The WHMI allows secure access to the protection relay via a Web browser. When the Secure Communication parameter in the protection relay 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.
Note: WHMI is disabled by default.
Note: Control operations are not allowed by WHMI.
WHMI offers several functions.
- Programmable LEDs and event lists
- System supervision
- Parameter settings
- Measurement display
- Disturbance records
- Fault records
- Load profile record
- Phasor diagram
- Single-line diagram
- Importing/Exporting parameters
- Report summary
The menu tree structure on the WHMI is almost identical to the one on the LHMI.
The WHMI can be accessed locally and remotely.
- Locally by connecting the laptop to the protection relay via the front communication port.
- Remotely over LAN/WAN.