Miscellaneous general and special-purpose machinery

Description

Replacement of overstage and understage control system including electrical drives with pluggable and/or switchable spares and integrated control system with multiple desks. Upgrading of brakes and addition of load cells to hoists. Conversion of 6 lighting hoists, 3 acoustic doors and safety curtain from hydraulic to electrical prime movers. Addition of locks to stage podiums and cloth store lift. Provision of design, manufacturing, installation, and commissioning services to: 1) Replace existing hydraulic pump control system including soft starters; 2) Convert safety curtain from direct hydraulic lift to counterweight with electrical hoist and electro-magnetic arrestor; 3) Convert rising acoustic door hoists from rotary hydraulic drive to electrical motor drive; 4) Convert lighting bridge hoists from rotary hydraulic drive to electrical motor drive; 5) Add load cells to the majority of hoists; 6) Add slackwire detection to some hoists; 7) Add electro-mechanical locks to hydraulic cylinders driving stage podiums; 8) Add guide clamping mechanisms to stage podiums to prevent lateral motion when at or below stage level; 9) Add electro-mechanical end-stops to vertical hydraulic cylinders driving the cloth store elevator; 10) Replace distributed electrical drive cabinets for overstage machines complete with cross-pluggable spare drives; 11) Replace electrical drives for SpiraLift driven orchestra elevator; 12) Replace electrical drives for screw-jack driven compensating elevators; 13) Replace electrical drives for revolve; 14) Replace control electronics, and if necessary hydraulic valves, for stage podiums; 15) Replace control electronics, and if necessary hydraulic valves, for cloth store elevator; 16) Add switchable spare drives for all understage machinery; 17) Replace all encoders on all machines; 18) Upgrade all electro-mechanical brakes to use proximity sensor rather than microswitch based actuator motion detection; 19) Replace central control system, servers, network and UPS equipment to include emergency fire control operation of safety curtain and acoustic doors in a power failure; 20) Provide a range of wired and wireless control desks with new cabling infrastructure and control outlets; 21) Decommissioning, strip-out and disposal of redundant equipment and hydraulic systems.