01 Motor & operating duty
Motor voltage/current, starting method, operating cycle and expected start-stop frequency.
APPLICATION SELECTION
Components for Medium-Voltage Motor Control
For a new motor-control panel or an existing contactor replacement, begin with the starting duty and control arrangement. Select the contactor assembly and its associated parts as separate purchase items.
1. Choose what you need to source
Open a product or category to review its drawings and listed specifications. These are selection starting points, not a complete system configuration.
Vacuum contactors & fuse combinations
For motor starting and switching duties: compare the listed contactor arrangements and identify whether a fuse combination is required.
View products & drawings
Fuse insulation replacement parts
For an existing combination: match the housing, plug and contact interfaces to the installed fuse arrangement.
View products & drawings
Associated operating accessories
For a panel accessory requirement: provide its function, installation position and connection to the contactor or carriage.
View products & drawings2. Check these details before selecting a model
Contactors, protection devices and isolation components perform different duties. Do not use a combination rating as the rating of a standalone contactor.
02 Control arrangement
Control supply, holding arrangement, auxiliary signals and required interlocks.
03 Replacement interfaces
Existing model, mounting and carriage dimensions, primary contacts and secondary connections.
3. Tell us about your project
Start with the information you have; you do not need to complete every technical detail to inquire. Send drawing files to the email address below.
sales@tungarc.com
Selection questions
Can motors of the same power use the same contactor configuration?
Also check voltage, starting and running conditions, switching frequency and controls. Power alone is not sufficient.
Does contactor mechanical endurance establish motor-switching endurance?
Mechanical operations and loaded switching have different conditions. Electrical endurance evidence must match the intended load duty.
Further selection guidance
For projects that need a more detailed specification.