An electromagnetic starter, also called a contactor, is a very popular and reliable device for controlling and monitoring an electrical load of any type. When working with engines and standard pumps, this device is almost indispensable.
Consider in detail about what characteristics should be paid attention to when buying an electromagnetic starter, and on which the price of a magnetic starter depends.
The manufacturer of the device
In many cases, PML, KTI and KMI brands will be enough. Almost all starters presented on the market are designed for current up to 25a. If you find it difficult to choose a manufacturer, you can just tell the seller what parameters in the device you count. Most electromagnetic starters are interchangeable.
Nominal current indicator in the starter
An indicator of the rated current in the device is the maximum current passing through the general contact group in the device. According to the classification, starters distinguish between values from 16A to 63A. Release devices with greater bandwidth, but they are used only in large projects. The throughput also affects the dimensions of the starter.
Exploration of the degree of protection
When installing the device in the shield, the IP00 protective shell will be absent. Small KMI class starters are best suited for this. If we have the goal of choosing a device for a production room, then IP54 will be the best option. IP40 will be enough for household premises.
Voltage in the coil of the device
Almost always, experts are limited to a 230V coil. Although sometimes a 400V coil device makes it possible to save core in the cable.
None -enureed and reversing starters
And although almost always in electromagnetic starters uses a non -reed mechanism, sometimes it makes sense to acquire a reverse option. For example, to control the valve. In fact, these are two non -renewal starters, only connected in a special way.
Control buttons and signal lamps
When installing a starter in the shield, you can do with a classic starter without additional buttons and a signal bulb. The starter control buttons can be put on the front wall of the shield. If the installation is carried out outside the shield, then the control elements are located on the starter case.
Thermal relay in the device
If we want to protect the engine, it is better to choose an electromagnetic starter equipped with a thermal relay.
Additional types of contacts
You can almost always get by with an electromagnetic starter with a single additional contact. When creating more complex control mechanisms, it will be necessary to install another prefix with the necessary number of closing contacts.