
Allicdata Part #: | KRDB217S-ND |
Manufacturer Part#: |
KRDB217S |
Price: | $ 50.74 |
Product Category: | Industrial Controls |
Manufacturer: | Littelfuse Inc. |
Short Description: | RELAY TIME DELAY D.O.B. |
More Detail: | Time Delay Relay Delay |
DataSheet: | ![]() |
Quantity: | 1000 |
Lead Free Status / RoHS Status: | Lead free by exemption / RoHS Compliant |
1 +: | $ 46.12230 |
Series: | * |
Part Status: | Active |
Lead Free Status / RoHS Status: | -- |
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Time Delay Relays are a type of relay that involve a time delay before the associated contacts close or open after energization of the coil. The purpose of Time Delay Relays is to protect against overload and to ensure a definite time lag elapses when a machine starts up. KRDB217S is such a product from Fotek with wide application field and reliable working principle.
Application Field
KRDB217S is suitable for a wide range of applications in industry, home appliance and mining automation, making the installation and replacement a breeze. It is especially useful for stabilizing power supply to ensure prolonged stable operation or particular functions executions. For example, KRDB217S are commonly used for motor start-up and shut-down sequences.
KRDB217S can also be used for lifting and transportation equipment, pumps and compressors, and switches with an electromagnet. It is also compatible with a variety of backup power sources, so it\'s suitable for emergency standby. Additionally, KRDB217S are handy for controlling energy-consuming products including computers, motors, and lighting systems.
Working Principle
KRDB217S has a thermally isolating casing which allows it to be used on equipment whose connectors generate heat. Its inner structure is made of alloy material which has a very good thermal efficiency, ensuring its excellent performance. Inside there is a timing capacitor, providing a certain amount of current when the voltage is stable.
When it is energized, a small current flows through the timing capacitor inside the KRDB217S and the result is the relay closing and the voltage is interrupted. After the predetermined time delay, the current stops and the timer is reset. At the same time, the timing capacitor\'s polarity is reversed, allowing the device to open again and the cycle repeats. By controlling the voltage, this cycle can be repeated to achieve the desired result.
Unlike traditional relays, Time Delay Relays like KRDB217S operate on both AC and DC power. Its design features ensures a secure and reliable operations against ECM interference. It also has a manual reset port and Normal Close or Normal Open options. Furthermore, the KRDB217S has a built-in power cut-off protection, allowing it to operate safely and reliably even in demanding industrial environments. Its high-precision settings makes it ideal for use in precision machineries.
In conclusion, the KRDB217S Time Delay Relay is a versatile and reliable device with a wide range of applications in industrial, home appliance and mining automation. Its design features and advanced protections guarantees safe and reliable operations even in the most extreme environments.
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