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Application
KTH123 mining intrinsic safety telephone (anti-noise type) is the telephone with double audio and impulse. It is widely used in the environment of explosive gas (methane); the rated working voltage is 48V. The telephone can work together with the telephone coupler KTA104 and form a safe telecom system in the coal mine downhole. This telephone is key-pressing type.
Features
This machine body is formed by injection pressing of plastics with beautiful design and high mechanical strength. The circuit of machine adopts international general IC, having features of accurate signal, clear call, stability, small volume, light weight, strength, durability, easy maintenance.
Main technical parameters
|
Type |
KTH 123 |
|
|
Rated voltage（V） |
DC 60V |
|
|
Rated current（mA） |
35 |
|
|
Ring bell voltage(V) |
60 |
|
|
Ring bellworking currtent(mA) |
35 |
|
|
Call performance（Reference equivalent） |
Impersonal send |
10km artificial line≤+18dB |
|
Impersonal receive |
0km artificial line≤+2 |
|
|
Ring sound grade (dB) |
≥90 |
|
|
Cable O.D.(Φmm) |
6.5 |
|
|
Outline dimension L×W×H（mm） |
190×310×135 |
|
|
Weight（kg） |
3 |
|
The distance between the KDH220/45 electrical source and the telephone should be no more than 10km. (The mining cable model and specifications should be MHYAV1, MHYBV, and MHYA32. Cable diameter: 0.8mm)