The speed gauge for mine electric locomotives SR is designed to determine the travelling speed of mine accumulator locomotives in gas- and dust-dangerous mines, as well as for trolley locomotives.
The speed gauge measures the electric locomotive speed and its trail by indirect method providing for direct measurement of railway motor rotation frequency with its calculation in the travelling speed value and covered kilometers.
The speed and trails are measured irrespective of the electric locomotive driving direction.
Technical characteristics
| Serial no. |
Parameter designation |
Unit of measure |
Value |
|
1. |
Determined speed |
km/h |
0-25 |
|
2. |
Maximum readings of odometer |
km |
999 |
|
3. |
Nominal supply voltage |
V |
24/40-80 |
|
4. |
Supply voltage limit |
V |
9-27 |
|
5. |
Limit absolute accuracy (within the range of 0 to25 km/h) |
km/h |
0,5 |
|
6. |
Power consumption |
Wt |
2,4 |
|
7. |
Average error-free running time, minimum |
h |
1500 |
|
8. |
Average time of operable state recovery, maximum |
h |
1 |
|
9. |
Mass |
kg |
8 |
The speed gauge survives under the following operating conditions:
| Serial no. | Designation | Unit of measure | Value |
| 1. | Environmental temperature | оС | 263-308 (-10-+35) |
| 2. | Relative humidity at a temperature of 308 К | % | 98±2 |
| 3. | Dust content | mg/m3 | no more 300 |
| 4. | Mechanical load exposure (group М25 according to GOST 17516,1) sinusoidal vibration: | ||
| – frequency band | Hz |
0,5-100 |
|
| – maximum peak amplitude | m/s2 | 10 | |
| 5. | Single action shocks: | ||
| – peak shocks in horizontal direction with acceleration | m/s 2 | 30 | |
| – duration | m/s | 2-20 | |
Components of the product
| Serial no. | Designation |
Quantity, pcs |
Explosion protection level and kind |
Protection level |
Purpose |
| 1. | Sensor
SR .20.000 |
1 | RV1V | IP54 |
Formation of rectangular pulses, with frequency proportionate to the rotation speed of railway motor |
| 2. | Indicating unit | 1 | RV1V | IP54 |
Displaying in digital form of electric locomotive travelling speed, trail (when the electric locomotive stops) |
The sensor is installed in the gear box cover, and the observer (indicating unit) – in the locomotive cabin wherever convenient for observation.
Permissibility of the speed gauge is ensured by the type of protection “explosion-proof enclosure” according to GOST 22782.6-81 and is ensured by encasing the electric parts, with the case withstanding explosion pressure from inside and eliminating transfer of explosion into environment.