# F&F CKF-TRMS Phase Sequence and Loss Monitoring Relay

**URL:** https://aio.lv/en/product--ff-ckf-trms--12459035
**Data updated:** 2026-05-18 09:28 (EEST)
**Category:** Sensors & Detectors
**Manufacturer:** FF
**Manufacturer code:** CKF-TRMS
**EAN:** 5902431673554
**Warranty:** 2 Years
**Availability:** Available for order
**Price:** 27.99 €
**Prices and availability valid until:** 2026-07-13 23:59
**Price without VAT (21%):** 23.13 EUR
**Can be purchased by legal entities:** Yes (invoice)
**Buy:** https://aio.lv/en/product--ff-ckf-trms--12459035

## 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-TRMS is a professional phase sequence and loss monitoring relay designed to protect three-phase electrical equipment. It continuously monitors the correct phase sequence and detects phase loss or asymmetry. Featuring True RMS measurement, it ensures high accuracy in industrial and residential power systems, preventing damage to motors and sensitive electronics caused by incorrect power supply conditions.

## Long description

The F&F CKF-TRMS is a professional phase sequence and loss monitoring relay engineered to safeguard three-phase electrical installations. By continuously monitoring the power supply, this device detects phase loss, incorrect phase sequence, and voltage asymmetry. Utilizing True RMS measurement technology, the relay provides precise monitoring of the actual voltage values, ensuring reliable protection for motors, compressors, and sensitive electronic equipment in both industrial and residential environments.
Advantages
The primary benefit of the CKF-TRMS is its ability to prevent costly equipment damage caused by unstable power conditions. Its True RMS measurement capability allows for accurate detection of voltage fluctuations even in non-sinusoidal waveforms, which is critical for modern electrical systems. The device features a compact design for easy installation on standard DIN rails and provides clear status indication, allowing for rapid diagnostics and maintenance of the electrical network.
Suitable for
Three-phase motor protection
Industrial automation systems
HVAC and refrigeration equipment
Residential power distribution boards
Sensitive electronic control panels
When it may not be suitable
This relay is specifically designed for three-phase systems and cannot be used in single-phase electrical installations. It is not intended for use in environments with extreme moisture or high levels of conductive dust unless housed in an appropriate protective enclosure.
Key specifications
Monitoring functions: Phase sequence, phase loss, voltage asymmetry
Measurement method: True RMS
Mounting type: DIN rail
System type: Three-phase
Operating voltage: Standard industrial three-phase levels
How to use
The relay should be installed by a qualified electrician in accordance with local safety regulations. It is mounted on a 35 mm DIN rail within the distribution cabinet. Connect the three phases to the designated input terminals. Once powered, the device automatically begins monitoring the supply. If the phase sequence is correct and all phases are present within the defined parameters, the internal relay contacts will close, allowing the connected equipment to operate. If a fault is detected, the relay will disconnect the output to protect the downstream load.
What to consider before purchase
Verify that your electrical system is a three-phase configuration
Ensure the DIN rail space is available in your distribution board
Check that the voltage levels of your installation match the relay specifications
Usage recommendations
Regularly inspect the status indicators on the front panel to ensure the system is operating within normal parameters. If the relay trips, investigate the power supply source for phase loss or asymmetry before resetting the device.

## FAQ

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

The price is 27.99 € (valid at the time of publication and already includes all taxes). The item is available for order — 2 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/12459035/68761136_large.webp