Advantages and disadvantages of online soft starter
The so-called online soft starter means that it does not require a bypass contactor and provides online protection from start-up, operation to end. However, this type of equipment can only start one motor at the same time, one machine for one use. The advantages are as follows: Because no additional bypass contactor is required, the space requirements are reduced and the applicable places are expanded. In addition, the economic cost of the entire cabinet is also reduced.
Of course, its shortcomings are also obvious. The entire operation process is completed inside the soft starter, the heat generation is significant, and its service life will be affected to varying degrees.
Advantages and Disadvantages of Bypass Soft Starter
This type of equipment requires an additional bypass contactor, some of which are installed inside the soft starter, also called a external bypass soft starter. Different from the online type, this bypass type equipment can start multiple motors at the same time, making one machine multi-purpose. Its advantages are as follows:
1. Fast heat dissipation and increased service life
After the startup is completed, switch to bypass. Only the detection circuit is inside the soft start, so that no large amount of heat will be generated inside, the heat will be dissipated quickly, and the service life will be increased.
2. After the startup is completed, various protections are still working, avoiding various problems after switching to bypass. In addition, the bypass contactor installed outside the soft starter is more convenient for inspection and maintenance.
3.The disadvantage is that the size of high-current contactors will also be relatively large, and the volume of the entire distribution cabinet will also increase relatively, and its cost and economic aspects are a large sum of money.
What are the advantages of the built-in bypass contactor soft starter?
1. Simple wiring
The built-in bypass soft starter adopts a three-in and three-out wiring method. Only the circuit breaker, soft starter and related secondary equipment need to be installed in the starter cabinet. The wiring is simple and clear.
2. Small space occupied
Since the built-in bypass soft starter does not require an additional AC contactor, a cabinet of the same size that originally only had one soft starter can now house two, or a smaller cabinet can be used. Users save budget and save space.
3. Multiple protection functions
The soft starter integrates a variety of motor protection functions, such as overcurrent, overload, input and output phase loss, thyristor short circuit, overheating protection, leakage detection, electronic thermal overload, internal contactor failure, phase current imbalance, etc., to ensure that the motor and soft starter Not damaged by malfunction or misoperation
Post time: Oct-25-2023