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

Fault Type

Persist Time

Fault Action

Motor

10 Sec

1 Sec

Motor temp > 130° C, Fault.

. If fault exists and

Motor temp > 135° C for 10 Sec, shutdown.

Motor temp > 130° C, Fault

. If fault exists and Motor

temp > 130° C for 60 Sec, shutdown.

Electronics

10 Sec

1 Sec

Electronics temp > 110° C, Fault.

If fault exists and Electronics temp > 115° C for 10 Sec,
shutdown.

Electronics temp > 110° C, Fault.

If fault exists and Electronics temp > 100° C for 15 Sec,
shutdown.

Table 3-4. Fault Configuration For OVERTEMP Alarm

Automatic Shutdown Feature

The HFG2.0 has a self-protective shutdown feature. The HFG2.0 will
shutdown if:

• Any two motor winding temperatures exceed 135 °C for ten (10)

seconds

or more (130

°C for 60 seconds )

• The electronics temperature exceeds 115 °C for 10 seconds or

more (100

°C for 15 seconds )

Note: The POSITION and MOTOR CURRENT feedback signals

will both be set to 0 mA when the current to the actuator
motor is removed.

WARNING

Property Damage and Injury Hazard – If the motor windings exceed
135

° C

(130

°C ) or the electronics exceed 115° C

(100

° C ), the MCE will shut down power to the motor and

electronics thereby allowing the actuator to move with load. When
power is removed, the return spring causes the poppets to return to
the soft seats, thereby closing the valve. Touching the HFG2.0 may
result in serious burn injury

CH. 3: OPERATING THE HFG2.0