This Block Instrument for use in RE & Non-RE sections. a pair of block instruments are connected electrically through overhead or cable to control the movement of trains on a single-line block section in either direction.
Advantages over Token Block Instrument:
1. Less opera_ng _me.
2. No Token exchange.
3. Less physical strain.
4. Problems like token missing, token balancing, census of token,
recoupment of lost token or damaged token etc. are not
encountered.
5. Avoidable deten_on is minimized.
6. Increase sec_on capacity
7. Maintaining normal polarity/Reverse Polarity of Block instrument is
not required.