An ACSR Compression Machine is a hydraulic crimping/press machine used in overhead power transmission lines to join or terminate ACSR conductors.
What ACSR Means
ACSR = Aluminum Conductor Steel Reinforced
• Aluminum strands carry current
• Steel core provides mechanical strength
It is widely used for overhead transmission lines because it is strong and lightweight.
What an ACSR Compression Machine Does
The machine compresses (crimps) metal sleeves, joints, or dead-end clamps onto ACSR conductors using high hydraulic pressure.
Typical uses:
• Mid-span conductor jointing
• Dead-end clamp installation
• Repair sleeves
• Jumper connections
The compression ensures the joint has high mechanical strength and good electrical conductivity, similar to the original conductor.
Main Components
An ACSR compression setup usually includes:
• Hydraulic compression head
• Hydraulic pump (manual / electric / petrol)
• Dies set (different sizes for different conductors)
• Hydraulic hose
• Pressure gauge
Typical Specifications
Parameter Typical Value
Compression force 100–300 tons
Hydraulic pressure ~700–750 bar
Conductor size 10–400mm²or more)
Die type Hexagonal / circular
Power source Manual or motorized hydraulic pump
Machines with 100–150 ton output are common for transmission line work.
An ACSR compression machine is a hydraulic press used by linemen to crimp sleeves and fittings onto ACSR conductors to make strong electrical joints in transmission lines.
Where It Is Used
• Power transmission line construction
• Substation jumper connections
• Transmission line maintenance
• Conductor repair work
Lines such as 33 kV – 800 kV transmission systems commonly use these machines.
