Three-Phase Power Supply Support for Both Star/Wye and Delta Configurations

 We are seeking a quotation for the manufacturing and development of an IoT device designed

to measure temperature using six NTC sensors and monitor the power of a three-phase power

supply, with support for both star/wye and delta configurations.

Key system requirements:

● Power Supply: The device must be powered by the power supply being monitored, 85 ~

305 VAC.

● Connectivity: The system should support Wi-Fi communication and be accessible as an

IoT device via an online platform for diagnostic checks and Over-The-Air (OTA) updates.

● Cable Requirements: A cable has to be supplied, featuring a 14-pin connector (or

alternative) on one side, with the other side consisting of:

○ Six NTC sensors

○ Three current clamps for current monitoring

○ Three terminal ring connectors for AC line connection.

● Firmware Development: Firmware for the system also has to be developed.

● Sensors accuracy and range:

○ Temperature: -50 - 150 C (+- 5%)

○ Voltage: 0 - 450 V (+- 5%)

○ Current: 0 - 100A (+- 5%)

○ Sensor cable length: 2 meters

○ The system must be able to measure apparent power, active power and power

factor

● On-board sensors diagnostics: The compute board must be equipped with a

temperature, pressure and humidity sensor:

○ Temperature: -50 - 150 C (+- 10%)

○ Pressure: 300 - 1200 hPa (+- 10%)

○ Humidity: 0 - 100RH% (+- 10%)

● LED: A RGB LED must be visible on the exterior of the box to provide information about

the state of the sensors.

● Waterproofing: IP65

Device Specifications:

● Size: Maximum dimensions of 12 cm x 12 cm x 12 cm

● Compute Chip: Choice of compute chip is at your discretion

● Data Sampling Rate: 10 Hz

● Input Power Supply: 85 ~ 305 VAC

We would like to receive a quotation for a quantity of 1,000 units.

 

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