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Phone: +86 16626708626Description
Key Technical Specifications
- Part Number: IS2020RKPSG1AI-REP
- Manufacturer: General Electric
- Series: Mark VI turbine control
- Product Type: VME rack power supply / power supply terminal board
- Input Voltage: 125 VDC
- Output Rails: +5 V, ±12 V, ±15 V, ±28 V DC
- Optional Output: 335 V DC for flame detectors
- Mounting: Side-mounted on VME control and interface racks
- Status Indicators: Yellow, red, green LEDs
- User Control: Power switch with fault reset function
- Operating Temperature: -30 C to 65 C
- Manual Reference: GEH-6421I
Product Introduction
GE IS2020RKPSG1AI-REP is a Mark VI VME rack power supply used in GE turbine control systems. It mounts on the side of the control rack and feeds the backplane with the required DC rails, including the optional 335 V DC flame detector output on some versions.
This part is chosen when a site needs the exact GE rack power supply format and output set, not a generic substitute. The main buying check is whether your rack uses the 125 VDC variant and whether the replacement suffix matches the existing hardware family.
- IS2020RKPSG1AI-REP
- IS2020RKPSG1AI-REP
Troubleshooting Quick Reference
| Symptom | Possible Cause | Relevance to This Part | Quick Check Method | Recommendation |
|---|---|---|---|---|
| Rack has no power | Missing 125 VDC input, blown fuse, or failed PSU | ✅ High | Measure DC input at the supply terminals and check the upstream fuse | Verify incoming power before replacing the unit |
| Green LED never comes on | Internal PSU fault or no valid input | ✅ High | Check the yellow/red/green LED pattern and measure input voltage | If input is correct, the supply is likely bad |
| Red fault LED stays on | Overload, internal fault, or shorted downstream module | ✅ High | Isolate the load and measure backplane rails | Remove the downstream fault before condemning the PSU |
| Intermittent rack resets | Loose wiring, input sag, or overloaded output rails | ✅ High | Monitor 125 VDC input under load and inspect terminal tightness | Check wiring and load current before replacement |
| 335 V detector circuit missing | Optional output not present on this variant or output fault | ⚠️ Medium | Confirm the exact suffix and measure the detector output only if your version includes it | Verify variant and OEM documentation first |
| Supply runs hot or smells burnt | Overload, blocked airflow, or internal component failure | ✅ High | Inspect cabinet airflow and measure output currents | Reduce load and replace the supply if the fault persists |
If you get stuck, send technical support clear photos of the label, rack slot, wiring, and diagnostic logs.
Frequently Asked Questions
Q: Is IS2020RKPSG1AI-REP a direct replacement for other GE rack power supplies?
A: Not automatically. The suffix and output version matter, and the wrong variant can fit physically but still fail electrically.
Q: What does this module do?
A: It supplies the DC rails for the Mark VI VME rack, including +5 V, ±12 V, ±15 V, and ±28 V outputs. Some versions also provide 335 V DC for flame detectors.
Q: Is this the same as IS2020RKPSG1A?
A: It is related, but do not assume it is identical without checking the exact suffix and configuration. GE rack power supplies can differ by input style and output options.
Q: Can I hot-swap it?
A: No, not in normal practice. Kill power and verify the rack is safe before removal, because pulling a supply under load can take the whole control rack down.
Q: Why do some listings show 24 VDC and others show 125 VDC?
A: GE offered multiple input versions for different sites. You need the one that matches your cabinet power architecture, or the rack will not run correctly.
Q: What should I verify before ordering?
A: Confirm the exact part number, suffix, input voltage, output rails, and whether your unit needs the optional 335 V DC output. Also ask for test status and warranty terms.
Q: Why is this cheaper than factory new?
A: Usually because it is surplus or a tested used unit. That is fine as long as the seller is clear about condition, test method, and physical inspection results.
