KTA152 mining safety coupler

The KTA152 mining safety coupler adopts a 19 inch 3U standard chassis and a board type structure, which can flexibly configure the number of boards according to actual needs. Each coupler is independent of each other, and a single circuit failure does not affect other circuits, and a single board failure does not affect other boards.

Mining safety coupler is a device that converts the hanging signals, dialing pulse signals, dual audio signals, emergency call signals, etc. sent by intrinsically safe telephones into signals that can be recognized and accepted by the dispatch switch.

Convert the ringing signals, emergency call signals, and hanging up signals sent by the scheduling switch into intrinsic safety signals that can be accepted by the intrinsic safety telephone.

Convert the feed voltage sent by the dispatch switch into a feed voltage that meets the requirements of intrinsic safety telephones. Transmit bidirectional voice signals. Realize bidirectional conversion of various detection signals between scheduling switches and intrinsic safety telephones.

Product Features:

Connection: Equipped with dedicated cables to connect the output of the dispatch machine to the non safety input of the coupler, without the need for a separate distribution frame

Appearance: 19 inch 3U standard chassis, board type design, no need to adjust the connecting wires when replacing the board

Explosion proof type: Ground output intrinsic safety type, explosion-proof mark: [Ex ib] Ⅰ Mb.

Specification: Single board 4-channel passive coupler, with a maximum of 64 channels per frame.

Safety Sign Number: MHC210057

Explosion proof certificate number: CCCMT21.0060

Appearance dimensions: 481mm (width) × 337mm (depth) × 133mm (height)

Net weight at full capacity: 8.6kg

Technical parameters:

Environmental conditions

The coupler should be able to operate normally under the following conditions:

a) Environmental temperature: 0 ℃ to+40 ℃;

b) Average relative humidity: ≤ 90% (+25 ℃);

c) Atmospheric pressure: 86kPa~106kPa;

d) Places without significant vibration and impact;

e) A safe place without methane, coal dust, etc. on the ground.

The worst storage and transportation conditions that the coupler should be able to withstand are:

a) High temperature:+60 ℃;

b) Low temperature: -40 ℃;

c) Average relative humidity: 95% RH;

d) Vibration: Acceleration of 20m/s2;

e) The peak acceleration of the impact is 300m/s2.

User line conditions

The maximum distance between the coupler and the underground telephone is 10km (the model and specification of the mining cable are: MHYAV, MHYBV, MHYA32. The wire diameter is 0.8mm) The user line parameters are:

a)   Direct current resistance of conductive wire core: ≤ 36.7 Ω/km;

b)   Capacitor: ≤ 0.06 μ F/km;

c)   Inductance: ≤ 800mH/km;

d)   Minimum insulation resistance: 15k Ω~20k Ω.

Input and output parameters of coupler

1. Non intrinsic safety input parameters

a)   Maximum DC input voltage: ≤ 60V;

b)   Maximum DC input current: ≤ 60mA;

c)   Maximum input voltage of ringing current: ≤ 90V;

d)   Maximum input current for bell current: ≤ 90mA.

2. Intrinsic safety end output parameters

a)   DC maximum open circuit voltage: ≤ 60V;

b)   Maximum DC short-circuit current: ≤ 34mA;

c)   Maximum open circuit voltage of ringing current: ≤ 60V;

d)   Maximum short-circuit current of bell current: ≤ 38mA.