GE IS2020LVPSG3A

Key Specifications

Advantages & Distinctive Features

• Highest Output Capacity: 300 W total output (versus 200 W on LVPSG1A)—supports the largest Mark VIe racks with multiple processor and I/O boards.

• Superior Efficiency: >90% (versus >88% on LVPSG1A)—reduces heat generation and improves reliability.

• Active Current Sharing: Enables parallel operation of two power supplies for true load-sharing redundancy—extends life and prevents single-point failure.

• Enhanced Current Capacity: +5 V @ 35 A and +3.3 V @ 30 A—handles the most demanding configurations.

• Widest Temperature Range: –30 °C to +75 °C operation—suitable for extreme environments.

• Silicone Conformal Coating + Edge Encapsulation: Superior protection against humidity, salt spray, chemicals, and condensing environments.

• Condensing Humidity Rating: 5–100% condensing—suitable for offshore and unheated installations.

• 1000-Event Fault Log with voltage/current waveforms—enables comprehensive post-event analysis.

• Active Current Sharing Status: Monitors parallel supply operation—alerts if load is unbalanced.

• Military-Grade Manufacturing: 120-hour burn-in, 100% X-ray/AOI, military-grade components.

• Gold-Plated Captive Washer Terminals: Corrosion-resistant and vibration-proof connections.

• Hot-Swappable: No rack power-down for replacement.

• Direct Retrofit: Replaces LVPSG1A and VPWR series boards.

Application Fields

• Turbine Control Racks: Primary power source for large Mark VIe racks with high I/O density

• I/O Expansion Racks: Power for extensive distributed I/O cabinets

• Redundant Power Configurations: Parallel load-sharing for mission-critical applications

• Offshore platforms: Salt-spray and condensing environments

• Arctic installations: Extreme cold (–30 °C) environments

• Desert power plants: Extreme heat (+75 °C) environments

• Nuclear power plants: Safety-critical power applications with redundancy

• Retrofit Projects: Upgrading older power supplies for higher capacity

Comparison with LVPSG1A and Competitors

The GE IS2020LVPSG3A offers the highest output capacity, active current sharing, superior environmental protection, and military-grade manufacturing—making it the definitive power supply solution for large, critical Mark VIe systems in extreme environments.

Selection Guidelines

• When to choose:

  • Large Mark VIe racks requiring >200 W total power

  • High-density I/O configurations with multiple processor boards

  • Redundant power configurations requiring active current sharing

  • Extreme environments (–30 to +75 °C, condensing, chemical exposure)

  • Maximum reliability (nuclear, critical infrastructure)

• When to choose LVPSG1A instead: For smaller racks with <200 W power requirements and less extreme environments.

• Load Calculation: Sum all board loads—ensure total ≤300 W. +5 V rail ≤35 A; +3.3 V rail ≤30 A.

• Redundancy Planning: For load-sharing redundancy, order two GE IS2020LVPSG3A units—active current sharing automatically balances load.

• Cooling: Ensure cabinet airflow ≥200 LFM (increased requirement)—derate above 65 °C.

• Input Wiring: Use 10 AWG minimum (higher current capacity); install fast-acting fuse (35 A) or circuit breaker.

• Coating Verification: Inspect under UV (365 nm)—silicone coating shows distinct fluorescence; verify edge encapsulation bead is continuous.

• Compatibility: Fits all Mark VIe VME64x racks. Requires ControlST v7.0 or higher for active current sharing features.

Operational Precautions

1. Input Polarity: Double-check DC input polarity before power-up.

2. Load Calculation: Verify total rack load ≤300 W. Overloading is a common installation error—measure current draw during commissioning.

3. Active Current Sharing: Verify load balance (within 5%) during commissioning—unbalanced sharing indicates wiring or configuration issues.

4. Cooling: Ensure cabinet airflow ≥200 LFM—higher power output generates more heat.

5. Redundancy Testing: For redundant configurations with active current sharing, perform failover tests—verify seamless transfer without voltage dips.

6. Fault Log: Access 1000-event log via Toolbox ST—review voltage/current waveforms for trend analysis.

7. Status Monitoring: Regularly check front-panel LEDs—redundancy status LED indicates load-sharing health.

8. Coating Care: Use GE-approved silicone-safe cleaner; inspect annually under UV—rework voids with approved silicone coating per GE FSB-MKVIe-112.

9. Hot-Swap: Remove/insert slowly under power—processor auto-recognizes new module.

10. Spare Stock: Maintain 1 spare per 3–4 racks; “LVPSG3A” backward-compatible with LVPSG1A/VPWRH1A sockets.

11. Firmware Updates: Ensure the GE IS2020LVPSG3A is in “standby” mode during updates. Use ControlST v7.0 or higher.

12. ESD: Handle by edges only with grounded wrist strap—coating does not protect connectors.

13. Storage: Anti-static bag with desiccant at –40 to +85 °C; rotate every 3 years for coating inspection.