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Every motor needs to be shielded from all potential flaws in order to assure continued, secure functioning as well as avoid time loss brought on by breakdown.
Electric motors are used in almost all industries to regulate production and processes. As a result, the motor needs to be fail-safe.
The winding insulation of a motor is the most sensitive component. Overly high temperatures pose a serious threat to winding insulations.
One such device that guards a motor against damage brought on by overloads and overcurrent is the overload relay. It can be found in motor control centers and motor starters and is utilized with contractors.
It detects when the motor is overloaded and cuts off the current to the motor, preventing overheating and winding damage. In addition to overloads, it may safeguard the motor against phase failures and imbalance.
They are quite frequently referred to as OLR. A motor is said to be overloaded when it continuously draws more current than it is rated for.
It is the most frequent fault and can cause the motor winding’s temperature to rise. Therefore, it is crucial that operations resume quickly.
A bimetallic strip’s electro-thermal characteristics are the basis of how a thermal overload relay operates. It is positioned in the motor circuit such that the motor receives current through both of its poles.
Directly or indirectly, the current causes the bimetallic strip to heat up, and when the current flow reaches the predetermined value, it bends.
The solid state overload relays device uses an internal capacitor and a circuit board algorithm to mimic the heating effect. The capacitor will charge as the load current rises until an overload trip the overload relay.
SSRs do not have electromagnets or any moving contacts in them. Instead, it consists of semiconductors and optocouplers within.
When a voltage is applied to the input section of the SSR, current flows through the optocoupler and triggers the TRIAC at the output section, and the TRIAC starts conducting.
The Global Solid state overload relays market accounted for $XX Billion in 2023 and is anticipated to reach $XX Billion by 2030, registering a CAGR of XX% from 2024 to 2030.
Siemens developed the solid state overload relays for IO-Link, which includes the 3RB24 evaluation module, the 3RB29 current measuring module, and a connecting cable.
It offers two distinct protection mechanisms, overload and thermistor protection, to safeguard electrical operating equipment (such as three-phase motors).
Additionally, using IO-Link, a ground-fault detection feature can be activated.
The new SIRIUS 3RB24 for IO-Link, for instance, provides the read-out of current values, diagnostics, and locally defined parameters in addition to the features of the SIRIUS 3RB22 solid-state overload relay that have already been stated.
The overload relay, which is a component of the SIRIUS modular system, can also be used in conjunction with contractors as a direct-on-line, reversing, or star-delta starter.
The SIRIUS 3RB24 offers an IO-Link connection to the superior control as well as the realization of compact load feeders for current ratings up to 820 A.
