The WHMI allows secure access to the merging unit via a Web browser. When the Secure Communication parameter in the merging unit is activated, the Web server is forced to take a secured (HTTPS) connection to WHMI using TLS encryption. The WHMI is verified with Internet Explorer 8.0, 9.0, 10.0 and 11.0.
WHMI offers several functions.
- Programmable LEDs and event lists
- System supervision
- Parameter settings
- Measurement display
- Disturbance records
- Phasor diagram
- Importing/Exporting parameters
- Report summary
The WHMI can be accessed locally and remotely.
- Locally by connecting the laptop to the merging unit via the front communication port.
- Remotely over LAN/WAN.
WHMI is enabled by default on the rear port and always enabled (cannot be disabled) on the front port.
If the WHMI is accessed locally via the front communication port, the following features are available.
- Setting the merging unit to test mode and testing of outputs
- Trip circuit lockout reset
- Restoring factory settings