Conducting Arm

Description

Conducting Arm

The conducting arm is an essential part of the electrode lifting mechanism of a modern electric arc furnace and ladle furnace. The conducting arm is made of a copper steel composite plate or aluminum steel composite plate. The cross-section shape is rectangular, and the interior is cooled by water. Many insulation links between the water-cooled conductive copper pipe, electrode collet, and the cross arm are eliminated, which greatly simplifies the structure of the cross arm. It is a new type of cross arm on the ultra-high power electric arc furnace.

Composition of Conducting Arm:

Conducting arm body, Contact jaw, Contact jaw relaxation mechanism

Material of Conducting Arm

The conducting arm is made of copper steel composite plate: the outer layer is copper plate and the inner layer is steel plate, which is welded together by the explosion. The outer part of the conducting arm is usually made into a rectangle, the outer copper plate is used for conducting electricity, and the inner steel plate is used as the support arm. Use the copper plate instead of the conductive copper pipe.

It can greatly increase the conductive area, greatly reduce the reactance and resistance value, and increase the active power by 3% – 6%.

Characteristics

The clamping force of the contact jaw mechanism is great and the clamping head is designed well. During operation, not only the electrode will not fall off, but also the electric contact between the electrode and the copper clamping head is good.

The small center circle of the electrode not only reduces the inductive pressure drop on the electrode but also greatly reduces the corrosion coefficient of refractories, which is especially beneficial to the operation of the LF furnace.

All stressed parts are water-cooled or placed in water-cooled components and will not be heated by electric and electromagnetic induction of the furnace, not to worry about material creep at high temperatures or fastener stress relaxation and failure.

Reliable insulation is provided in the right place without current dispersion or gap arc and parts will not be heated and damaged.

The advantage Copper-steel Conducting Arm is as follows:

Structural rigidity is good, the vibration of the conducting arm is reduced, and the operation is safe and reliable.

Reduce resistance and reactance value to improve electrical efficiency.

Concise, compact, easy to install, use and maintain.

Main Technical Parameters

Modle	Transformer Capacity	Conducting Arm Parameters					Matching Electric Arc Furnace Capacity (T )	Matching LF Capacity (T )	Matching Water-Cooled Cable Section (mm2)* Root Number
		Electrode Diameter (mm)	Allowable Minimum Diameter of Electrode Center Circle (mm)	Electrode Clamping Mechanism		Consumption of Cooling Water (m3/h)
	KVA			Clamping Force (Kgf)	Type
HF250-□	3150	250	–250	–6200	Butterfly Spring Pressure	–8	6–10	15-25	2000*1
HF300-□	5000	300	–600	–9000		10–12	10–12	35-40	2800*1
HF300-□	6300
HF350-□		350	–680	–12000			12–25		3200*1
HF350-□	8000				Butterfly Spring Hydraulic Pressure	12–18		55-60	2000*2
HF400-□	10000	400	–750	–16000			25–30		2800*2
HF400-□	12500							65-75	3200*2
HF400-□	16000							80-120	3600*2
HF450-□	20000	450	–850	–20000		–25	30–40	130-170	4000*2
HF550-□	40000-150000	550	–1100	–30000		–30	100–160	200-300	4000*4
Hanmetallurgy  Modle Code

Ordering Items

1. The orderer can choose to order according to the table. If there are different requirements, please put forward them in the contract.

2. Since the conductive cross arm is a part of electric arc furnace, ladle furnace, ferroalloy furnace, and refining furnace when ordering the conductive cross arm, the user shall also provide other relevant dimensions, such as:

① The distance between the center of the cross arm column and the centerline of the furnace;

② Connection form and relevant dimensions of electrode arm and electrode column;

③ Hydraulic medium pressure or compressed air pressure, etc.

Please Provide the Following Items When Ordering

1. ▲ model
2. ▲ electrode diameter (mm);
3. ▲ electrode rated current (a);
4. ▲ diameter of electrode center circle (mm);
5. ▲ electrode clamping mechanism: Hydraulic type: type of hydraulic medium; Pressure (MPA);
6.                                                                 Pneumatic type: compressed air pressure (MPA)
7. ▲ the size of each phase matched with the conductive cross arm and the outline and size requirements of the three-phase cross arm;
8. ▲ model of water cooling cable;
9. ▲ cooling water inlet temperature (℃)
10. ▲ cooling water inlet pressure (MPA);
11. ▲ other additional requirements