GE IS2020RKPSG3A | Original 400 W Mark VI VME Power Supply

Description

• Model & Brand: GE IS2020RKPSG3A
• Functional Designation: RKPS
• Product Family: GE Speedtronic Mark VI
• Part Type: VME Rack Power Supply Module
• Primary Function: Supplies DC power to the Mark VI VME control and interface rack.
• Input Voltage: 125 VDC nominal
• Rated Output Power: 400 W
• Main Outputs: +5 VDC, +12 VDC, +15 VDC, and +28 VDC
• Additional Output: Optional 335 VDC output for applicable flame-detector circuits
• Mounting Location: Right side of the Mark VI VME control/interface rack
• Front Controls: One power/fault-reset toggle switch
• Status Indicators: Green, red, and yellow LEDs
• Approx. Physical Dimensions: One current supplier record reports approximately 8.5 × 34 × 38.5 cm for the shipped unit; this should be treated as a logistics estimate rather than an OEM dimensional specification.
• Reported Shipping Weight: Approximately 7.1 kg from one supplier record. Another supplier lists approximately 0.35 kg, clearly demonstrating that published weight data can refer to different packaging or catalog conventions. For freight, weigh the actual shipment.
• What’s in the Box: IS2020RKPSG3A power-supply assembly unless the purchase order specifically includes cables, mounting hardware, or related Mark VI power-distribution accessories.

The strongest technical identification is IS2020RKPSG3A = RKPS VME Rack Power Supply Module, with a documented 400 W output rating and 125 VDC input. It belongs to the Mark VI power architecture and is mounted beside the VME control/interface rack.

Product Introduction

The GE IS2020RKPSG3A occupies a critical physical position on the Mark VI VME rack: it converts the incoming rack supply into the DC rails required by the VME backplane and associated turbine-control hardware. Its documented output group includes +5, +12, +15, and +28 VDC, with an additional 335 VDC supply available for the applicable flame-detector arrangement.

Do not confuse this unit with a generic 24 VDC industrial power supply. The G3A configuration uses 125 VDC input, and GE produced multiple RKPS versions with different input/output requirements. The 400 W rating, side-mounted mechanical arrangement, front fault-reset switch, and Mark VI-specific output architecture make exact part-number control essential (especially when maintaining an older turbine cabinet).

Core Technical Specifications

The 400 W output rating, 125 VDC input, +28 VDC PSA outputs, side-mounted arrangement, switch, and three LED indicators are consistently identified in current technical records.

Power-system caution: The individual rail limits should be calculated from the applicable Mark VI power-distribution documentation. Do not assume that every listed output can simultaneously deliver its maximum value while the assembly remains within the 400 W total rating.

GE IS2020RKPSG3A

Global Compliance & Industry Certifications

The IS2020RKPSG3A is a legacy turbine-control rack power assembly. Certification should therefore be established against the exact Mark VI equipment configuration and manufacturing revision.

• CE Mark: Verify the applicable GE Mark VI system declaration and installation documentation. A system-level CE declaration should not automatically be converted into a standalone CE claim for the loose RKPS module.
• UL/cUL: No reliable standalone UL/cUL listing was established for the individual from the available records.
• ATEX / IECEx: The module should not be represented as intrinsically safe. The optional 335 VDC output in particular reinforces the need to evaluate the complete flame-detection/protection circuit rather than the PSU in isolation.
• Marine / DNV: No standalone DNV approval was reliably established for this exact RKPS assembly.
• EMC: EMC conformity should be assessed against the complete Mark VI cabinet, rack, grounding, and cable arrangement.
• Functional Safety: The power supply supports turbine-control hardware, but it should not independently be assigned a SIL certification without the applicable Mark VI system safety documentation.

The 335 VDC output deserves particular audit attention. A power-supply assembly capable of providing this voltage should be handled under the site’s appropriate electrical isolation, labeling, and qualified-person procedures.

Verify specific lot certifications with OEM.

Long-Term Storage & Asset Preservation Guide

Keep the RKPS in ESD and moisture-protective packaging. Although this is a power assembly rather than a processor board, it contains power semiconductors, capacitors, connectors, and a heatsink structure that can suffer from contamination or mechanical damage during long storage.

Keep humidity below 60% RH where practical. Stable, dry storage is preferable for multi-year inventory, particularly because oxidation at power connectors can create high-resistance joints and abnormal heating after installation.

Do not repeatedly energize a shelf spare without an approved test procedure. The assembly contains power-supply capacitors and multiple output circuits. Where extended storage has occurred, perform controlled inspection and electrical testing before field release rather than simply applying full rack power.

Preserve the complete G3A identity. GE produced several RKPS variants with different electrical characteristics. A generic “Mark VI power supply” inventory description is not sufficient (the input-voltage class must remain visible in the warehouse record).

Physical Installation Prerequisites

The is designed to mount on the right side of the Mark VI VME control/interface rack. It is not a standard DIN-rail power supply and should not be installed independently of the associated Mark VI rack architecture.

Input power: This specific G3A model is identified with a 125 VDC nominal input. Verify the source, polarity, protective device, and Mark VI power-distribution arrangement before energization.

Output loading: Calculate the complete rack demand across the +5, +12, +15, and +28 VDC rails. Keep the combined requirement within the documented 400 W assembly capacity.

High-voltage circuit: When the 335 VDC output is present in the installation, treat the relevant terminals as hazardous electrical points. Confirm discharge time and absence-of-voltage before service.

Cooling: Preserve the original rack’s ventilation path around the power supply and its metal heatsink fins. Do not impose a generic 50 mm clearance where the original Mark VI cabinet drawing specifies another arrangement.

Grounding: Maintain the Mark VI protective-earth and rack bonding scheme. Do not use low-voltage signal returns as substitute protective-earth conductors.

Mechanical installation: Check mounting screws, rack interfaces, power connectors, and cable strain relief before energization. Loose mechanical hardware can increase contact resistance and produce thermal damage under load.

Buyer’s FAQ — Logistics & Compliance Focus

Q: What HS Tariff Code should I use for ?
A: A classification under HS 8504.40 may be considered because the device is a static power-conversion/power-supply assembly. Some commercial records use 850440 classifications for this type of Mark VI rack supply. The final national tariff code must be validated against the importing country’s tariff schedule and the actual technical function declared on the invoice.

Q: What Country of Origin should I declare?
A: Use the actual manufacturing origin supported by the physical label or GE traceability documents. One current supplier record reports USA, but reseller-origin fields are not sufficient evidence for a formal COO declaration. Retain the nameplate photograph, COO statement, invoice, and packing list together.

Q: Should I insure one during international transport?
A: Yes when the Mark VI turbine is production-critical. Although supplier weight records are inconsistent, one current shipment record reports 7.1 kg, making rigid packaging important. Protect the heatsink, power connectors, switch, and housing against shock; use ESD protection, moisture protection, tracking, and cargo insurance based on the documented replacement value.

Q: Does the arrive with the latest firmware pre-loaded?
A: No. This is a VME rack power supply, not a programmable controller or I/O processor. There is no conventional application firmware to validate on the power-supply assembly. Acceptance should focus on the exact G3A identity, input-voltage rating, output-rail performance, protection behavior, certification record, and physical condition.

Q: Can I substitute another IS2020RKPS revision?
A: Do not assume interchangeability. GE documented multiple RKPS versions with different input and output requirements. The G3A uses the 125 VDC configuration, while another RKPS model may be designed for a different input class or output arrangement. Match the complete part number and Mark VI rack design before substitution.