RCD - NL1-100-280/100S, Time Delayed  Residual Current Device, 80A, 100mA,  2-Pole,  

NL1-100-2100/100S,   100A, 100mA,  2-Pole,  Trip Time sensitivity 100mA

Residual Current Device will detect leakage from a circuit, e.g. through contact of conductor / bare wire by a person who is grounded,

and the RCD will then disconnect power from the circuit in a fraction of a second. 

Other RCD Product Codes/Ratings on Web Store

NL1-63 263/30 - 63A 30mA 2-Pole,

NL1-100-280/30 - 80A 30mA 2-Pole

NL1-100-2100/30 - 100A 30mA 2-Pole