Differential blocksare mechanically designed to prevent mismating between the block and the circuit breaker: the rating of the block must always be equal to or greater than that of the circuit breaker. The plastic clamp on the side allows faster mounting of the block on the circuit breaker, and a push-button prevents possible tripping.

It is used to protect human health in the event of a ground fault (electrical leakage) or phase-to-ground electrocution, thus also providing protection against macro electrical shock, both direct and indirect, on exposed persons.

The AC-type differential lock, works only with alternating current. Almost all systems for civil use fall into this type.

DDA800 differential blocks can be coupled with S800 series circuit breakers up to 100 A to realize the function of magnetothermal differential protection:

Specifications:

• Rated voltage 230/400V AC 240/415V AC 400/690V AC
• Rated operating voltage: 400/690 V
• Rated insulation voltage (Ui): 690 V
• Impulse withstand voltage (Uimp): 6 kV
• Maximum peak current: 0.25 kA
• Type of leakage current: alternating current
• Rated frequency (f):50 60 Hz
• Power loss: 10.5 watts
• Number of poles:4
• Operating characteristic: Instantaneous
• Connection capacity: Rigid 6 50 mm²
• Flexible 6 70 mm²
• Ambient temperature: -25 to 60 °C
• Ambient temperature: Operating -25...60 °C
• Degree of protection: IP2X
• RoHS declaration: According to EC Directive 2011/65/EC
• Width in number of modular intervals: 6.5
• Product width: 117 mm - Product height: 108.2 mm - Product depth: 82.3 mm
• Product net weight: 0.460 kg