It actualize that all equipments in railway signal transmission system share a set of earthing device together, which avoids the problem of potential unbalance resulted from the temperature & humidity discrepancy along the north-south railways in our country.
1. Admissible long-term working temperature is 70℃.
2. Admissible lowest environment temperature is -40℃.
3. Bending radius is not less than 20 times of cables diameter.
