[Case Study] Power Sector - High Reliability Relays in Digital Protection Relay Devices
Substrate-mounted relay (lead relay) RZDR-EOOTC, plug-in type relay RB-2PETC
In fields such as power equipment where safety and reliability are required, relay modules with long lifespan and built-in "Bestact" are optimal!
The digital protection relay device is actively used as a protection relay (trip relay for circuit breakers) to quickly and accurately detect faults in transmission and distribution lines, and to promptly isolate the fault section from the healthy system. ■ Features of the Bestact built-in relay 1) Fast operating time: The operating time is less than 3ms to quickly implement the isolation of the fault section. 2) Large contact closing capacity: To energize the circuit breaker’s closing coil, it has a contact closing capacity of over 10,000 times with a load of DC110V, 15A (L/R≧5ms) for 0.5 seconds. 3) Large contact opening capacity: To interrupt the circuit breaker’s holding coil, it has a contact opening capacity of over 400,000 times with a load of DC110V, 0.5A (L/R=40ms). 4) High contact reliability: It has high contact reliability for infrequent use. With computer control detecting accidents such as short circuits, the command contacts that trip the circuit breaker require “high contact reliability for infrequent use,” “high speed,” and “contact closing and opening capacity,” for which our Bestact relay, known for its excellent environmental resistance, is adopted.
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basic information
■Rated Operating Current AC220V 1A ※cosφ＝0.4 (AC50/60Hz) DC110V 0.5A, 220V 0.2A ※cosφ＝0.4 (AC50/60Hz) ■Minimum Operating Voltage and Current 24V 1mA* 5V 10mA* Failure Rate λ₆₀＝4.6×10⁻⁹ (per operation) or less *For digital applications of phototransistor lighting circuits ■PCB Mount Relay (RZDR-E▯▯TC) Operating Ambient Temperature: -25 to +60℃ Storage Ambient Temperature: -40 to +60℃ Operating Time: 5ms or less Release Time: 3ms or less ■Plug-in Relay (RB-2PETC▯▯) Operating Ambient Temperature: -20 to +60℃ Storage Ambient Temperature: -40 to +80℃ Operating Time: 5ms or less Release Time: 3 to 7ms or less (varies by specific model) For other detailed specifications such as closed circuit capacity and open circuit capacity, please refer to the catalog.
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Applications/Examples of results
Purpose: Digital protection relay devices in the power sector Adopted products: Board-mounted relay (reed relay) RZDR-EOOTC, plug-in relay RB-2PETC For more details, please contact us.
Detailed information
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This product is equipped with a Yaskawa Power Lead Switch, Bestact. Our products have been recognized for their value by customers in markets that demand high reliability and safety for many years. We have prepared materials to explain "Bestact," the core technology that makes our products long-lasting and highly reliable, so please take a look at the catalog "【Materials】What is a Lead Switch?"
Company information
For over 40 years, our relays and sensors have been trusted and used in various markets where reliability and safety are essential, such as in Shinkansen (bullet trains) and steel manufacturing. With advantages such as an electrical lifespan that is twice that of standard relays and a failure rate of 1/20 under low loads, we contribute to improving equipment reliability while also reducing running costs by decreasing the frequency of replacements. Leveraging the excellent environmental resistance of our products, they perform well even in harsh conditions, such as in vegetable factories where humidity is present.