# F&F CKF-319 Phase Sequence and Loss Monitoring Relay with Adjustable Time Delay

**URL:** https://aio.lv/en/product--ff-ckf-319--12459028
**Data updated:** 2026-05-18 09:28 (EEST)
**Category:** Sensors & Detectors
**Manufacturer:** FF
**Manufacturer code:** CKF-319
**EAN:** 5902431672571
**Warranty:** 2 Years
**Availability:** Available for order
**Price:** 57.99 €
**Prices and availability valid until:** 2026-07-13 23:59
**Price without VAT (21%):** 47.93 EUR
**Can be purchased by legal entities:** Yes (invoice)
**Buy:** https://aio.lv/en/product--ff-ckf-319--12459028

## Delivery options

| Delivery method | Delivery time | Cost |
|---|---|---|
| Office pickup (2b. Kengaraga str., Riga, Latvia, LV-1063) | 06.07.2026 | free |
| Pickup points | 09.07.2026 | 1.99 EUR |
| Courier delivery to door | 09.07.2026 | 4.99 EUR |

## Summary description

The F&F CKF-319 is a professional phase sequence and loss monitoring relay designed to protect three-phase electrical equipment. It features adjustable time delay settings for both activation and return, ensuring reliable operation in industrial and residential power systems. This device prevents damage caused by phase failure or incorrect phase sequence, providing essential safety for motors and sensitive electrical installations.

## Long description

The F&F CKF-319 is a professional phase sequence and loss monitoring relay engineered to safeguard three-phase electrical equipment from potential damage. By continuously monitoring the supply voltage, this device detects phase failures and incorrect phase sequences, which are critical factors in preventing operational malfunctions in motors and sensitive industrial or residential installations. With its integrated adjustable time delay settings for both activation and return, the relay ensures stable performance even in environments with minor voltage fluctuations.
Advantages
This monitoring relay offers robust protection by preventing equipment from operating under hazardous electrical conditions. The adjustable time delay feature allows users to customize the response sensitivity, effectively filtering out transient voltage dips that might otherwise cause unnecessary system shutdowns. Its compact design facilitates easy installation in standard electrical cabinets, while the high-quality internal components ensure long-term reliability and precise monitoring of the three-phase network.
Suitable for
Three-phase electric motors
Industrial automation systems
HVAC equipment and heat pumps
Residential power distribution boards
Sensitive electrical machinery requiring phase protection
When it may not be suitable
This device is specifically designed for three-phase systems and will not function in single-phase electrical circuits. It is also not intended for use in environments where extreme moisture, dust, or corrosive gases are present without an appropriate protective enclosure.
Key specifications
Monitoring type: Phase sequence and phase loss
Supply voltage: Three-phase
Adjustable time delay: Activation and return
Mounting: DIN rail
Application: Industrial and residential electrical systems
How to use
The relay should be installed by a qualified electrician on a standard DIN rail within the distribution cabinet. Connect the three-phase supply lines to the designated input terminals according to the wiring diagram provided on the device housing. Once installed, use the adjustment knobs to set the desired time delay for activation and return based on the specific requirements of the connected equipment. After power is applied, the relay will monitor the phase status and automatically disconnect the load if an error is detected.
What to consider before purchase
Verify that your electrical system is a three-phase configuration
Check the voltage requirements of your equipment
Ensure there is sufficient space on the DIN rail for installation
Confirm that the adjustable time delay range meets your operational needs
Usage recommendations
Regularly inspect the relay connections to ensure they remain tight and free from oxidation. Periodically test the device functionality by simulating a phase loss condition to confirm that the protection mechanism triggers correctly and disconnects the load as intended.

## FAQ

### How much does the F&F CKF-319 Phase Sequence and Loss Monitoring Relay cost, and is it available for purchase?

The price is 57.99 € (valid at the time of publication and already includes all taxes). The item is available for order — 8 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 06.07.2026 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 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/12459028/68761130_large.webp