Jan 07, 2021
Why is the market for built-in bypass soft starters active today
In fact, various manufacturers have also introduced their own soft starters with built-in bypass. Because the internal components of the built-in bypass are different, the volume and price of each company are also different. The built-in bypass soft starter is not a simple case enlargement, and then a bypass contactor is placed inside. It is to reset the whole, because a series of issues such as heat dissipation, wiring, and volume need to be considered. The built-in bypass soft starter adopts a three-in-three-out wiring method. Only a circuit breaker, a soft starter and related secondary equipment are needed in the cabinet, which greatly saves labor and auxiliary materials. Because the built-in bypass soft starter saves a contactor, it saves a lot of space, and the volume of the natural cabinet can be reduced accordingly, or it can be solved well in some special cases. The built-in bypass soft starter integrates a variety of motor protection functions, such as overcurrent, overload, phase loss, thyristor short circuit, overheat protection, internal contactor failure, phase current imbalance, etc., to ensure that the motor and soft starter are in fault or misoperation Time is not damaged.
The built-in bypass soft starter, also known as the built-in bypass contactor soft starter, refers to the soft starter in which the contactor originally used for bypass switching is built into the soft starter. Some people might think that it simply uses a larger shell to install the AC contactor. This is a misunderstanding. In fact, it uses a special, smaller, and more efficient contactor, which has many advantages during use.
Advantage 1: Wiring is simple and clear
The built-in bypass soft starter adopts a three-in and three-out wiring mode, and only a circuit breaker, soft starter and related secondary equipment need to be set in the starter cabinet, compared to an external bypass soft starter In terms of wiring contactors, the wiring is more concise and clear.
Advantage 2: Save budget and space
There is no need to install additional AC contactors, so in a cabinet of the same size, originally only one external bypass soft starter could be installed, but now two built-in bypass soft starters can be installed. Or use a smaller cabinet, which can save budget and space.
Advantage three: multiple protection functions
The soft starter integrates a variety of motor protection functions, such as overcurrent, overload, phase loss, thyristor short circuit, overheat protection, internal contactor failure, phase current imbalance, etc., to ensure that the motor and soft starter are not affected by failure or misoperation. damage.
Of course, the cost of the built-in bypass soft starter is slightly higher than that of the ordinary soft starter due to the increase of built-in components, but the price is still more affordable compared with the price of the original soft starter plus contactor.