Cable Jacks | Cable Drum Jacks
Cable Jacks – Lifting LV MV HV Power Cable Drums | 11kV 33kV MV HV EHV
Safe Lifting Cable Jacks for Heavy Drums &
Handling LV HV ehv Power Cables
➡ Complete range of Cable Jacks and towers with spindle bars for drum lifting up to 40 tonnes using screw or hydraulic jack types – the jacks provide control and stability for LV-HV cable drums during cable pulling up to 33kV and EHV. All cable jacks and spindles shall be checked to ensure that they are in good condition and of the appropriate size for the weight of the drum and cable to be installed.
Check that the jacks and spindle are adequate for the size and weight of the cable drum, the gross weight of the cable drum will be marked on one flange. At all times during the cable pulling operation, at least one member of the team shall be stationed at the drum to control the rotation and check on the stability of the drum and jacks.
Hydraulic Cable Jacks
An overview of the range of hydraulic cable jacks:
HJ3 Cable Jack | 3 Tonne Capacity SWL Per Pair, Min Drum Dia 800mm, Maximum Drum Dia 2500mm, Base Area 830x700mm, Weight Per Pair 106Kgs. The HJ3 Cable Jack is complete with DS6 Spindle Bar and SC4/6 Locking Collars
HJ6 Cable Jack | 6 Tonne Capacity SWL Per Pair, Min Drum Dia 880mm, Maximum Drum Dia 3000mm, Base Area 900x765mm, Weight Per Pair 118Kgs. The HJ6 Cable Jack is complete with DS12 Spindle Bar and SC12 Locking Collars
HJ10 Cable Jack | 10 Tonne Capacity SWL Per Pair, Min Drum Dia 1080mm, Maximum Drum Dia 3500mm, Base Area 1060x985mm, Weight Per Pair 180Kgs. The HJ10 Cable Jack is complete with DS12 Spindle Bar and SC12 Locking Collars
Hydraulic Jacks | Lightweight hydraulic cable drum jacks which are almost indispensable for use in the cable yard. Versatile and easily adjustable within seconds to accommodate a vast range of LV MV HV EHV cable drums. Excellent all round stability, fitted with wheels to be easily moved by one person. Supplied complete with spindle bar and locking collars. Paint finish.
Screw Cable Jacks
An overview of the range of screw-type cable jacks:
SJ3 Jacks | 3 Tonne Capacity SWL Per Pair, Min Drum Dia 1060mm, Max Drum Dia 1600mm, Base Area 300x300mm, Weight Per Pair 37Kgs
SJ6 Jacks | 6 Tonne Capacity SWL Per Pair, Min Drum Dia 1360mm, Max Drum Dia 1900mm, Base Area 460x300mm, Weight Per Pair 45Kgs
SJ8 Jacks | 8 Tonne Capacity SWL Per Pair, Min Drum Dia 1660mm, Max Drum Dia 2200mm, Base Area 600x300mm, Weight Per Pair 76Kgs
Screw Jacks | A range of screw-type cable drum jacks, easy to handle and simple operation. Base plate designed to give stability even on soft ground. (Spindle/Collars not included). Paint Finish.
Cable Jack Towers
An overview of the range of cable jack towers:
JT20 Cable Jack Towers | 20 Tonne Capacity SWL Per Pair, Minimum Drum Dia 1480mm, Maximum Drum Dia 3400mm, Base Area 1830x285mm, Weight Per Pair 370Kgs.
JT20L Cable Jack Towers | 20 Tonne Capacity SWL Per Pair, Minimum Drum Dia 2360mm, Maximum Drum Dia 3400mm, Base Area 1830x760mm, Weight Per Pair 425Kgs Complete with Outrigger Leg for extra stability
JT30L Cable Jack Towers | 30 Tonne Capacity SWL Per Pair, Mimimum Drum Dia 3000mm, Maximum Drum Dia 4500mm, Base Area 2000x800mm, Weight Per Pair 660Kgs
JT40L Cable Jack Towers | 40 Tonne Capacity SWL Per Pair, Minimum Drum Dia 3000mm, Maximum Drum Dia 4500mm, Base Area 2000x1000mm, Weight Per Pair 1150kgs
Jack Towers Up To 40 Tonne Capacity | Designed for heavy drum lifts for Low & High Voltage power cables. Robust engineered construction with hydraulic jacks and adjustable height spindle support blocks. (Spindle/collars not included). Paint finish.
Safe Setting Up Of Cable Drums
& Lifting Prior To Cable Pulling
Some safety tips when handling cable drums:
- Carry out site specific risk assessment prior to commending cable pulling
- Push cable drums into the direction of travel noting “Roll this Way” arrows on flanges
- Remove battens or drum protection to ensure nails or tools do not damage the cable
- Never pull cable drums with back turned to the direction of travel
- Push squarely on the cable drum flanges and be aware for nails in wooden drums
- Never allow cable drums to move in an uncontrolled manner
- Never position or store a cable drum below an overhead power line
Cable drums should be positioned by the contractor so that the cable pull requirement from drum to the underground trench is straight as possible – cable rollers should be used to guide LV-HV cables into the trench.
When pulling cable into the duct the cable drum should be positioned above the cable duct so that the cable leaves the drum and enters the duct in a smooth curve. The drum shall be rotated by hand during the installation to ensure that the cable does not become tight between the drum and the duct mouth.
66kV/69kV Cable Pulling – high voltage cable pulling with lubrication from supported cable drums into HV substation ducts prior to straight joints and outdoor sealing ends being installed to single core 1000sqmm XLPE cables. Image: Allteck
Using Cable Jacks
Check that the cable jacks and spindle bars are adequate for the size and weight of the cable drum – the gross weight of the cable drum should be marked on the drum flange.
Excerpt from Safe Cable Drum Lifting | CA6A/5 Document WPD 2018
This technique forms the approved installation procedure for all underground cables, which are installed within Western Power Distribution with the exception of pressure assisted cables at 33kV, 66kV and 132kV cables.
Cable drum jacks should be mounted on a firm level base. If the ground is uneven, a foundation should be provided by using stout timber solidly packed. Timber packing may also be necessary to prevent settling of the jacks by spreading the weight if the ground is soft. It may be necessary to locate the drum in the roadway away from the trench and in this case the drum should then be offset by not more than 30 degrees to the line of the trench. For safety, the drum should not be mounted closer than 1m to trench excavations of normal depth.
The drum should be raised to just clear the ground and the drum spindle levelled to prevent the drum moving to one end. The level of the drum should be checked by a plumb bob against the drum side or by placing a spirit level on the drum spindle. When using a spirit level with heavy cable drums, readings should be taken at each end to compensate for deflection of the loaded spindle.
The spindle should be greased and a check made for smooth rotation of the drum.
Drum battens and steel bands if fitted may then be removed.
For safety, all nails should be withdrawn from the battens and drum rim immediately and the battens stacked neatly.
The cable winch to be used may be of the platform mounted, trailer mounted, or vehicle mounted type. The winch should be positioned at the end of the cable trench and securely anchored. It is important to note that where a boom is used, the main anchorage against the pull must be at the lower end of the boom. The anchorage should be obtained by cross bracings recessed into the sides of the trench.
Cable Pulling & Laying Products lv mv hv
Complete range of LV, MV and HV cable pulling products for installation into trench or duct including LV, 11kV/33kV medium voltage (MV), 66kV/132kV high voltage (HV) and EHV transmission and distribution cables up to 400kV.
Cable Rollers | Drum Jacks | Duct Rods | Cable Socks | Cable Lubricant | Duct Seals | Cable Duct | Cable Winches | Cable Trailers
What is a TRS Cable?
Pro-Audio devices sometimes call for TRS cables. What are these, and why do they frequently cause confusion? Let’s find out.
The letters TRS stand for Tip, Ring, and Sleeve, and refer to the parts of the jack plug that the different conductors are connected to. A TRS cable has three conductors vs the two on a standard guitar cable. A guitar cable is a TS, or Tip Sleeve cable.
TS jack plug
The jack plug at the top is a TS jack. The pointed metal bit at the end, is the tip, and the long metal shaft is the sleeve. The black band between them is an insulator preventing the two parts of the jack from shorting together. Notice we said ‘band’ and not ‘ring’. It’s easy to look at a TS jack and assume the black insulation ring is the ‘R’ in TRS but it’s not. The TRS jack is at the bottom. It has a metal ring in the middle which is the third conductor. The three conductors are separated by two black insulation bands.
TRS jack plug
There are other types, most commonly a TRRS which has two rings, and four conductors in total. TRRS jacks are often used for stereo headsets with microphones where four conductors are needed for ground, left channel, right channel, and mic.
A TS cable is fine for carrying a mono instrument signal such as from a guitar pickup to amp. The tip carries the signal and the sleeve is the return path and also usually the ground. Sometimes an additional conductor is needed such as for carrying a stereo signal, a balanced signal, or when connecting a voltage divider such as in an expression pedal. When a device requires a TRS cable, it’s because the application needs a third wire, and it will normally not work correctly if you try to use a TS cable in it’s place.
When we refer to a TRS cable, it normally means that there is a TRS jack at both ends. However, there is also another variant called a TRS Insert cable or TRS Y cable.
TRS Insert cable
The insert cable has a TRS jack plug on one end and two TS jack plugs on the other. They are called insert cables because they are often used in recording studios to connect outboard equipment to insert points on a mixer. They can also be used to connect stereo signals between equipment where device A uses separate jacks for left and right channels, and device B uses a combined TRS jack.
Like regular TS cables, TRS cables come with different jack plug sizes. The most common in pro-audio is the 1/4″ jack. The outside diameter at the sleeve is 1/4″. These are sometimes also called phone jacks, since they originated in the 19th Century for use in the first manual telephone switchboards. Wikipedia suggests that the 1/4″ jack may well be the oldest type of electrical connector still in widespread use having begun its life in 1878.
The smaller jacks commonly used are 3.5mm for computers and 2.5mm for handheld devices. Since much of the world had switched to the metric system by the time these smaller jacks were created, we now have to deal with the mixed units of measurement of the 1/4″ phone jack from the 1800’s and the modern metric computer audio plug.
A 1/4″ jack is 6. 35mm
A 3.5mm jack is approx 1/8″
A 2.5mm jack is approx 3/32″
So, what about balanced cables, are TRS cables balanced or not? In short, no, the cables themselves are not balanced, they are simply cables with three conductors, it’s the interfaces that determine if a connection is balanced or unbalanced (single-ended). However, a TRS cable may be required to use a balanced connection. A balanced interface normally has three wires:
1. Reference (usually ground)
2. Signal (hot)
3. Inverse (cold)
A balanced connection can help reduce noise from electromagnetic interference by using a technique that sends two copies of a signal 180 degrees out of phase with each other. There’s a more complete explanation of how balanced interfaces work here
For a balancing to work, the equipment you are connecting, must have a balanced interface. If it does, then you’ll need to use a three-wire cable. Often balanced connections use an XLR cable but sometimes, 1/4″ TRS cables are used instead. We may see TRS cables referred to as balanced cables for this reason, but it’s a bit misleading because it’s not the cables that are balanced. Sure, you may need TRS cables to connect two balanced devices together, but just using a TRS cable to connect two single ended devices together will NOT turn it into a balanced connection.
In conclusion, a TRS cable is a cable with round phone type connectors and three conductors called tip, ring and sleeve. The jack plugs maybe different sizes, so check you have the correct size for your gear. The cables can be used for different applications such as a stereo connection (right/left/ground), a balanced connection (hot/cold/ground), or a voltage divider connection (input/output/ground). However, the cable itself is the same.
If you need a TRS cable for your rig, check out Mission cables here.
Cable socket OKS (Tato) 70-95 mm2 ESAB – buy at the best price in Kiev from the company “TOV “TRADING DIM “NISA””
Cable socket OKS (Tato) 70-95 mm2 ESAB 9 0003
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Cable socket OKS (Tato) 70-95 mm2 ESAB
neoprene rubber. A pin-type rose, which secures the stone, securely and securely locks, bayonet locks securely and securely secure and effective contact. The cable is fastened behind an auxiliary socket and two screws with an internal hexagon. Roz’єmi cable OKC zastosovuetsya in the majority of the zvaryuvalny ESAB.
OKS socket 70-95 mm2 (Tato) ESAB – the most insulated cable socket, which is used for the installation of cables for connection to a steady stream. Working voltage up to 75 volts.
Cable connector 35-50, plug (WeCut) prices, reviews
The bayonet connection (aka bayonet or bayonet connection) works according to the following principle:
plug and socket are aligned, then rotated by 90°. This connection method allows you to get a reliable contact of the “plug-socket” pair without the use of a special tool. This is how the current connection of the welding source and the periphery (torch, ground terminal, etc.