GE IS200JPDGH1A / IS200JPDGH1ABD
Mark VI / Mark VIe Jumper Power Distribution Board (JPDG)
Product Overview
IS200JPDGH1A is a Jumper Power Distribution Card (JPDG) used in GE Mark VI / Mark VIe Speedtronic turbine control systems. The IS200JPDGH1ABD is the updated/revised version with additional revision levels (A/B/D).
This board is installed in the Power Distribution Module (PDM) and is responsible for distributing control power and wetting power to multiple I/O and control boards within the turbine control cabinet.
Key Functions
1) DC Control Power Distribution
The board receives 28 VDC control power from external power supplies and distributes it across the Mark VIe control system.
Main capabilities:
- Dual redundant 28 VDC inputs
- Fuse protection for all outputs
- Supplies power to multiple JPDH and I/O boards
It can:
- Feed up to four JPDH boards
- Feed up to seven I/O terminal boards
2) Wetting Power Distribution (24V / 48V DC)
The JPDG board also distributes wetting power used for digital input circuits and field signals.
Supported wetting voltages:
- 24 VDC
- 48 VDC
(Selectable depending on system design)
3) AC Power Monitoring
Although it distributes DC power, the module also monitors AC power health:
- Supports 115V / 230V AC sensing
- Sends diagnostics to control system
This helps operators detect power problems early.
4) Ground Fault Detection
A built-in resistor-center grounding circuit detects ground faults in the power bus, improving turbine system safety and reliability.
Technical Highlights
| Item | Specification |
|---|---|
| System | GE Mark VI / Mark VIe Speedtronic |
| Functional acronym | JPDG |
| Function | Jumper Power Distribution Card |
| Max current | Up to 40 A |
| Input power | 28 VDC control power |
| Wetting power | 24 / 48 VDC |
| AC monitoring | 2 channels |
| Coating | Conformal coated PCB |
| Integration | Works with PPDA I/O Pack |
Sources confirm it is a core PDM power hub inside turbine control cabinets.
IS200JPDGH1ABD Revision Meaning
The suffix ABD indicates hardware revisions:
- A = Functional revision A
- B = Second functional revision
- D = Artwork revision
It is a modified version of the IS200JPDGH1 parent board.
Practically:
- Same function
- Improved reliability / compatibility
- Later production revision
Typical Applications
Used in gas / steam turbine control cabinets for:
- Power distribution to I/O modules
- Turbine protection and control systems
- Power health monitoring
- Industrial power plant automation
Mark VI systems were widely used in power plants worldwide.
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