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Media gallery
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Media gallery
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Media gallery
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Media gallery
Automatic star-delta switch / star-delta time relay
- Regular price
- €27,54
- Regular price
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- Sale price
- €27,54
- Unit price
- per
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Pre-order product
- Description
- Instructions
- Payment methods
- Warranty
Relay for Star-Delta Starting Modes (ERV-YU)
The ERV-YU start relay is designed for automatic control of electric motor starts in STAR-DELTA mode at an operating voltage of 24/220 V AC. The relay ensures a smooth motor start, reduces the starting current, and extends the lifespan of the entire drive system. It is equipped with indicator lights for the modes ON, STAR, and DELTA and allows adjustment of the starting time.
Description and Operating Principle
For a smooth start of the electric motor, the STAR mode is first activated, which reduces the initial current surge. When the required speed is reached, the winding is automatically switched to the DELTA operating mode, in which the motor runs normally.
The automatic switching of the operating mode by relays and contactors increases the stability of the entire system and eliminates the risks associated with manual operation.
When voltage is applied to the relay terminals A1-A2:
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The STAR contact is activated, the STAR indicator lights up, and the start interval t1 (0.1-30 s) begins counting.
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After the time t1 expires, the STAR contact is switched off, the indicator goes out, and a short pause t2 (15 ms) begins.
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Then the PHASE-DELTA contacts are switched on, the DELTA indicator lights up, and the relay remains in this mode for the entire time voltage is applied to terminals A1-A2.
Usage
The ERV-YU relay is suitable for:
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automatic control of motor circuits in star-delta mode
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industrial applications with high demands for stable and safe motor starting
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systems where it is necessary to reduce starting current and protect the electrical network
Additional Offerings
For the relay, you can purchase:
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Contactors and starters
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Contactors with mechanical interlock
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Autonomous mechanical interlock modules
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Metal enclosure with protection rating IP65
All of this is available directly from stock at competitive prices.
Online payment by card - after completing the order, you will be redirected to the payment page, and the payment confirmation will be sent to you by email.
Cash on delivery - payment is made according to the payment instructions to the driver of the transport company.
Bank transfer - you will receive a proforma invoice by email no later than the next business day, which includes the account number you should use for the payment.
On account - this payment option is available to partners who have concluded a framework agreement with our company.
If you wish to use the last two payment methods, please call our manager who will provide you with instructions on how to receive an invoice with or without VAT.
The electrical devices we supply meet high quality standards, come with a 24-month warranty, and comply with all EU requirements.
Additionally, we offer free shipping for orders over €100. We have a flexible system of discounts and promotions. The technical knowledge and experience of our staff enable us to provide high-quality advice and, if necessary, suggest alternatives to electrical products.
The electrical equipment we supply meets high-quality standards, comes with a 24-month warranty, and complies with all EU requirements.
In case of a complaint, the return of the goods is free of charge.