CNC NV822454 Automatic Changeover Switch 2-pole 220 V 100 A

Automatic transfer switch CNC NV822454 is a 2-pole switching device rated for AC 220 V and 100 A designed to automatically transfer electrical load between two power sources to maintain uninterrupted supply. It supports both automatic and manual operation, fits on a standard DIN rail and meets IEC 60947-6-1 requirements for low-voltage switchgear and controlgear.

Advantages

The CNC NV822454 offers compact dimensions (108 x 96 x 76 mm), reliable switching with transfer times under 50 ms, and a rated conditional short-circuit current of 50 kA. It includes an auxiliary circuit at AC 220 V, is suitable for 50/60 Hz systems, and provides a mechanical life of 5000 cycles and electrical life of 2000 cycles. The unit is lightweight (560 g) and simple to install on a DIN rail.

Suitable for

• Residential backup power systems
• Light commercial buildings and small offices
• Critical equipment that requires continuous power
• Applications where automatic source changeover is needed

Key specifications

• Model: CNC NV822454
• Type: Automatic transfer switch, 2-pole
• Main voltage (control): AC 220 V
• Rated operational voltage (Ue): AC 400 V
• Rated current: 100 A
• Frequency: 50/60 Hz
• Insulation voltage (Ui): AC 690 V
• Rated conditional short-circuit current: 50 kA
• SCPD (fuse): RT16-00-63A
• Rated impulse withstand voltage: 8 kV
• Contact/operating/return/off transfer time: <50 ms
• Installation: DIN rail
• Dimensions: 108 x 96 x 76 mm
• Mechanical life: 5000 cycles; Electrical life: 2000 cycles
• Weight: 560 g
• Manufacturer part number (MPN): NV822454
• Brand: CNC
• EAN: 6942034368500

How to use

Mount the automatic transfer switch on a standard DIN rail in a suitable enclosure and connect the two power sources and the load according to the wiring diagram provided by the manufacturer. Ensure the control (main) voltage supply is AC 220 V for correct automatic operation. After wiring, verify fuse ratings (RT16-00-63A) and perform commissioning tests to confirm correct transfer and return actions under both automatic and manual modes.

Recommendations

Install the device in a dry, ventilated electrical cabinet and ensure all connections are made by qualified personnel. Use proper short-circuit protection and observe the rated limits (100 A, 50 kA conditional short-circuit current). Regularly inspect for wear and test transfer operation to maintain reliability.