# FF CKF-BR phase loss and phase asymmetry relay 10A 1P 4s 40–80V

**URL:** https://aio.lv/en/product--ff-ckf-br--12111515
**Data updated:** 2026-03-20 10:03 (EET)
**Category:** Sensors & Detectors
**Manufacturer:** FF
**Manufacturer code:** CKF-BR
**EAN:** 5908312593188
**Warranty:** 2 Years
**Availability:** Available for order
**Price:** 29.99 €
**Prices and availability valid until:** 2026-07-10 23:59
**Price without VAT (21%):** 24.79 EUR
**Can be purchased by legal entities:** Yes (invoice)
**Buy:** https://aio.lv/en/product--ff-ckf-br--12111515

## Delivery options

| Delivery method | Delivery time | Cost |
|---|---|---|
| Office pickup (2b. Kengaraga str., Riga, Latvia, LV-1063) | 30.06.2026 | free |
| Pickup points | 03.07.2026 | 1.99 EUR |
| Courier delivery to door | 03.07.2026 | 4.99 EUR |

## Summary description

Electromechanical protection relay FF CKF-BR, designed to monitor phase loss and phase asymmetry in single-pole circuits. Rated for 10 A switching capacity, 1-pole configuration, operating voltage range 40–80 V and a response time of 4 seconds. Used for protecting motors and three-phase equipment from imbalance, phase failure and related faults in industrial and commercial installations.

## Long description

The FF CKF-BR phase loss and phase asymmetry relay is an electromechanical protection device designed to detect phase failure and phase imbalance in single-pole control circuits. Rated for a switching capacity of 10 A and operating within a voltage range of 40–80 V, the relay provides a fixed response delay of 4 seconds to avoid nuisance trips from short transients. It is intended for use in motor protection and in safeguarding three-phase systems where detection of missing phases or significant asymmetry is required.
Advantages
The device combines simple electromechanical reliability with straightforward installation into existing control circuits. Its single-pole design and compact footprint make it suitable for retrofitting into motor starters and control panels. The fixed 4-second response time reduces false triggers caused by brief voltage dips, while the 10 A switching capacity covers a wide range of control loads. The 40–80 V operating range ensures compatibility with common low-voltage control supplies.
Suitable for
Protection of motors from phase loss and imbalance in industrial installations
Monitoring three-phase equipment via a single-pole control circuit
Integration into motor starters, contactor control circuits, and control panels
Commercial and light-industrial systems using 40–80 V control supplies
Key specifications
Function: phase loss and phase asymmetry detection
Switching capacity: 10 A
Poles: single-pole (1P)
Operating voltage range: 40–80 V
Response time: 4 seconds
Actuation: electromechanical relay mechanism
How to use
Install the relay in the control circuit following the manufacturer’s wiring diagram and ensure correct connection to the monitored phase supply within the 40–80 V range. Mount the unit in a dry, vibration-free section of the control cabinet and secure appropriate terminal tightening to maintain reliable contacts. When powered, the relay monitors for phase loss and asymmetry; after a detected fault persisting beyond the 4-second response time, the relay will change state to interrupt the controlled circuit. Restore the supply and clear any faults before returning the equipment to normal operation.
Usage recommendations
Use the relay with appropriately rated contactors or circuit protection devices and verify compatibility with the control supply voltage. Periodically inspect terminals and mechanical condition as part of routine maintenance and replace the relay if contact wear or unreliable operation is observed.

## FAQ

### How much does the FF CKF-BR phase loss and asymmetry relay 10A 1P cost, and is it available for purchase?

The price is 29.99 € (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 30.06.2026 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/12111515/67647203_large.webp