Item No.: LYAP-A6

Key Specifications：

Overvoltage protector, professional level voltage abnormality protection, automatic disconnection and restoration of power supply, ensuring safe and stable operation of equipment.
1. Phase voltage 380V/line voltage 220V can be manually switched for display
2. It must be connected to the neutral wire and have a zero protection function
3. Three phase unbalance protection
4. Current imbalance protection
4. Phase sequence protection
5. Phase loss protection
6. Overvoltage, undervoltage, overcurrent, and delay protection
7. Use frequency 40/50/60/70Hz
8. Continuous overcurrent count

This advanced over and under voltage protector integrates smart logic control to enhance protection accuracy and operational reliability.

🔹 Key Technical Knowledge

Control logic: Smart voltage analysis
Protection type: Over & under voltage
Installation: DIN rail
Application: Advanced distribution systems

🔹 Why choose this product?

More accurate protection decisions
Reduced false triggering
Higher system stability

🔹 OEM & Manufacturing Advantage

We support smart-function OEM customization and firmware-level parameter matching for partners.

🔹 Use Cases / Industries

Residential apartments and villas
Backup power systems with voltage fluctuation
HVAC and motor drive circuits
Electrical distribution board OEMs
Commercial building power safety

Set
character

Technical
parameter

Set

range

Default
value

Stepforward

Technical
parameter

Set

range

Default
value

Stepforward

P-1

Power-ondelaytime

1s-600s

P-9

Three-phasevoltage
unbalancerecoveryvalue

5V-95V

20V

P-2

Protectionrecoverydelay

1s-600s

30s

P-10

Three-phasevoltage
calibration

-9.5V~9.5V

P-3

Overvoltageprotection

value

230V-300V

270V

P-11

Phase-sequence

switch

ON/OFF

P-4

Overvoltagerecovery

value

225V-295V

265V

P-12

Overcurrent
protectionvalue

1A~63A
1A~80A
1A~999A

63A

80A
99.9A

P-5

Undervoltage
protectionvalue

120V-210V

170V

P-13

Overcurrentprotection
operationtime

0.1s~10s

0.5s

0.1s

P-6

Undervoltagerecovery
value

125V-215V

175V

P-14

Numberofcontinuous
overcurrentprotection

0~20

OFF

P-7

Voltageprotectionaction
delay

0.1s-10s

0.5s

P-15

Threephasecurrent

errorvalue

-9.5A~9.5A

P-8

Three-phasevoltage
unpalancevalue

20V-100V

50V

Display panel

Reset/startdelay display

Phase sequence errorindication

Indication of continuous over current faults

FAQ

1. What is the Smart Over & Under Voltage Protector with Delay Control?
The Smart Over & Under Voltage Protector with Delay Control is an advanced electrical protection device engineered to monitor incoming AC supply voltage and disconnect power when voltage goes outside set safe limits, re-energizing after a configurable delay.

2. How does delay control improve protection?
The delay control function prevents unnecessary power loss during short-duration fluctuations by waiting for voltage to stabilize before reconnecting, which improves both user comfort and system reliability.

3. What protection functions does it support?
It offers dual-mode protection — over-voltage shutdown, under-voltage shutdown, and automatic reconnection — making it suitable for sensitive electrical systems.

4. Is this voltage protector compatible with standard panels?
Yes. It supports 35 mm DIN rail mounting, allowing it to be easily installed in residential, commercial, and industrial distribution boards.

5. Does this product comply with any international standards?
This device is manufactured according to international electrical safety benchmarks and undergoes factory testing to ensure stable performance in diverse markets.

6. Can I get OEM versions of this protector?
Absolutely. As a factory-direct manufacturer, we provide OEM/ODM customization, tailored packaging, and bulk supply for distributors and system integrators.