KTH-33 explosion-proof mining telephonesafe automatic telephone

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2,The Intrinsically safe parameters see table 1: Parameters Item Max input Voltage DC60V Max input Current 30mA The highest fluid flow voltage AC56V Maximum fluid flow current 10mA 3,Electric-acoustic index table 2: Mining simulation line length 0km 5km 10km Send loudness rating(SLR) ≥2 ≤15 ≤18 Receive loudness rating(RLR) ≥-8 ≤2 ≤2 Side sound pressure masking evaluation value(STMR) ≥3 ≥8 ≥5 Ring sound grade:≥80dB. Pulse intermittent ratio:1.6±0.2:1 pulse rate:10±1time/second 1.frequency error≤1.5%. 2.Low frequency group of level:-9dBm±3dB 3.High frequency group of level:-7dBm±3dB 4.Frequency combination, the high frequency component level should be better/higher than low frequency component level high 2±1dB 5.Dimensionmm:112×290×122 6. Weight of the:2.5kg 7. Communication distance:≤10km,cable assembly specification MHYV1*2*7/0.37

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　Jining Hengwang Mining Machinery Co.,Ltd.

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