Eaton Residual Current Circuit Breakers with Over-current Protection (RCBOs) - PXK Series The PXK series of residual current breakers with over current protection (RCBOs) from Eaton protect against two types of fault by combining the functionality of an RCD & MCB into a single device. Providing standard residual current device (RCD) protection against earth leakage and electric shock whilst also providing standard miniature circuit breaker overcurrent protection in the form of electrical overloads and short circuits. As this RCBO device protects against both faults it can prevent nuisance trips and can be used on consumer units and mission critical circuits. Features & Benefits • RCD & MCB combination switch
• Single pole
• Sensitivity to pulse current
• Breaking Capacity of 10 kA
• Compatible with standard busbar
• IEC / EN 61439
• Min. Operating temperature: -25 ° C
• Max working temperature: +40 ° C What are the differences between the Tripping Curves? Type A: Instantaneous trip with the electrical current this 2 to 3 times the rated current. Type A RCBOs protect against special forms of residual pulsating DC which have not been smoothed.

Type B: Instantaneous trip when the electrical current through the device is 3 to 5 times the rated current. The type B curve RCBOs are designed for standard circuit protection, typically protection of generators, persons and very long cables.

Type C: Instantaneous trip when the flow-through current is 5 to 10 times the rated current. Type C curve residential and domestic RCBOs are used for higher inrush currents such as in machines and lighting, providing overload protection of circuits and other consumer units.

Type AC: A combination of both A and C types, type AC RCBOs are suited to both domestic appliances and devices sensitive to short circuit.