DS200LPPAG1AAA GE | New Surplus Stock

Description

Product Introduction

The Arctic drilling rig had drives outdoors at -40 °C. Liquid-cooled power supplies were the only option (air cooling impossible). But the coolant froze. GE built the AAA. Heated coolant loop (thermostat at 5 °C, 500 W heater). Antifreeze good to -50 °C. The power supply starts at -40 °C. The coolant circulates. The drives run. The rig operates through the polar winter.

The DS200LPPAG1AAA is the Arctic liquid-cooled power supply for Mark V drives. It has a 48 V DC output at 100 A (4.8 kW), dual redundant outputs (2x 50 A), and a heated coolant loop (500 W heater, thermostat at 5 °C). The AAA board uses propylene glycol (60/40 water/glycol, good to -50 °C) and has a built-in circulation pump (magnetic drive, no seals to leak). The board operates at -40 °C ambient and keeps the coolant above freezing.

What makes the AAA different from the G1A? Heated coolant loop. Built-in pump. Arctic-rated components (-40 °C). The AAA board also has wider input voltage range (380-520 V AC) for weak Arctic grid power. For Arctic drilling, Northern mines, and Antarctic research, the AAA is the only power supply that starts at -40 °C.

Key Technical Specifications

Quality Inspection Process (SOP Transparency)

Arctic liquid-cooled testing requires -40 °C cold soak, heater validation, and pump startup.

Incoming Verification: OEM packing slip. Visual inspection: heated fittings (insulated), pump (magnetic drive), heater (500 W, bolted to cooling plate), coolant reservoir (filled, sealed). The board has no external pump — pump is internal.

Arctic Cold Test (-40 °C): Soak board at -40 °C for 24 hours. Coolant freezes (60/40 glycol freezes at -50 °C — actually 60% glycol freezes at -60 °C, but at -40 °C it’s still liquid. Viscosity increases. Pump startup test). Apply power. Heater activates (thermostat). Pump starts (magnetic drive, high torque at cold). Coolant circulates. Board operates at 50% load (50 A) during warmup. After 30 minutes, coolant reaches 5 °C. Full load (100 A) applied.

Heater Test (-40 °C): Measure heater power (500 W ±10%). Thermostat cycles at 3 °C (on) and 5 °C (off). At -40 °C, heater runs continuously until coolant warms.

Pump Viscosity Test (-40 °C): Measure pump flow rate at -40 °C (cold, thick coolant). Must be >30 L/min (spec: 40 L/min at 25 °C). At -40 °C, 32 L/min — acceptable.

Thermal Test (55 °C Ambient, 100 A Load): Coolant at 25 °C (chiller). Board must operate at 100 A. Semiconductor temperature <85 °C.

Cold Cyclic Test (10 cycles): Cycle board from -40 °C to +25 °C ten times (8 hours each extreme, 4-hour ramp). Heater cycles. Pump runs. No leaks, no cracks, no heater failure.

Leak Test (Pressure, -40 °C): Pressurize coolant loop to 8 bar at -40 °C. No leaks (seals cold).

Field reliability note (from our RMAd board tracking): We sold 3 units of DS200LPPAG1AAA over 12 months. Zero field failures. 0% failure rate.

Field Replacement Pitfalls

Get these five right and you’ll cut rework time by 90%. Arctic liquid-cooled supplies have unique cold-weather requirements.

Coolant — 60/40 Propylene Glycol (Not Ethylene)
❗ Use 60% propylene glycol / 40% water (good to -50 °C). One site used ethylene glycol (toxic). Not allowed in food-grade areas. Another site used 30/70 (freezes at -15 °C). At -40 °C, the coolant froze. The cooling plate cracked. Use propylene glycol. The board has a label with coolant spec. Follow it.

Cold Start — 30 Minutes (Heater Must Warm Coolant)
At -40 °C, the heater takes 30 minutes to warm the coolant to 5 °C. One site powered the board and applied full load (100 A) immediately. The cold coolant couldn’t remove heat. The board overheated (shutdown). Wait 30 minutes. The board logs “Coolant Warming” status. Use the status bit to enable load.

Pump — Magnetic Drive (Sealless, Runs Dry — Don’t)
The pump is magnetic drive (sealless, no leaks). It can run dry for short periods (30 seconds). One site ran the pump dry for 10 minutes (coolant leaked out earlier). The pump bearings overheated. Pump seized. Check coolant level before startup.

Heater Thermostat — Do Not Bypass (Coolant Will Freeze)
The heater thermostat cycles at 3-5 °C. One site bypassed the thermostat to keep coolant warmer (always on). At -40 °C, the heater ran continuously (500 W). The board’s input power increased by 500 W. The upstream breaker tripped. Don’t bypass the thermostat. The board is designed for 500 W heater load.

Condensation — Sealed Enclosure, But Desiccant Required
The IP65 enclosure seals out moisture, but internal humidity can condense on cold surfaces (cooling plate at -40 °C during startup). One site had condensation inside the enclosure. Water dripped on electronics. Add desiccant packs (included). Replace every 2 years.

New Original vs. Refurbished: Why It Matters

Arctic liquid-cooled supplies have heaters and pumps that wear. Refurbished boards may have degraded pump bearings.

What “New Original (New Surplus)” means on this model:
GE manufactured the LPPAG1AAA in very limited quantities. Our stock comes from an Arctic drilling operator’s overstock — original GE cartons, board never used. The heater has zero cycles. The pump has zero hours. The coolant is fresh.

Refurbished risk in plain terms:
One refurbished AAA board we tested had a worn pump (bearing noise). At -40 °C, the pump failed to start (frozen bearing). Another refurbished board had a heater that didn’t work (open circuit). The coolant froze at -30 °C. The cooling plate cracked.

Real cost of a refurbished failure:
A frozen cooling plate at an Arctic drilling site cracks. Coolant leaks onto live electronics. Short circuit. Fire risk. A refurbished AAA board sells for 6,000-9,000 online. Our new surplus price is 15,000. The difference is $6,000-9,000. The cost of a fire in an Arctic drilling module is not measurable.

What we provide as proof:

• Original GE carton
• Arctic cold test (-40 °C, 24-hour soak, heater validation)
• Pump flow test (40 L/min at 25 °C, >30 L/min at -40 °C)
• Heater power measurement (500 W ±10%)
• Leak test (8 bar at -40 °C)
• Thermal test (55 °C ambient, 100 A load)
• 12-month warranty (heater and pump included)

Our price sits roughly 30% below GE’s last list price ($21,500) and about 100% above typical refurbished listings. The delta pays for Arctic testing, pump validation, heater warranty, and certification.

Performance Benchmarks & Test Results

Test environment: Arctic chamber (-40 °C to +55 °C), 60/40 propylene glycol coolant, 480 V AC 3-phase.

Cold start (-40 °C): Heater on for 28 minutes. Coolant reaches 5 °C at 28 minutes. Pump flow: 33 L/min. Board operates at 100 A load after warmup.

Coolant freeze point (60/40 propylene glycol): -55 °C (tested). At -50 °C, still liquid.

Pump flow rate (25 °C, 60/40 glycol): 42 L/min. At -40 °C (before warmup): 32 L/min. At -40 °C (after warmup to 5 °C): 38 L/min.

Heater power: 495 W at 480 V. Thermostat cycles at 3.5 °C (on) and 5.2 °C (off).

Semiconductor temperature (55 °C ambient, 100 A load, coolant 25 °C): 78 °C.

Semiconductor temperature (-40 °C ambient, 100 A load, coolant 5 °C): 55 °C (cold helps).

Efficiency (100 A load, -40 °C ambient): 91.5% (cold). At 55 °C ambient: 92.5%.

Cold cyclic test (10 cycles, -40 °C to +25 °C): No leaks, no cracks, heater cycles 10 times, pump starts each time.

Field reliability note (from our RMAd board tracking): 3 units sold, 0 failures. Refurbished boards: tested 1 unit (only one found), had worn pump (failed at -40 °C), 0 passed. 0% acceptable. Arctic liquid-cooled supplies are rare. Buy new surplus only.

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