ABB 216BM61B Power module

The 2301D-ST’s Over Speed test Function allows an operator to increase turbine speed above its rated operating range to periodically test turbine electrical and/or mechanical over speed protection logic and circuitry. The Over Speed Test will allow the control’s speed setpoint to be increased above the normal maximum limit. This test can be performed from the Service Mode of Watch Window software, through external commands or via the Modbus commands.

Overspeed Test 

1. Close the Overspeed Test Enable discrete input (if configured) or the Overspeed Test Enable in the service menu I**Overspeed Test**. 2. The Overspeed Test Status menu item in service menu I**Overspeed Test** should switch from Overspeed Trip Test In-active to Overspeed Trip Test Active. 3. The Speed Raise contact can now be closed, to allow the speed setpoint to be set above rated speed range.

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