Hamilton Sundstrand Company Gas Fuel Metering Valve HFG2.0 Manual De Usuario

 

16 HFG2.0 

USER 

GUIDE

 

Note: A battery system is recommended for highest reliability.  

Note: If a 120 VDC power supply is used rather than a battery, 

ensure an output capacitance of at least 12,000 µF, which 
can both sink and source electric current. See Power 
Supply Requirements (Table 1-2). 

Note: Use a separate conduit for the power wiring. This prevents 

noise pickup and transmission from ancillary equipment, 
which could cause instability in the actuator. 

Table 1-2 below lists the power supply requirements for the HFG2.0. 

 

Voltage 

 Nominal 
 Range

 

 
120 VDC 
80 – 160 VDC 

4 VAC RMS or 12 VAC p-p 

 Maximum 
 

Continuous , Typical  

 Transient, 

Typical

 
20 Amps 
<1 Amp 
+20 A  <60 ms 
+10 A  <600 ms 
-5 A  <100 ms 

12,000 µF  (typical) 

*The output capacitance applies for non-battery power systems and assumes full-stroke step 
changes in actuator position at rated load. This value is typical. The actual value required is 
dependent on the user’s specific DC power system design, including: 

• 

Power sources used in the DC power system (their output impedance, transient response, 
rating, diode decoupling [if any], topology, etc.) 

• 

All electrical loads and components connected to each respective power bus branch 

• 

Switching relationships of these electrical loads and components to each other (for example, 
does a large motor and actuator turn off at about the same time, etc.) 

• 

Bus branch conductor length and arrangement (flat bus bars, round cables, twisted, etc.)