Main distribution frame is applicable by various large-capacity programme controlled switching systems, it is used to connect inside and outside cables, patch cords, to test and protect inner equipments and people`s lives. Suitable for large and small-capacity programme controlled telephone exchanges.
1.The frame is made of shaped alloy aluminum , it looks nice in shape and construction;
2.Perfect and reliable over-voltage and over-current protection with sound and light alarm, and self resulming fail protection.
3.Both security block and test block are equipped with dualclip, terminals, when cutover outside lines mat be not disconnected, clipping wires and cutting lines will be finished at the same time, the connecting is quick and reliable.
4.The performance of anti-burn: PPT(UL94V-0) or anti-burn ABS(UL94V-0), combustibility achieved GB/T 5169.7-1985 standard
5.DC puncture voltage: 190-260V
6.Pulse puncture voltage: ≤800V(1KV/us voltage increasing rate)
7.Insulation resistance: 1000MΩ(between any two separable modules)
8.Normal temperature resistance: ≤22Ω(R≤2Ω(over-current protection)
9.Contact resistance: ≤3mΩ
10.Contact resistance between reeds: ≤7mΩ
11.Normal temperature current: I=falling from 500mA to 150mA t<20s
I=falling from 1A to 500mA t<1.3s
I=falling from 2A to 500mA t<0.5s
I=falling from 3A to 500mA t<0.2s
12.Sactive time: I=2.5A t<15s(220V/AC)
13.resistance to voltage: ≥1000V(AC)/1min without breakdown or arc
14.Clip-on life: >200 times