Main Parameters

Signal frequency of wheel sensors: the 2 main sensors: f₁=28.00 kHz ± 0.50kHz, f₂= 24.00 kHz ± 0.50kHz, the supplementary sensor: f₃=20.00 kHz ± 0.50kHz

Response time: occupied ≤ 1s free ≤ 2s

Electrical power: AC 220v (187v~242v), 50Hz ± 1Hz

Power consumption: 50w for each calculator unit, 15w for each wheel sensor, 300w max for the maintenance unit.

Longest communication distance between ourdoor devices and indoor units: 4km for single-point mode, 2km for multi-points mode

Longest communication distance between stations for single-point mode: depends on the usage of transfer media. 0.9mm wire point to point direct connetion, 10km max. voice transfer cable, unlimited. optical fiber point to point direct connection, 20km normal, 100km max.

Minimum diameter of the wheels(D) and passing speed (S): D=830mm, S≤350km/h; D=470mm, S≤200km/h; D=350mm, S≤100km/h.

Ground resistance: indoor devices, ≤1Ω; outdoor devices, ≤4Ω.

Lightning proof meets TB/T 3074-2003 Protection Against Lightning Electromagnetic Impulse Of Railway Signaling Devices Standard A.

Electromagnetic compatibility meets TB/T 3074-2003 Electromagnetic Compatibility Tests & Limits Of Railway Signaling Electric Devices Standard A.

Suitable Conditions

Ambient temperature: indoor devices, +40℃ to -5℃; outdoor devices, +80℃ to -40℃

Humidity: indoor devices, ≤90% (+25℃); outdoor devices, ≤95% (+25℃)

Vibration of wheel sensor: acceceleration 100m/s² at a frequency band of 10Hz, 30 Hz and 55Hz.

Shock of wheel sensor: acceceleration 500m/s², impulse duration 6ms

Vibration of outdoor wheel detection unit: acceceleration 20m/s² at a frequency band of 10Hz, 30 Hz and 55Hz.

Air pressure: 70kPa to 106KPa (corresponds to 0 to 3000m above sea level)

Suitable rails

Rail type: 43kg/m, 50kg/m, 60kg/m steel

Sleeper type: wood, concrete, steel

Track bed electric resistance: 0~ ∞ Ω·km

Section type: electrified sections & non-electrified sections