COS 1 – CONVEYANCE OVERSPEED SYSTEM
PRIMARY SAFETY CIRCUIT CONVEYANCE OVER-SPEED DEVICE
With the use of SIL2 rated frequency counters, inductive sensors and either a single or dual solenoid system within the hydraulic pack, COS-1 will automatically de-energise power to the solenoids and therefore release hydraulic pressure from the on-board braking system, should an over-speed condition of the conveyance be experienced.
The EUC ( Equipment Under Control) hydraulic circuit in turn lowers the EUC onto the designated rail braking system. The COS-1 will display the speed at which the EUC is travelling and give indication of either healthy or tripped status of the over-speed system. A Speed Monitor Selection switch is used to interchange between sensors an frequency counters, that are being displayed on the Speed meter. Failure of either one or both of the inductive sensors is monitored and alarmed and will cause the EUC to apply the on-board braking system.
♦ Mine Drift Winders
♦ Mine Shaft Winders
♦ Shaft Sinking Winders
♦ SIL2 compliant in accordance with AS 61508
♦ Compliant with DII EES-008
♦ Extensive self diagnosis
♦ Housed in an IT65 stainless steel enclosure
♦ 24 Volt DC power supply
♦ Low DC power consumption
♦ Motion detection output
♦ Analogue output for speed reference