Key Features

Benefits

• Provides simultaneous four-pole switching for the catalogue's double-string PV arrangement.
• Lockable OFF operation supports controlled maintenance isolation.
• Operator-independent contact action limits switching speed dependence on the user.
• Polarity-independent operation avoids a prescribed PV-supply direction.

Technical Summary

Model SI16-PEL64R-4. Rated thermal current 16A; 16A at 800VDC in DC21B/DC-PV1 duty subject to the stated PEL64R temperature/conductor derating. Rated insulation voltage Ui is 1500V for minimum-IP55 installation, impulse withstand voltage Uimp 8kV and contact distance 8mm per pole. Rated conditional short-circuit current is 5kA with a 40A maximum gL/gG fuse. One-second withstand current and short-circuit making capacity are each 800A for the standard four-pole configuration. Mechanical life is 10 × 10³ operations. Maximum conductor sizes are 4–16mm² solid/stranded and 4–10mm² flexible; terminal screw M4 Pz2; tightening torque 1.7–1.8Nm. Contact resistance is 1.75mΩ per pole and power loss for four poles at 16A is 2W. PEL64R operating temperature is −40°C to +45°C and storage temperature −50°C to +90°C. Dimensions are 180 × 98 × 107mm. The SI16 approvals table marks RoHS, UL508i, UL508, CE, CCC and IEC CB Europe; technical data is stated to IEC 60947-3, VDE 0660 and GB14048.3.

Installation Notes

Use as a DC-side PV switch-disconnector in the four-pole configuration shown by IMO. For the 16A at 800VDC rating, use 2.5mm² conductors and observe the PEL64R derating curve above approximately 35°C; the enclosed-unit ambient limit is +45°C. Tighten the M4 Pz2 terminals to 1.7–1.8Nm and select conductor size within the stated limits.