PZZ-AC level crossing system
General description
- a relay device with electronic elements
- used for level crossings of roads and railways
- the level crossing must be covered by a main signal device according to the state of the level crossing equipment
- automatic control from the interlocking equipment
- equipment state indicated via indication and cover signal to the tractive vehicle
Basic technical description
- complies with CENELEC standards
- control and check circuits are located far from the place of the level crossing in a relay room
- auxiliary elements as transformers, warning boards, bells and barriers are located in the box
- the start and stop of the signalization on the level crossing depends on the state of the SZZ
- the logic function are partially created by the relay circuits and partially by the SZZ logic
- information about its state is displayed on the indication panel, checking and control box or on the JOP monitor
- lifetime > 20 years
Compatibility
- random interlocking or signaling devices
- LDS
