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Three-phase monitoring/protection relay for phase failure/asymmetry/voltage control
- Regular price
- €30,36
- Regular price
-
- Sale price
- €30,36
- Unit price
- per
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Pre-order product
- Description
- Payment methods
- Warranty
Phase protection relay without neutral conductor - with asymmetry control and phase sequence control
The phase protection relay is designed to protect three-phase motors and other voltage-sensitive devices. It ensures safe operation even in an unstable network by controlling phase asymmetry, phase failure control, and, in selected models, correct phase sequence control.
The device operates without a neutral conductor, facilitating its installation in industrial distribution systems.
Phase voltage control range: 240-500 V AC.
Application and operating principle
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Connect the relay according to the attached diagram.
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Adjust:
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Permissible asymmetry value (%)
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Fault delay (DT)
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Reset time (RT)
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If the voltage is within the normal range and the asymmetry does not exceed the set limit, the relay will connect and the RELAY indicator will light up.
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In versions with phase sequence control, the L1-L2-L3 sequence must also be correct.
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If the voltage of any phase exceeds the asymmetry limit, the ASM. (asymmetry) indicator lights up and the relay disconnects after the DT delay.
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When the voltage returns to normal, the RT reset time countdown begins. The fault then clears and the relay reactivates.
Asymmetry calculation
The following formula is used to determine asymmetry:
Asymmetry = ((Max. Voltage - Min. Voltage) / Max. Voltage) × 100%.
Example:
((245 V - 200 V) / 245 V) × 100 = 18.3%.
This value should be adjusted according to the type of connected load.
Technical specifications
| Parameter | Value |
|---|---|
| Operating voltage | 3×380 V AC, 50/60 Hz |
| Rated auxiliary voltage (model FKM-05 / 05F) | 220 V AC, 50/60 Hz |
| Asymmetry range | 5-25 % |
| Fault delay setting (DT) | 0.1-20 s |
| Reset setting (RT) | 0.1-20 s |
| Power consumption | < 6 VA |
| Operating temperature | -20 to +55 °C |
| Signalling | 4× LED indication |
| Installation | DIN rail |
| Output contact | 5 A / 250 V AC (resistive load) |
| Max. altitude | < 2000 m |
| Max. conductor diameter | 2.5 mm |
| Weight | 0.210 kg |
Online card payment - after completing the order, you will be redirected to the payment gateway, payment confirmation will be sent to you by email
Cash on delivery - payment is made to the transport company's driver according to payment regulations
Bank transfer - you will receive a proforma invoice by email no later than the next business day, which will contain the account number you need to enter when making the payment.
Invoice - this payment option is available to partners who have a framework agreement signed with our company.
If you want to use the last 2 options, please call our manager and they will instruct you on how to obtain an invoice with or without VAT.
The electrical devices we supply meet high quality standards, have a 24-month warranty, and comply with all EU requirements.
We also offer free shipping for orders over €100, a flexible system of discounts and promotions. The technical knowledge and experience of our employees allow us to provide high-quality advice and, if necessary, offer alternative electrical product solutions.
The electrical equipment we supply meets high quality standards, has a 24-month warranty and complies with all EU requirements.
In case of a claim, product returns are free of charge.
