HOMA for Motor starter
The fields of applications in the motor starter industry are water processing, motors (MW range), pumping stations and large air conditioning systems. The use in these applications is to switch the application on or off. This can be necessary in case of errors, maintenance work, at the end of a shift or to recover energy. A further use could be to short the starter when the rated speed is achieved. The application of the Starter-Step-Switch works by increasing the resistance in the system by switching further resistances into the system. This is done until the rated speed is achieved.
Motor starter. Products
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.
Air-break contactors and combinations of switches to deal with normal to complicated switching activities for all types of electrical loads.
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.
Different types of commutators to select different sources or for an alternative supply of the electrical load circuit.
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.
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.
HOMA AC / DC Bar mounted Contactors
For Motor starter
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.
Rotor shorting switches
HOMA manufacturers Mains frequency and medium frequency air contactors Switches that are known for their reliability and safety of operations – if required also under extreme climatic conditions. HOMA switches guarantee highest safety for personnel and connected systems. The number of switching cycles is well beyond 1.000.000. Mains frequency and medium frequency air contactors for switching off load are electro-magnetically actuated no load switches. They are used for example, as capacitor contactors or as rotor short-circuit contactors.
HOMA Earthing Switches are known for their reliable electrical magnetic system. This technology offers the advantage that the control of the switch can be performed from the control center and does not require manual interaction when grounding a separate section of the system. Earthing Switches are used for the safety of personnel while working on utilities, therefore a high reliability and safety of operations is of highest priority. HOMA Switches are protected against corrosion. Comparable Earthing Switches usually allows 1.000 – 5.000 switching cycles. HOMA Switches distinguish themselves with >1.000.000 switching cycles and very little service requirements.
On Load Contactors
HOMA air-break contactors are used to brake and short circuit motors, generators and choke circuits. A special application is the use as starter coupling contactor for the subsynchronous speed cascade. HOMA can offer a compact system for switch off of systems for maintenance conforming with norms. HOMA Contactors are a mark for quickness, longevity, reliability and number of switching cycles (> 3.000.000).
HOMA manufactures motor driven Disconnectors (up to 3,6kV) in a compact design, which are distinguished by the high number of possible switching cycles (>1.000.000). Disconnectors show a visible separation between voltage-carrying and activated system sections. The visible separation provides the safety during maintenance work that the specific system section is no longer carrying any voltage. Disconnectors are used to disconnect the network according to standards i.e. to perform a busbar change without disruption or to disconnect utilities. HOMA Disconnectors are type tested for rated lightning impulse withstand voltage up to 40kV and across the separation of up to 46kV.
High Current Cables
95mm² to 8.000mm². Air- and watercooled.
HOMA offers engineering and fabrication of copper tube systems.