1.Aplication

KTH33 mining explosion-proof intrinsically safe automatic telephone produced according to the standard Q/HX001-2007.

It is a telephone combined with impulse and double audio frequency, configured with a device context HDK mine telephone coupler and output signal to meet the requirements of dispatcher station or exchange can form coal mine safety communication system network. Can be widely used in has the explosive gas environment.

The explosion-proof mark for “ExibⅠ”

2.Main Features

1)This phone shell is made of Aluminium alloy , beautiful outlook, high mechanical strength

2)The domestic new key number plate.
3)Circuit inside the telephone uses the international general integrated circuit, has the advantage of dialing accurate, clear communication, work stability etc

4)Send signals with dual tone frequency and have pulse dialing function (ex-factory general switch in double audio situation)
5)with shockproof, moisture proof, small volume, light weight, strong, durable, easy maintenance, etc

3.Main Technical Data

1) Condition of usage:

Environment temperature: -10~40°C

Relative temperature :<=95%(+25°C)

Atmospheric pressure:(86~106)kpa

Related device: HDK coupler

2)Intrinsically safe parameters

3)index electric and audio

Sound grade: ≥ 80dB

Impulse break-make ratio:1.6±0.2:1

Impulse rate:10±1 times/second

Frequency of double audio

Frequency error<=1.5%

Low frequency group of level :-9dBm±3dB

High frequency group of level :-7dBm±3dB

In the frequency combination, high frequency electrical level should be low frequency electrical level higher about 2±1dB

4)dimension

5)weight:2.5KGS

6)communication distance:<=10km, type of communication MHYV1*2*7/0.37.