Woodward 8404-2033 L-Series Speed Control–Actuator with ITB

This manual describes the ProTech® electronic two-out-of-three Overspeed

Protection System. The manual explains the operation and gives the

configuration procedures for the system. This manual does not contain

instructions for the operation of the complete turbine system. For turbine- or

plant-operating instructions, contact the plant-equipment manufacturer.

Before doing any installation, maintenance, adjustments, or configuration on the

ProTech 203 system, read manual 82715. Guide for Handling and Protection:

Electronic Controls, Printed Circuit Boards, Modules.

Table 4-3 gives the maximum overload

protection for supply mains connected to any single or redundant pair of MicroNet Plus main power

supplies. It is not recommended that both MicroNet Plus main power supplies of a redundant pair be

connected to a single source, since failure of that source would disable the system.

Multiple chassis systems using MicroNet Plus power supplies may have power supplies of the same

model, but in different chassis, connected to the same source. In this case, each branch to a chassis

must have its own overcurrent protection sized according to Table 4-3. and the power source must be

sized for the sum of the branches.

In the event that on supply needs to be replaced, the recommended method for changing

Power Modules is with the power off (to the module being removed and the module being inserted).

The system will tolerate this “cold swap” method without failure.

Each main power supply has four LEDs to indicate power supply health (OK, Input Fault,

Overtemperature, and Power Supply Fault).

See MicroNet Plus Power Supply Troubleshooting (Section 5.5) for a description of the LED indications.

Input power connections are made to the power supply through a plug/header assembly on the front of

the power supply.