A DC isolator switch is an electrical safety device that manually disconnects itself from the modules in a solar PV system. In PV applications, DC isolator switches are used to manually disconnect the solar panels for maintenance, installation or repair purposes.
In most solar PV installations, two DC isolator switches are connected to a single string. Normally, one switch is placed close to the PV array and the other close to the DC end of the inverter. This is to ensure that disconnection can be achieved at ground and roof level. DC isolators can come in polarized or non-polarized configurations. For DC isolator switches that are polarized, they come in two, three and four pole configurations.

1. Parallel wiring, larger aperture, much easier wiring.

2.  Suitable for distribution box module with lock installation.

3. Arc extinction time less than 3ms.

4. Modular design. 2 poles & 4poles optional.

5. Comply with IEC60947-3(ed.3.2):2015, DC-PV1standard.

Technical Data

Main Parameters	DB32
Rated insulation voltage	1500V
Rated thermal current	32A
Rated impulse withstand voltage	8000V
Rated short-circuit making capacity	2,4	1000A
Rated conditional short-circuit current	5000A
Max. fuse size	80A
Maximum cable cross sections (incl. jumper)
Solid or standard	4-16 mm2
Flexible	4-10 mm2
Flexible (+ multicore cable end)	4-10 mm2
Torque
Tightening torque terminal screws M4.	Nm	1.2-1.8
Tightening torque knob screws M3.		0.5-0.7
Switching on or off torque		0.9-1.3
General parameters
Method of mounting	Single Hole Mounting
Type of knob
Knob positions	OFF at 9 hr, ON at 12 hr
Mechanical life	1000
Number of DC poles	2 or 4
Operation temperature	-40 to +70℃
Storage temperature	-40 to +85℃
Pollution degree	2
Overvoltage category	III
IP rating of shafted and mounting nut	IP66

Dimensions

Installation Size

Wring Diagram

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