Lowering headframe masts
The engineered headframe, with its secure three-pulley system, is available with or without our innovative latching system. A single multi-core electric cable has its own independent pulley, meaning it doesn’t become entangled with other cables in the mast.
The Abacus headframe offers flexibility through the opportunity to add a latching mechanism to the headframe, enabling it to be supported while raised and removing strain on the stainless steel cables, for long term benefits.
Latch engages when mobile headframe is raised towards mast head.
Once mobile headframe has docked, latch engages, raising a flag confirming to the operator that it’s secure.
Mobile headframe is raised to disengage latching, before being lowered to ground level for maintenance.
- Headframe supported by three stainless steel cables for longer-term stability than twin cable systems
- Option to install mechanical latching system on three arms, to release strain on cables when headframe is in the operating position
- Headframe supplied prepared ready for installation, complete with three cables looped for dropping into the mast shaft and junction box for the multicore cable mounted on headframe
- Single 275Kg or single 550Kg winch located in the base of the mast. The winch is self-sustaining, with a gravity latch on the input shaft
- A 10mm earth terminal is provided in the base of the mast
- Single multicore cable for all lanterns is located on an independent pulley, stopping multiple cables from becoming entangled inside the mast
- Single multicore - with 18 cores on the 275Kg winch mast (for up to 8 floodlights/lanterns), or 25 cores on the 550Kg model (for up to 12 lanterns)
- A multicore electric cable, with integral signal cables for CCTV and WiFi, is available on request
- Electrical cable is supplied with a plug and socket at lower end. This means you can detach the cable and power the headframe at ground level using a separate extension cable
- A lightweight dual-speed reversible power tool is supplied with its own mounting bracket, which is clamped directly to the body of the mast. A remote hand-held box with non-latching buttons controls the unit, enabling the operator to stand at a safe distance when lowering.
Building your mast
- Identify the correct Abacus floodlight from the lighting design and then…
Select the correct headframe option based on:
- the floodlight arrangement
- external IP65 or internal control gear (internal gear only available with Challenger® 4)
Select the central assembly code determined by:
- mast height e.g. 30m is RLW-HF-30M-xxx-xx
- multicore electric cable, for 275kg winch is 18core (18C) & 550kg winch is 25core (25C); e.g. RLW-HF-30M-18C-XX
- whether the latching system is required (-L) or not (-NL); e.g. RLW-HF-30M-18C-NL
Note: the central assembly is delivered to site fully assembled with stainless steel cables and multicore cable factory-assembled ready for immediate installation.
Select the correct mast structure based on:
- mast height
- winch capacity (determined by headframe choice)
- site wind speed and headframe area
For each height and winch capacity there is a light duty and medium duty mast option, which covers most requirements. Other mast structures for higher wind loads are available on request.
Select any necessary accessories for example:
- the floodlight mounting bracket, required if a floodlight with stirrup is selected (not necessary for the Challenger® 4/RLW model)
- Power tool operating system, dependent on winch capacity
- Lightning rod