GE IS220PSFDH1A Flame Detector Power Supply Module

GE IS220PSFDH1A Flame Detector Power Supply Module

Functional Description

The IS220PSFDH1A Flame Detector Power Supply (PSFD) typically mounts above the primary gas turbine trip

protection (TRPG) terminal board. The source power is 28 V dc, from a power distribution board (JPDL). The

output is rated for 335 V dc, 5 mA. Three power supplies are connected to J3, J4, and J5 of the TRPG in a

diode-ORed, TMR configuration to power up to eight flame detectors. Each supply can power all eight

flame detectors should the other two power supplies fail.

The main features of the PSFD include:

• Convection cooling – no cooling fans used

• Ambient temperature range is -30 to 65ºC (-22 to 149 ºF)

• 28 V dc input ±5% (26.6 to 29.4 V dc)

• Unregulated output varies with input ±5% (318 to 352 V dc)

• 1700 V dc isolation

• Output over voltage protection

• Test point pair to monitor Attenuated 335 V dc Output

• Three diagnostic LEDs

• Outputs can be diode-ORed with external diode.

• Output current limit at 7 mA dc

• Soft start hot swap input limits inrush current to 550 mA peak.

• Input filtering limits emissions and reduces sensitivity to input interference

Technical Specifications