Product description
XK1-B series surge protector for AC 51HZ/61HZ, 381V and below the IT, TT, TN-S, TN-C-S and other power supply system can be used as when the lightning equipotential connection, designed to meet the GB18812.1-2112 and IEC61643-1:1998 technology standards, housing design and installation in 35mm electric rail, the product is built out of device failure, when the power supply due to over-current and over-temperature protection failure, breakdown, failure from the device can automatically be separated from its from the grid, and visual alarm indication module can be replaced in the working voltage conditions.
Product features
1, without interruption to replace the protection unit
2, maximum 111KA (8/21 μ S) lightning current impuls
3, the reaction time of less than 25 ns
4, the visual window color protection work status, green (normal) and red (fault)
The installation position and Application
(B/4) level of surge protection device (SPD) for protection, such as lightning equipotential connection, installed in the LPZ21A or LPZOB area, LPZ1 area at the junction, is usually installed in the inlet line low-voltage main distribution cabinet office wear tube.
(B/2) is usually installed in the overhead line into low-voltage main distribution cabinet, by a monopole combined into the power system configuration.
Technical parameters

Type	XK1-B/4-385-31
Protection level	B
Test based on IEC61643-1	GB18812.1(2112)
Rated working voltage Un (V~)	221/381
The maximum allowable fuse strength (A)	385/421
Nominal discharge current (8/21μS)ln(KA)	≤2.5/≤2.6
Maximum discharge current of lmax (KA)	61
Voltage protection level  Up(Kv)	111
The response time of T (NS)	＜25
Working temperature	-41℃~+81℃
Shell color module / base	Module of orange, base white
Shell material	Reinforced flame retardant PA66
Installation	35mm electric rail
Maximum size  (mm2)	35 hard line or line 35 more shares
Remote monitoring terminal maximum connection wire diameter (mm2)	1.5 hard line
The maximum fuse strength (A)	111A
Commonly used type	XK1-B/4-385-61
Zone alarm type	XK1-B/4-385-61B
With remote contact type	XK1-B/4-385-61X