# FF CKF Phase Sequence and Asymmetry Monitoring Relay 10A 1Z 4s 45V

**URL:** https://aio.lv/en/product--ff-ckf--11257482
**Data updated:** 2026-05-18 02:45 (EEST)
**Category:** Sensors & Detectors
**Manufacturer:** FF
**Manufacturer code:** CKF
**EAN:** 5908312593027
**Warranty:** 2 Years
**Availability:** Available for order
**Price:** 23.49 €
**Prices and availability valid until:** 2026-07-05 23:59
**Price without VAT (21%):** 19.41 EUR
**Can be purchased by legal entities:** Yes (invoice)
**Buy:** https://aio.lv/en/product--ff-ckf--11257482

## Delivery options

| Delivery method | Delivery time | Cost |
|---|---|---|
| Office pickup (2b. Kengaraga str., Riga, Latvia, LV-1063) | 26.06.2026 | free |
| Pickup points | 01.07.2026 | 1.99 EUR |
| Courier delivery to door | 01.07.2026 | 4.99 EUR |

## Summary description

The FF CKF is a phase sequence and asymmetry monitoring relay designed to protect three-phase electrical equipment. It features a 10A contact rating, 1Z contact configuration, and a 4-second response delay with a 45V threshold. This device ensures reliable operation by disconnecting the load in case of phase loss or incorrect sequence, preventing damage to motors and sensitive industrial machinery.

## Long description

The FF CKF phase sequence and asymmetry monitoring relay is a specialized protective device engineered to safeguard three-phase electrical installations. By continuously monitoring the supply voltage, this relay detects irregularities such as phase loss or incorrect phase sequence, which are common causes of failure in industrial equipment. With a 10A contact rating and a 4-second response delay, it provides a reliable buffer against transient voltage fluctuations while ensuring rapid disconnection when critical faults occur.
Advantages
This monitoring relay offers robust protection for sensitive three-phase motors and machinery by preventing operation under harmful electrical conditions. Its design focuses on simplicity and reliability, ensuring that the load is disconnected immediately upon detecting a phase asymmetry exceeding the 45V threshold or a complete loss of a phase. The integration of a 1Z contact configuration allows for seamless incorporation into existing control circuits, providing a dependable safety mechanism that helps extend the service life of connected electrical components.
Suitable for
Three-phase electric motors
Industrial automation systems
HVAC control panels
Pumping stations
Compressor units
When it may not be suitable
This device is not intended for use in single-phase electrical systems or applications where the voltage threshold requirements differ from the specified 45V asymmetry limit. It is also not suitable for environments where rapid, sub-second response times are required, as the fixed 4-second delay is designed to ignore momentary voltage dips.
Key specifications
Rated current: 10A
Contact configuration: 1Z (normally open)
Response delay: 4 seconds
Asymmetry threshold: 45V
Monitoring type: Phase sequence and phase loss
How to use
The relay should be installed in a standard electrical distribution board by a qualified professional. Connect the three-phase supply lines to the designated input terminals of the device. The output contact should be wired into the control circuit of the motor starter or contactor coil. Once powered, the device will automatically monitor the incoming phases. If the sequence is correct and asymmetry is within limits, the internal relay will engage, allowing the connected equipment to operate.
What to consider before purchase
Verify that your supply voltage matches the device requirements.
Ensure the 4-second delay is appropriate for your specific machinery.
Check that the 10A contact rating is sufficient for your control circuit load.
Confirm that the 45V asymmetry threshold meets your equipment protection standards.
Usage recommendations
Always ensure that the power supply is disconnected before attempting any installation or maintenance work. Regularly inspect the relay for signs of thermal damage and verify that all terminal connections remain tight to prevent overheating.

## FAQ

### How much does the FF CKF Phase Monitoring Relay 10A cost, and is it available for purchase?

The price is 23.49 € (valid at the time of publication and already includes all taxes). The item is available for order — 6 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 26.06.2026 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 FF 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 FF 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

https://aio.lv/img/cache/product/11257482/62172602_large.webp