The TPSK-SAFE provides electrical disconnection from the power supply upon impact of a column, post or sign, even if the supply cable is tethered. Electrical disconnection is achieved via the disconnection of the Snatch Plug system.
The TPSK-SAFE ensures that when a column/post/sign is knocked over the supply to it is terminated. It is designed for use with all passive safety products but particularly recommended for NE (non energy absorbing) items. TOFCO Passive safe electrical disconnection systems comprise the following five main components, with a variety of options to meet your specification.
|Enclosure For Cable Sizes Up To 16mm2 SWA||
||Enclosure For Cable Sizes 25mm2 and 35mm2 SWA|
The TPSK will come complete with glands for looping cables and column take off cable, plus a fourth cable option to sign or bollard, where required.
The TPSK “Snatch Plug Cable System” is a 3 pin 16amp rubber sheathed male (2 metre length) & female (4 metre length) snatch plug assembly in standard format – other lengths available upon request. It is designed to disconnect if the Passively Safe Support Structure i.e. column or signpost, is knocked over. A drawstring is fitted to the female end of the snatch connector to allow the cable joint to be pulled up to the column door for visual inspection. Installation guidelines need to be followed regarding the clamping of the excess cable within the chamber and the fixing of the cable within the passive structure.
The termination box illustrated is manufactured from impact, corrosion and UV resistant glass reinforced polyester compound. The screw-on lid allows ease of installation, locked with the special key prevents unauthorised tampering. The box offers 1,2,3 and 4 way versatility and comes standard configured for three way cable termination, plus one blank plate option for an additional snatch plug cable connection.
An internal earth ring, connecting the four cable gland entries and steel din rail, achieves Earth continuity. A bonded steel back plate secures the din rail, which carries a variety of cable terminals to allow the termination of the incoming and outgoing cable, whilst the TOFCO double pole switch and fuse arrangement provide protection for the outgoing snatch plug cable.
The Termination Box is available with a range of protection options for the outgoing Snatch Plug: BS88 fuses, MCB, RCD, RCBO and Time Clock options.
The full range of TOFCO Fuse-Units and Isolators are available to be mounted within the Column or Signpost. As standard we offer two options, pre-wired via a stuffing gland, with two metres of 3 core flex, connected to the male end of the snatch connector - TOFCO F144 double pole, single fused cut-out unit with earth. TOFCO DPI - 32amp switched double pole, single fused isolator with earth.
The Chamber consists of 155mm high sections, in a variety of widths & depths, to accommodate your cabling requirements. Cable entry is gained via a number of knock-outs which will accept cable ducts. A ductile iron cover and frame badged “Street Lighting” comply to the 12.5 / 40 tonne vertical load HWA requirement for passive safe installations, without the presence of a crash barrier, connected to the male end of the snatch connector - Within the chamber the Cable Termination Box can be mounted on the unique TOFCO adjustable shelf system in either the vertical or horizontal planes.