Steel Plants

Homa High current

HOMA for Steel plants

With more than 60 years of experience in the field of steel plants HOMA contactors set the standard in this field. Main uses are switching power on load as well as off load. On load switching can be used for switching furnaces on and off. Off load switching allows one transformer to be used for two furnaces. Power is constantly switched between the furnaces in a high frequency range.

Steel plants. Products

HOMA Switchgear

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For over 60 Years

HOMA switches are being built into different applications for more than 60 years and have been supplied to more than 100 countries. Due to the worldwide experience of HOMA, many national and international norms can be fullfield and have conducted a vast number of type tests for our products. We equip our switches with coils that can be operated worldwide with 60V to 480V AC/DC. The worldwide distribution network ensures minimal downtimes in case of a break down. HOMA is known for short delivery times and due to its modular design, switches can be assembled and delivered within 24 hours.

Switching

Air-break contactors and combinations of switches to deal with normal to complicated switching activities for all types of electrical loads.

Isolating

Sliding contacts, air-break contactors and air- or water-cooled high current switches for galvanic interruption of circuits without a control current for technical or safety reasons.

Distributing

Different types of commutators to select different sources or for an alternative supply of the electrical load circuit.

Controlling

Commutators and pole-reversal contactor including associated control systems, reversing contactors etc. for process-related reversion of the electrical current or rotational direction; braking contactors for switchoff for drives that simultaneously trigger dynamic braking systems.

Regulating

Starting contactor / rotor-short circuit contactor, as well as starting coupling contactor / cascade coupling contactor for large machinery in association with subsynchronous static converter systems cascade; capacitor contactors for balancing or compensating inductive electrical loads. Starting, damping and discharge resistors.

HOMA Bar mounted Contactors

In HOMA Bar mounted Contactors current-carrying components are organized on the basis of a main frame construction. All required modules are arranged on top of a single frame (bar), for example: Magnet system, Terminal plate for power circuit, Switch locking system and Movable contacts. The two examples below (G500 / HAT-2W) illustrate the construction.

Type G500

1
Magnet system
2
Coil
3
Auxiliary contacts (3NO + 3NC)Auxiliary contacts
4
U-profile for auxiliary contactsU-profile
5
Solid-state control unitControl unit
6
Terminal plate for power circuitTerminal plate
7
Grounding
8
Main frame
9
NC-Current pole
10
NO Main poles with arc chamberNO Main poles
G500

Type HAT-2W

1
Switch locking systemSwitch lock. system
2
Magnet system
3
Coil
4
Auxiliary contacts (3NO+3NC)Auxiliary contacts
5
U-profile for auxiliary contactsU-Profile
6
Stationary contact watercooledStationary contact
7
Connection for power circuitConnection
8
Main frame
9
Movable contacts
10
Inter locking device
HAT-2W

HOMA AC/DC Bar mounted Contractors

for Steel plants

HOMA develops and manufactures AC and DC bar mounted contactors for railway applications, foundries and steel furnaces, solar and wind turbines, motor starters, battery test devices, ripple control systems, rolling mills and cranes since more than 60 years. HOMA is a system supplier for renowned manufacturers. Beside manufacturing contactors as a component, HOMA is capable to develop, manufacture and install turnkey solutions for complex requirements including supply of control cabinets and power electronics.

DC-Schaltgerät
AC-Schaltgerät

DC Switches

HOMA manufactures DC switches for a variety of DC applications. These can operate under voltages of up to 3.000V DC. The HOMA product range includes switches and switching combinations with positive and negative contacts. HOMA switches are being used for many years in applications that have to operate under high temperatures and continue to conduct and switch high voltages. By using silver contacts and therefore having low ohmic losses, HOMA switches improve the energy balance and reduce energy losses. DC switches can reach switching periods of under 16 milliseconds.

AC Switches

HOMA AC switches are often used in applications where high currents under difficult switching circumstances have to be switched. Difficult circumstances are given i.e. in cases of low pure cosinus phi. These applications can be found in motors, inductive loads and capacitive loads. HOMA switches are worldwide known for switching of high currents.

HOMA switches can switch currents of up to 50.000A.

HOMA DC/AC Switches: Product Range

Power contactors (on Load)

  • DC-contactors up to a maximum of 12.000A / 3.000V
  • Medium-frequency contactors up to a maximum of 12000A / 3.000V < 10 kHz
  • Medium-frequency contactors up to a maximum of 24000A / 3.000V
  • Capacitor contactors up to a maximum of 1.000A / 3.000V < 10kHz

High current switches (off Load)

  • Cut-off and changeover switches up to a maximum of 50.000A / 3.000V / 0-150kHz
  • Air- and water-cooled commutators and pole-reversal contactor up to a maximum of 25.000A
  • Command units to control recurring switching operations
  • Contact installations for galvanic-technology in the form of air- and water-cooled prism or sliding contacts up to a maximum of 20.000A

HOMA Cables

High Current Cables

High Current Cables


95mm² to 8.000mm². Air- and watercooled.

Products

Copper Tubes


HOMA offers engineering and fabrication of copper tube systems.

Products
Copper Tubes
Busbar Systems

Busbar Systems


Bus bars with a thickness of 5 mm to 15 mm and a width of 20 mm to 200 mm.

Products

Electrode arms


Components for LHF, EAF and DC furnaces.

Products
Electrode arms

As a system supplier in the field of high current technology our product portfolio includes a variety of power connections. Beside a high flexibility, our products are known for a long life time and reliability.

Current Carrying Connections

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