II20X 375V series surge protectors protect against surges affected
by indirect lightning and direct lightning
The main technical parameters
Model and specification U1-II20X
| Uc(VAC)Maxi continuous operating voltage | 750,420,385,320,275 Vac |
| Up(kV)Voltage protective level | 2.5,1.8, 1.2, 1.4, 1.2 kV |
| (8/20μs)Imax(kA)Maxi discharging current | 20kA |
| (8/20μs)In(kA)Nominal discharging current | 10kA |
| response time | ≤25ns |
| Signal deterioration indication | off-work；on-replace |
| Housing Material | Red thermoplastic material |
| Housing self-extinguishing class | UL94_V0 |
| Temperature range | -40℃～+80℃ |
| humidity range | 5%～95% |
| Elevational | ≤3000m |
| Method of connecting wire | multiple(Connect In Parallel ) |
| Thread Dimensions | 1.5mm2～35mm2 |
| Mounting method | 35mm standard rail installation |
| IP(degree of protection of enclosure) | IP20 |
Product Features:
combination type SPD
The smallest size single phase surge protector of Iimp: 20KA ；
only 27mm width, save space;
Sealed metal air gap technology,high energy electronic trigger
discharge gap, with the ability to block continuous flow
Low output residual；
fast response time (≤25ns);
Installation
◆ Installed at the junction of LPZ1 or LPZ2 zone and LPZ3 zone
using 35mm standard quide rails,connecting copper stranded wires
with 2.5~16mm².
◆Each pole of SPD must be protected-use fuses or miniature circuit
breakers or special backup protectors.
◆Suitable for household distribution boxes,computer equipment,and
information equipment. In front of or nearest socket box of
electronic equipment and control equlipment
Main structure and working principle
◆ SPD is a port, anti-shock protection, indoor fixed installation,
voltage limited type.
◆ SPD has a built-in disconnector. When the SPD falls due to
overheating or breakdown, the disconnector can automatically
disconnect it from the power grid and give an indication signal at
the same time.
◆The visible window displays green when the SPD is working
normally, and displays red when it fails to disengage.
◆1P+N,2P+N,3P+N are composed of 1P,2P,3P SPD+NPEzero-ground
protection modules, which are used in TT,TN-S and other power
supply systems.
The combination type SPD characteristics:
HDU1-II20X series Surge protector device (hereinafter referred to as SPD) is used for power
supply systems such as IT, TT, TN-C, TN-S,TN-CS, etc. for low-voltage AC distribution systems, for
indirect lightning and direct lightning or other A surge of transient overvoltage is protected.
The SPD has a common mode (MC)and differential mode (MD) protection. The SPD complies with
GB/T18802.1/EC61643-Il.
