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 steel , it looks nice in shape and construction; Floor frame;
2、Perfect and reliable over-voltage and over-current protection with sound and light alarm, and self resulming fail protection;(With Protector unit)
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

CWMDFCS2 MAIN DISTRIBUTION FRAME Product Description

Product description: 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

Free standing Four Alum barres Frame for DDF/MDF blocks

Wall mounted two alum barres frame for DDF/MDF blocks

Type: CWDDF-CK 16 Product Name: 120O DDF unit(16 systems)

Product Description ... 1?Environment condition:-5-40 degree Celsius ;Relative humidity <85% (+30 degree Celsius) ;Atmospheric pressure: 70-106Kpa 2?Material : stainless steel and cuprum, cuprum gold plating over nickel 3?The performance of anti-burn: PPT (UL94V-0)or anti-burn ABS (UL94V-0),Combustibility achieved GB/T 5169.7-1985 standard ; 4?Construction features: adopt modularization design , Having features of elegant outlook and high endurance; 5?Pulling-out force: tin bronze and silver plating (20-40 uinch), pulling-out force not less than 25N ; 6?Intermediate resistance between the reed terminators: no more than 7m ohm between intermediate reed under the standard examination condition ; 7?Intermediate resistance: no more than 3m ohm under standard examination condition ; 8?Performance impedance:120O(balance) 9?Work rate:2Mb/s 10?Insulation resistance:1000MO/500V(DC) 11?Resistance to voltage: no breakdown or arc for 1 minute under 1KV(DC) 12?Crosstalk ratio:=60dB(50KHz-210MHz) 13?Plug-in loss:=0.4dB (50KHz-210MHz) 14?Back wave loss:=18dB (50KHz-210MHz) 15?Life: durability 200 cycles

Type: CWMDF112A-C Product Name: CONNECTION BLOCK

Product Description ... 1?Test connection block is mounted on the horizontal side of the MDF used for termination between jumper wire and internal exchange cable, 2?It is a normally closed type contact, when the disconnection plug is inserted into the test block, the internal cable and jumper wire will be disconnected, the test plug with cord can be used to test internal line and external line independently, 3?The protection plug can be used to lable and pretect important or special subscribe line, 4?Each unit of test connection block is of max capacity of 128L, which is composed of horizontal module, panel, connection axes as well as dustproof cover etc, both of the internal side and jumper wire side have the cross board. 5?The performance of anti-burn: PPT(UL94V-0) or anti-burn ABS(UL94V-0), combustibility achieved GB/T 5169.7-1985 standard

Type: CWMDF112A-P Product Name: PROTECTOR BLOCK

Product Description ... 1?Protection connection block is mounted on the vertical side of MDF, which is used for termination between external line cable and jumper wire, it can protect the MDF against over voltage and over current, 2?Perfect and reliable over-voltage and over-current protection with sound and light alarm, and self resulming fail protection; (With Protector unit) 3?it is designed in such structure: the line side and the jumper wire side is disconnected before the protector is inserted into the protection connection block, they will be connected after inserting the protector, 4?when the line side suffer danger, only pull out the protector, the exchange side will be disconnected with the outside line, 5?The performance of anti-burn: PPT(UL94V-0) or anti-burn ABS(UL94V-0), combustibility achieved GB/T 5169.7-1985 standard 6?Each protection block has termination capacity of 100 pairs and consist of vertical module, 100 alarm plug, back-mounting frame etc. both the outside line and the jumper wire side have the wiring board.

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