Application:
CAU1 Surge protector devices(SPD) protection against surge current resulted from direct or indirect lighting strike or similar surge voltage. SPD is applicable to circuit with rated voltage up to 400V-, rated frequency 50/60Hz.
The products using metal oxide varistor, designed to protect both phase and neutral ine, is of high electricity resistance under normal operation. In case of surge current or voltage caused by lightning strike or similar, SPD functions quickly to conduct the surge voltage/current to earth and thus effectively prevent the downstream equipments of its protected line from destruction.

The SPD resume its high electricity resistance to secure normal operation of the protected power network without presence of the surge voltage.

Construction and feature:
Plug-in type function unit makes easy replacement
On-off indicating window
Quick response less than 25ms

Technical data
Pole No. 1, 2, 3, 4P
On-off indicating window: Green: Normal function, Red function less
Fequency: 5-/60Hz

Model:
CAU1-A 10KA(Deep yellow)
CAU1-B 20KA(Light yellow)
CAU1-C 40KA(Light grey)
CAU1-D 60KA (Brown)
CAU1-E 70KA(Red)

Category	CAU1-D		CAU1-C		CAU1-B
Max.continuous operating voltage Uc(V)	275/320/385/420-50/60Hz
Voltage protection level Up (Kv)	1.0,1.2,1.5,1.8,2.0,2.5,3.0
Norminal discharge current In(kA) (8/20μs)	5	10	20	30	40	50
Max.discharge current Imax(kA) (8/20μs)	10	20	40	60	80	100
Response time (μs)	≤25
Power withstand (WfA) (2ms)	200
Ambient temperature	-40~+80ºC
Function unit colour	yellow		white	red
Min.terminal connection(mm²)	phase,neutral 2.5, earth 4