the connection power at the switchbox or string combiner with the DC isolator switch.
›
The DC connection is intended exclusively for PV generators. Other sources fall within the scope of im-
proper operation (e.g. batteries).
›
Only touch the PV generator cables on the insulation. Do not touch the exposed ends of the cables.
›
Avoid short circuits.
›
Do not connect any strings with a ground fault to the device.
Preparing the connection of the PV generator
↻
PV generator checked for a ground fault.
↻
Connection cables with 2 x 1 or 2 x 2 strands already on the device.
1 For improved accessibility: Unfasten the DC input plate using the 4 screws [
T_30].
2 Unfasten the cable fitting for the DC connection [ W_46]
3 Remove the sealing plug in the cable fitting used.
4 Remove the outer cladding of the DC cables.
5 Guide the DC leads through the cable fittings.
6 Strip the insulation from DC cables according to M10 ring cable lug so that the
strand and insulation can be pressed into the cable lug shaft.
CAUTION! Risk of fire due to chemical corrosion. Cable lugs must be suitable
for the conductor material and copper busbars being used
5
.
7 Press ring cable lug onto DC wires. When crimping, ensure that the ring cable
lug is rotated in accordance with the final installation position.
NOTE: Danger to life due to a surge in voltage. If the clearance is insufficient,
shrink tubing must be used.
8 Guide the shrink tubing over the uninsulated crimping point and a maximum of
20 mm over the cable insulation and shrink-fit using manual shrink-fitting equip-
ment. However, the shrink tubing must not protrude into the seal of the cable
fitting.
9 For improved accessibility: Secure the input plate using the 4 screws [ T_30 / /
53.10 In-Ibs ]
10 Connect the PV generator.
3
2
1
4
Fig. 17:
Removing the DC input
plate
1
Housing base – DC-side
2
Screws for mounting
3
Input plate
4
Cable fitting
5
When using aluminum cable lugs we recommend using cable lugs with galvanic tin plating or, alternatively, AL/CU ca-
ble lugs with suitable AL/CU washers.
Otherwise, with the electrolytes present (e.g. Condensation water), the aluminum could be destroyed by the copper
bus bars.
KACO blueplanet 87.0 TL3 KACO blueplanet 92.0 TL3 KACO blueplanet 110 TL3 KACO blueplanet 125 TL3
KACO blueplanet 137 TL3 KACO blueplanet 150 TL3
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EN-US
