# FF CKF-BT-TRMS Phase Sequence and Phase Loss Monitoring Relay

**URL:** https://aio.lv/en/product--ff-ckf-bt-trms--12444436
**Data updated:** 2026-05-27 17:57 (EEST)
**Category:** Sensors & Detectors
**Manufacturer:** FF
**Manufacturer code:** CKF-BT-TRMS
**EAN:** 5902431673646
**Warranty:** 2 Years
**Availability:** Available for order
**Price:** 34.49 €
**Prices and availability valid until:** 2026-07-14 23:59
**Price without VAT (21%):** 28.50 EUR
**Can be purchased by legal entities:** Yes (invoice)
**Buy:** https://aio.lv/en/product--ff-ckf-bt-trms--12444436

## 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 FF CKF-BT-TRMS is a professional phase sequence and phase loss monitoring relay designed to protect three-phase electrical equipment. It features TRMS measurement technology for accurate voltage monitoring, ensuring reliable operation by detecting incorrect phase sequence or loss. Ideal for industrial and commercial electrical installations requiring precise phase protection and system stability.

## Long description

The FF CKF-BT-TRMS is a professional phase sequence and phase loss monitoring relay engineered to safeguard three-phase electrical equipment. By utilizing advanced TRMS measurement technology, this device provides precise voltage monitoring, ensuring that your electrical systems operate within safe parameters. It is designed to detect irregularities such as incorrect phase sequence or total phase loss, effectively preventing potential damage to motors, compressors, and other sensitive industrial machinery.
Advantages
The primary benefit of the CKF-BT-TRMS is its high-precision TRMS measurement, which allows for accurate monitoring even in environments with distorted voltage waveforms. This reliability ensures that the relay reacts only to genuine faults, minimizing unnecessary downtime. Its robust construction and compact design make it an essential component for maintaining system stability and extending the operational lifespan of connected three-phase equipment in demanding industrial and commercial settings.
Suitable for
Industrial motor protection
Commercial HVAC systems
Three-phase power distribution panels
Automation and control systems
Critical electrical infrastructure
When it may not be suitable
This device is specifically designed for three-phase systems and is not compatible with single-phase electrical installations. Furthermore, it should not be used in environments where environmental conditions exceed the specified operating temperature or humidity ranges, as this may compromise the internal electronics and measurement accuracy.
Key specifications
Measurement technology: TRMS
Monitoring functions: Phase sequence and phase loss
System compatibility: Three-phase networks
Mounting type: DIN rail
How to use
The relay is designed for installation on a standard DIN rail within an electrical distribution board. Wiring should be performed by a qualified professional in accordance with the provided technical diagram, ensuring that all three phases are connected to the designated input terminals. Once installed, the device automatically monitors the incoming supply. If the phase sequence is incorrect or a phase is lost, the internal relay contacts will trigger, allowing for the disconnection of the load or the activation of an alarm signal.
What to consider before purchase
Verify that your electrical system is a three-phase configuration
Ensure the installation space meets DIN rail mounting requirements
Confirm that the voltage levels of your network align with the device specifications
Usage recommendations
Regularly inspect the relay status indicators to ensure the system is operating within normal parameters. Periodic testing of the phase loss detection function is recommended to confirm that the protection circuit remains fully operational and responsive to potential electrical faults.

## FAQ

### How much does the FF CKF-BT-TRMS Phase Monitoring Relay cost, and is it available for purchase?

The price is 34.49 € (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/12444436/68747689_large.webp