DS200LPPAG1A GE | New Surplus Stock

Description

Product Introduction

The datacenter cooling pump station had 20 Mark V drives. Each drive needed 30 A at 48 V. The standard LPPA (50 A) couldn’t power two drives. The plant needed a 100 A supply. GE built the G1A. One hundred amps. 4.8 kW. Dual redundant outputs (2x 50 A channels). The pump station now runs 20 drives from 10 power supplies. The cabinet space saved. The cooling loop shared.

The DS200LPPAG1A is the high-power liquid-cooled supply for Mark V racks. It takes 480 V AC (three-phase) and outputs 48 V DC at 100 A continuous (150 A peak for 10 seconds, 7.2 kW). The board has dual redundant channels (2x 50 A) with load sharing and individual fault detection. The G1A occupies 4 slots and has dual coolant loops (redundant cooling). For large drive systems, the G1A reduces power supply count by 50%.

What makes the G1A different from the G1? Output current (100 A vs 50 A). Redundant cooling (dual loops). Higher peak power (150 A vs 80 A). The G1A also has per-channel current limiting and individual fault reporting. For large installations, the G1A is the power supply.

Key Technical Specifications

Quality Inspection Process (SOP Transparency)

High-power liquid-cooled testing requires dual coolant loops and full 100 A load.

Incoming Verification: OEM packing slip. Visual inspection: dual coolant fittings (2x inlet, 2x outlet — redundant loops), input terminals (480 V, large), output terminals (2 channels, 50 A each). The board has no fans.

Leak Test (Dual Loops, 10 bar): Pressurize each cooling loop to 10 bar for 10 minutes. No pressure drop. No leaks.

Thermal Test (65 °C Ambient, 100 A Load): Connect both coolant loops (25% glycol, 40 L/min total, 25 °C). Load each channel at 50 A (100 A total). Run for 8 hours. Monitor power semiconductor temperature — must stay <85 °C. Coolant outlet temperature rise <12 °C per loop.

Load Sharing Test (50 A per channel): Apply 100 A load (total). Each channel must provide 45-55 A (±10% sharing). Test at 50 A, 80 A, 100 A.

Channel Isolation Test: Load channel 1 at 50 A, channel 2 at 0 A (standby). Measure voltage on channel 2 output — must be <1 V (no backfeed). Reverse test.

Overload Test (150 A, 10 seconds): Apply 150 A load (both channels combined). Output must remain >44 V. After 10 seconds, current limit folds back to 100 A.

Redundant Cooling Test (Single Loop Failure): Disable one coolant loop (stop flow). Board must continue at 100 A load (redundant loop handles full thermal load). Loop temperature rise 20 °C (acceptable). Logs fault.

Field reliability note (from our RMAd board tracking): We sold 5 units of DS200LPPAG1A over 18 months. Zero field failures. 0% failure rate.

Field Replacement Pitfalls

Get these five right and you’ll cut rework time by 90%. High-power liquid cooling requires attention to both loops.

Dual Coolant Loops — Both Loops Required for 100 A
The G1A has dual redundant cooling loops. One loop handles 100 A alone (derated thermal performance). One site connected only one loop (to save plumbing). The board ran at 90 °C (still within spec but hot). Connect both loops for 100 A. Redundancy is for fault tolerance, not daily operation.

Flow Rate — 40 L/min Total (20 L/min per Loop)
Each loop requires 20 L/min minimum (40 L/min total). One site had 25 L/min total. The board ran at 85 °C (acceptable but near limit). Increase flow to 40 L/min. Use flow meters on each loop.

Channel Load Sharing — Do Not Use One Channel for 100 A
The G1A is designed for 50 A per channel (100 A total). One site connected all 100 A load to channel 1 (channel 2 unused). Channel 1 overheated (95 °C). The board current-limited to 50 A on channel 1. The load didn’t get enough power. Balance the load across both channels.

Input Power — 480 V, 3-Phase Only (Not Single-Phase)
The G1A requires 480 V, 3-phase (not single-phase like the G1). One site connected single-phase 480 V. The input current was 48 A (triple). The wire overheated. Use 3-phase. The board has a phase loss detector — it will fault on single-phase.

Coolant — Glycol/Water, 25% Minimum, Same for Both Loops
Both cooling loops must use the same coolant mixture. One site used 25% glycol in loop 1, 40% in loop 2. Different viscosities. Flow imbalance. The board overheated on loop 2 (low flow). Use identical mixture.

New Original vs. Refurbished: Why It Matters

High-power liquid-cooled boards have dual cooling plates. Refurbished boards may have blocked passages.

What “New Original (New Surplus)” means on this model:
GE manufactured the LPPAG1A in limited quantities. Our stock comes from a datacenter’s overstock — original GE cartons, board never used. Dual cooling plates are pristine. Fittings unused.

Refurbished risk in plain terms:
One refurbished G1A board we tested had a blocked cooling passage in loop 2 (scale buildup). Flow was 5 L/min (spec: 20 L/min). The board overheated at 80 A load. Another refurbished board had a stripped fitting thread (leaked).

Real cost of a refurbished failure:
A 100 A power supply failure takes down multiple drives. Downtime in a datacenter cooling pump: 50,000-100,000 per hour. A refurbished G1A sells for 5,000-8,000 online. Our new surplus price is 12,000. The difference is 4,000-7,000. One hour of downtime pays for the delta.

What we provide as proof:

• Original GE carton
• Dual-loop leak test (10 bar, 10 minutes)
• Thermal test (65 °C ambient, 100 A load, 8 hours)
• Load sharing test (50 A per channel)
• Channel isolation test
• Flow rate test (40 L/min total)
• 12-month warranty (cooling plates included)

Our price sits roughly 35% below GE’s last list price ($18,500) and about 70% above typical refurbished listings. The delta pays for dual-loop testing, load sharing validation, and cooling plate warranty.

Performance Benchmarks & Test Results

Test environment: 480 V AC 3-phase, dual coolant loops (25% glycol, 20 L/min each, 25 °C), 65 °C ambient chamber.

Output current (100 A continuous, 48 V): Stable. Channel 1: 49.8 A, Channel 2: 50.2 A. Load sharing ±0.4 A (excellent).

Output ripple (100 A load): 55 mV peak-to-peak.

Efficiency (100 A load): 93.5% at 480 V. Heat dissipation: 330 W (removed by coolant).

Channel isolation (500 V DC): Leakage current <10 µA.

Overload (150 A, 10 seconds): Output voltage 45.5 V. After 10 seconds, current limit to 100 A.

Coolant temperature rise (100 A load, 20 L/min per loop): Loop 1: 11 °C, Loop 2: 10 °C (25 °C to 36 °C).

Single-loop operation (100 A load, one loop failed): Semiconductor temperature 92 °C (still within 125 °C rating). Acceptable for fault tolerance.

Semiconductor temperature (65 °C ambient, 100 A load, dual loops): IGBTs 78 °C. Cooling plates 48 °C.

Field reliability note (from our RMAd board tracking): 5 units sold, 0 failures. Refurbished boards: tested 2 units, 1 had blocked cooling passage, 1 had stripped fitting, 0 passed. 0% acceptable. High-power liquid-cooled supplies are critical. Buy new surplus.

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