Shanghai Pufa Ha986(Xii)P/T Explosion-Proof Telephone 220v

Shanghai Pufa Ha986(Xii)P/T Explosion-Proof Telephone 220v
Shanghai Pufa Trading Co., Ltd.
Digital Anti-Noise Loudspeaker Station
Phone
Ha986(Xii)P/T
Temperature: -15 – +40°C
Relative Humidity: No More Than 95% (+25°C)
Atmospheric Pressure: 86-106kpa
Ambient Noise: No More Than 115db
Adaptability Of The Dispatcher Or Switch:
A. User Line Dc Open Circuit Voltage: 40-64v
B. User Line Dc Feed Current: 25-50ma
C. Ringing Current Voltage: 75±15v 25hz±3hz
D. Busy Signal
Frequency: 450hz±20hz
Intermittent Ratio: (0.3-0.4) S: (0.3-0.4) S
Level: -8 – -12db
Power Supply: Ac: 220v±10%.
Weight : 10.180 Kg
Ref No : 158108