Manual 26815 QuickTrip Electro-Hydraulic Trip Block Assembly
Woodward 38
Figure 4-1. Pressure Test Ports
Special Ambient Temperature Considerations
Cold Start Procedure:
If performing a cold-start of QuickTrip in very cold ambient environment conditions (temperatures between
-40 °C to +15 °C), both the hydraulic oil within the QuickTrip manifold and the QuickTrip manifold itself
must undergo a warmup procedure prior to starting the turbine to ensure the QuickTrip will operate within
specified performance limits. In particular, slew open times increase at lower hydraulic fluid temperatures
due to the higher viscosity (lower fluidity) of the hydraulic oil.
Before starting the QuickTrip, follow the warm-up procedure below:
1. De-energize all QuickTrip modules (valves should be open)
2. Start flow of warm hydraulic fluid through QuickTrip such that the temperature of the oil flowing from
the drain side of QuickTrip is at or above +15 °C.
3. Allow the warm hydraulic fluid to flow through QuickTrip for at least 30 minutes, while maintaining the
temperature at the drain side of QuickTrip at or above +15 °C.
4. Energize all QuickTrip modules
5. Use the ProTechTPS to run an auto sequence test on QuickTrip (sequentially de-energizing and re-
energizing each channel individually)
6. After the auto sequence test is complete, check the trip time log and verify each QuickTrip module
tripped in less than 50 ms.
7. If QuickTrip is to be operated continuously in very cold ambient environment conditions, the hydraulic
oil temperature flowing from the drain side of QuickTrip must be continuously maintained above +15
°C.
8. Alternate methods of heating/insulating the QuickTrip and the hydraulic fluid lines upstream from
QuickTrip in very cold ambient environment conditions are recommended and might include the use
of heat tape, heat blankets and insulation.
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