notice Note: Please be cautious and check with your supplier if this product is for virus protection purposes and if the coronavirus (COVID-19) will affect your order. close

Wired Power Failure Alarm sensor detector AC 220v/380v three-phase for kc868 smart home control system mobile app message

  • 1-9 Sets
  • >=10 Sets
Power Failure Alarm
- +
0piecesselected, US $in total
View Details
Shipping fee:
Depends on the order quantity.
Lead Time:
3 day(s) after payment received
Contact Supplier
Report Suspicious Activity
Quick Details
Place of Origin:
Zhejiang, China
Brand Name:
Model Number:

Packaging & Delivery

Selling Units:
Single item
Single package size: 
10X10X5 cm
Single gross weight:
0.300 kg
Lead Time :
Quantity(Sets) 1 - 10 >10
Est. Time(days) 3 To be negotiated
Video Description

A. Product characteristics:

The power-off sensor will output N/O and N/C switching value signal, when any phase is power off from the phase A, phase B and phase C of the three-phase AC, or the municipal power grid is power off.

It is suitable for kinds of industries, such as communication room, hospital, power supply, the customs, banks, government, factories and so on.

It can advice the alarm of power-on and power-off through customized smart phone or GSM message.

B. Technical performance:

1. Alarm mode: when phase A, phase B and phase C in the three-phase AC power or 220v power grid are monitored by the power-off sensor, any phase is power off, the sensor will output the N/O and N/C switching value signal.

2. Monitoring voltage: AC380v + 20%, AC220v + 20%, 380v three-phase three-wire system (customized).

3. High voltage isolation: the insulation voltage of the detector and trigger is greater than 1500v.

4. Flame-retardant and explosion-proof: made of semiconductor contactless switch element, it will never appear the spark phenomenon when it is on and off. So it can be used in flame retardant and explosion-proof occasions.

5. Safe and reliable: there is no heating element. It will not occur temperature rising phenomenon when long-term high temperature and high voltage operation. The shell will not become hot when touching by hands.

6. Working environment: temperature-30 ℃ ~ + 90 ℃, relative humidity ≤ 90% RH.

7. Volume: 86*36*58 mm.


C. Installation

1. 380V installation


(1) A, B, C and N terminals of the sensor are respectively connected to phase A, phase B, phase C and zero wire of AC380v.

(2) The N/C of the sensor (normal closed), COM (common), N/O (normal open) is the dry contact of the relay.

2. 220V installation


    A, B and C terminal of the sensor connect together to the live wire of the AC220v, and

N terminal connects to the null wire of the AC220v.