# Siemens 7PV1578-1BW30 Star-Delta Time Relay, 12-240V AC/DC, 0.05s-100h

**URL:** https://aio.lv/en/product--siemens-7pv1578-1bw30--12463408
**Data updated:** 2026-05-18 09:41 (EEST)
**Category:** Control Systems
**Manufacturer:** Siemens
**Manufacturer code:** 7PV1578-1BW30
**EAN:** 5900003003341
**Warranty:** 2 Years
**Availability:** Available for order
**Price:** 51.49 €
**Prices and availability valid until:** 2026-07-29 23:59
**Price without VAT (21%):** 42.55 EUR
**Can be purchased by legal entities:** Yes (invoice)
**Buy:** https://aio.lv/en/product--siemens-7pv1578-1bw30--12463408

## Delivery options

| Delivery method | Delivery time | Cost |
|---|---|---|
| Office pickup (2b. Kengaraga str., Riga, Latvia, LV-1063) | 17.07.2026 | free |
| Pickup points | 22.07.2026 | 1.89 EUR |
| Courier delivery to door | 22.07.2026 | 4.99 EUR |

## Summary description

The Siemens 7PV1578-1BW30 is a professional star-delta time relay designed for reliable motor starting control. It features a wide voltage range of 12-240V AC/DC and an adjustable timing range from 0.05 seconds to 100 hours. This industrial-grade relay ensures precise switching operations in automation systems, providing durability and consistent performance for demanding electrical applications.

## Long description

The Siemens 7PV1578-1BW30 is a professional electronic star-delta time relay engineered for the precise control of motor startup sequences. This industrial-grade device is designed to manage the transition from star to delta connections, ensuring smooth and efficient motor operation in various automation systems. With its compact design and versatile functionality, it is an essential component for control cabinets and distribution boards where space is at a premium.
Advantages
This time relay offers exceptional flexibility due to its wide operating voltage range of 12-240V AC/DC, allowing it to be integrated into diverse electrical environments worldwide. The device features seven selectable time ranges, providing a broad adjustment span from 0.05 seconds up to 100 hours. Its robust construction ensures consistent performance and high reliability in demanding industrial applications, while the screw terminal connection technology facilitates secure and straightforward installation.
Suitable for
Motor startup control in star-delta configurations
Industrial automation and control systems
Control cabinet and distribution board installations
Applications requiring precise time-delayed switching
When it may not be suitable
This relay is specifically designed for star-delta motor starting applications and may not be suitable for general-purpose timing tasks that require different output configurations or specialized logic functions. It is not intended for high-current direct switching of large motors without appropriate contactors.
Key specifications
Function: Star-delta (wye-delta) timing
Voltage range: 12-240V AC/DC
Time range: 0.05 seconds to 100 hours
Output: 2 NO contacts
Connection type: Screw terminals
How to use
The relay is designed for mounting within a control cabinet or distribution board. Begin by ensuring the power supply is disconnected. Connect the control wiring to the screw terminals according to the specific star-delta circuit diagram required for your motor. Select the appropriate time range using the integrated adjustment controls on the front of the unit. Once installed and configured, the relay will automatically manage the timing transition between the star and delta phases upon receiving the start signal.
What to consider before purchase
Verify that the star-delta function is compatible with your specific motor starting requirements.
Ensure the control voltage of your system falls within the 12-240V AC/DC range.
Confirm that the physical dimensions and mounting method are suitable for your existing control cabinet layout.
Usage recommendations: Always ensure that the relay is installed by a qualified professional in accordance with local electrical regulations. Periodically inspect the screw terminal connections to maintain optimal contact and prevent overheating in high-vibration environments.

## FAQ

### How much does the Siemens 7PV1578-1BW30 Star-Delta Time Relay cost, and is it available for purchase?

The price is 51.49 € (valid at the time of publication and already includes all taxes). The item is available for order — 10 pcs. are in stock, and you can place your purchase right now with delivery across Latvia and Europe or choose pickup at the Riga collection point. We offer favorable purchase terms, including the option to split the payment into convenient monthly installments. Availability and price are updated in real time, so we recommend placing your order in advance.

### If I order this product today, when will I receive my order?

If you place your order today, delivery will be as fast and convenient as possible. You will be able to pick up your order on 17.07.2026 at the Riga pickup point or choose delivery across Latvia and Europe. We carefully inspect every purchase and pack it securely for safe transportation.

### What payment options are available?

AiO.lv offers several payment methods: Bank transfer, Bank cards on-line, Apple Pay, Google Pay. All transactions are 100% secure and encrypted.

### Can this product be purchased for a company (with VAT)?

Yes. AiO.lv works with legal entities in Latvia and across Europe. The product price already includes VAT. For certain product categories, as well as for companies from other EU countries with a valid VAT number, a 0% VAT rate may apply. We issue the invoice immediately after the order is placed, support electronic BIS invoices, and automatically generate all necessary accounting documents. You can complete the purchase for a company online — simply select the company profile and choose bank transfer as the payment method during checkout.

### What is the warranty period?

All Siemens products come with an official 2 Years warranty. It covers all manufacturing defects and malfunctions that may occur during use. The warranty is valid at all authorized Siemens service centers and through AiO.lv

### Can the product be returned after purchase?

Yes, you can return the product within 14 days of purchase if you bought it as a consumer (not a legal entity). Returns are possible without giving any reason — the main condition is that the product retains its original appearance and full set of accessories. We will make the process as simple and convenient as possible: just contact our customer support team, and we will help you arrange the return.

### Where should I contact for warranty service?

For warranty-related questions you can contact the AiO.lv (SIA VSPRO) customer support team. More information about warranty service: https://aio.lv/en/warranty

## Image

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