380V three-phase three-wire power failure alarm model (power failure will ring, call will not ring): when power failure, the alarm will sound, until the call or turn off the switch.

By default, the product is powered off. If you need a power off call, the price is 2 yuan for a set. Call power failure alarm model (power failure calls will ring): when power failure or call, the alarm sound will be sent out immediately for 2 minutes. After 2 minutes, the sound will stop, and then it will ring for 15 seconds every 2 minutes. This cycle, until the master turns off the switch and turns it back on. The sound of incoming calls and power outages is different, which is easy to distinguish.

Purpose and scope of application
power off alarm applicable to three-phase circuit as power supply, line power off alarm. Widely used in industrial and mining enterprises, government agencies, substations and other units. As a power failure warning product.
This product is small in size; Beautiful and elegant in appearance; Flexible and convenient to install and use; High sensitivity; Intelligent alarm; Excellent and reliable performance; The alarm sound reaches 120 decibels.
This product is installed in the duty room. When the voltage is too low, the power supply is stopped or the wire is maliciously cut off, the alarm will sound and alarm in time for pre-alarm, and the personnel on duty can take measures to prevent it in time.

Alarm product features:
● prevent thieves from cutting off the power supply to commit crimes such as theft.

● under normal power supply conditions! If there is a sudden power failure (power failure) or lack of phase, the alarm will immediately alert people.

● automatically turn off the alarm function when the power supply is normal.

Usage

1. Open the battery back cover, install a 9V battery (pay attention to the direction of positive and negative), cover the battery back cover

2. Connect the alarm monitoring power cord to A, B, C, three-phase three-wire and phase line respectively in order to keep power-up state, and turn the alarm side switch to the "ON" position, after hearing a tone, it indicates that it enters the detection state.

3. In case of power failure, power failure and lack of phase, the alarm immediately sends out alarm sound and alarms on site (note that the alarm can work normally only when the battery is installed)