GE IS400JPDDG3A Gas Turbine Mark VIe DC Power Distribution Grounding Diagnostic Module
I. Basic Information
Manufacturer: GE (now GE Vernova)
Part Number: IS400JPDDG3A
Control System Affiliation: Speedtronic Mark VIe / Mark VIeS Gas Turbine and Steam Turbine Control System, also used in EX2100 Generator Excitation Cabinet
Module Type: JPDG DC Power Distribution + Ground Fault Diagnosis Card, DIN Rail Installation, Made in the USA
Dimensions: 16.51cm (Height) × 17.8cm (Width), Operating Temperature Range: -30℃ ~ +65℃, Suitable for Long-Term Operation of Power Control Cabinets
Core Functions (Core Components for Generator Cabinet Power Supply)
Multi-Path DC Power Distribution
Receive two redundant 28VDC inputs (via external diodes for power redundancy switching), distribute the outputs to the main control and IO cards of the cabinet; each 28V output comes with an independent fuse, and a single short circuit will not cause the entire cabinet to lose power.
Provide 24VDC / 48VDC DI Wet Power Supply, providing excitation power for on-site switch quantity input circuits.
Online Monitoring of DC Ground Fault
Use floating DC wet power bus + ground bias resistor design, combined with PPDA I/O acquisition package to collect ground voltage feedback, real-time detect leakage on the DC bus and line-to-ground short circuits, promptly report “DC Ground Fault” alarm, early detect potential hazards, and avoid unplanned shutdown of the generator due to concealed ground faults.
Monitoring of AC Power Supply Status
Can monitor the upstream AC power distribution status of the two paths, warning of abnormal power supply at the front end of the cabinet.
Expansion of Diagnostic Access
Can connect additional multi-block power distribution boards’ diagnostic feedback signals, and uniformly upload them to the Mark VIe main control system.
Interface Description
Screw-type Terminal: External connection for AC/DC power supply and ground detection circuits;
JA1 Interface: Connects to the PPDA I/O module, transmits ground fault feedback signals;
P2 Interface: Receives diagnostic signals from other extended power distribution boards.
Key Purchase Distinction (Very Easily Confusing Models) Table
Material Number Product Function Whether it can be directly replaced IS410JPDGH1A
IS410JPDGH1A DC power distribution + Ground fault diagnosis card Current gas turbine spare part
IS410JPDHG1A Distributed I/O processor board With different letters, the hardware is completely incompatible and严禁 to be mixed
Typical Application Scenarios
Power management of the main control cabinet of the combined cycle power station gas turbine；
Power distribution monitoring of the Mark VIe control system of thermal power steam turbine units；
Internal power supply and grounding protection of the EX2100 excitation system of the generator；
Maintenance and replacement of control systems for large-scale turbo machinery in LNG， refineries， and offshore platforms.
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