Heinzmann UK

Skippers Lane Industrial Estate, Middlesbrough TS6 6JB, United Kingdom

Triple voting overspeed protection unit

Two out of three voting system to protect turbo machinery from overspeed
Accurate and repeatable to 0.1%
The design provides protection from nuisance trips
Only individual channels will trip on fault, at least two channels have to agree on fault
Monitors three individual magnetic pickups in three independent modules whose voted output appears on a high integrity dry contact output
Easy to calibrate through maintenance program to set the trip frequency
Easily tested whilst operating through onboard frequency generator housed on board each of the three modules
Hermetically sealed relays and fully isolated frequency inputs guarantee quality and longevity and accuracy of speed measurement
Each unit fully isolated and only connected to the other channels via volt free voting relay contacts
Motherboard PCB is tracked in a voting system so two or more of the individual channel relays must sense overspeed before the common fault contact opens
Built-in test mode and signal generators allow the channel to be tested and tripped