IS200VPWRH1A | GE Mark VIe VPWR Board | In Stock

Description

Product Introduction

The GE IS200VPWRH1A is a VMEbus power supply board from the Mark VIe Speedtronic series, purpose-built to provide regulated DC power to the backplane and associated modules in turbine control cabinets. This board converts the plant’s nominal 125 VDC bus (typically from battery-backed DC supplies) into the clean, regulated voltages required by VPRO processor boards, I/O modules, and communication interfaces.

What sets the H1A revision apart is its robust input filtering, wide input voltage tolerance (100–150 VDC), and thermal derating characteristics that ensure reliable operation even with fluctuating plant DC buses. The board delivers 5 VDC at up to 15 A for logic circuits and 24 VDC at up to 2 A for field I/O loop power—all with less than 50 mV ripple under full load. For system integrators maintaining or upgrading Mark VIe cabinets, this board is the direct OEM power solution—no third-party converters or custom wiring required.

Key Technical Specifications

Key Selling Points & Differentiators

• Direct OEM Replacement: Matches Mark VIe backplane pinout exactly. No wiring modifications—plug and play.
• Wide Input Range: Accepts 100–150 VDC, covering typical plant battery voltages and fluctuations without output dropout.
• Comprehensive Protection: Foldback current limiting, overvoltage clamping, and thermal shutdown protect downstream modules from supply faults.
• Low Ripple Output: <50 mV peak-to-peak ensures stable operation of sensitive processor and analog I/O boards—critical for turbine protection functions that rely on clean power.
• Live Test Verified: Every board undergoes a 48-hour burn-in at full rated load (15 A on 5 V rail, 2 A on 24 V rail) with cycling input voltage from 100 V to 150 V. We log output voltages, ripple, and thermal performance.
• 90-Day Warranty: Covers functional defects. If it fails under normal operating conditions, we replace it. No restocking fee for verified returns.
• OEM Traceability: All units come from audited surplus channels with original GE anti-static bags and serialized labels. No clones, no refurbished units with unknown repair history.
• Pre-Shipment Capacitor Reform: For units stored more than 12 months, we perform a controlled capacitor reforming procedure to prevent inrush failures—a common issue with long-shelf-life power supplies.

Frequently Asked Questions (FAQ)

Q: What is the difference between IS200VPWRH1A and earlier VPWR variants?

A: The H1A is the base revision with standard component ratings. Earlier variants (e.g., H0A) used older MOSFETs and capacitors with lower ripple current ratings. The H1A has improved input filtering and slightly better efficiency (82% vs. 78%). Functionally they are interchangeable as long as your backplane load is within spec. If you’re replacing an older board, the H1A is a direct drop-in.

Q: Can I use this board with 24 VDC or 48 VDC input instead of 125 VDC?

A: No. The IS200VPWRH1A is specifically designed for 125 VDC nominal input. Using lower voltages will not produce the required outputs—the converter needs at least 90 VDC to regulate properly. Using higher voltages (above 150 VDC) will damage the input stage. If your plant uses a different DC bus voltage, you’ll need a different VPWR variant or an external DC-DC converter upstream.

Q: The board has a front panel terminal block—what is that for?

A: The terminal block provides connections for the 24 VDC output (field loop power) and its return. The 5 VDC output is delivered exclusively through the VME backplane P1/P2 connectors—no external wiring needed. The terminal block also has a remote sense input for the 24 V rail to compensate for voltage drop on long field cables. We recommend connecting the sense lines close to the load for best regulation.

Q: Is this board hot-swappable?

A: No. The Mark VIe backplane does not support live insertion of power boards. You must de-energize the entire rack, wait for all LEDs to extinguish, and discharge the input bus capacitors (use a resistor, not a short). We’ve seen technicians try to pull a VPWR with the rack still powered—it arced across the backplane pins and took out neighboring boards. Don’t risk it.

Q: How do I know if my existing VPWR is failing?

A: Common signs include: flickering or dim LEDs on other boards, intermittent communication errors on I/O modules, unexplained resets of the VPRO processor, or measured 5 V rail dropping below 4.85 V under load. We recommend periodic measurement of the 5 V rail at the backplane test points—anything below 4.90 V at nominal load indicates the supply is aging (capacitor ESR increase) and should be replaced proactively.

Q: What is the typical lifespan of this board in continuous operation?

A: In our experience, the VPWR H1A has a mean time between failures (MTBF) of approximately 50,000 hours at 40°C ambient. The primary wear components are the electrolytic capacitors on the input and output stages—they dry out over time, especially in high-temperature cabinets. For installations in cabinets above 45°C, we recommend replacement at 40,000 hours. We can provide capacitor date code analysis for your specific unit upon request.

Q: What is the typical lead time for this part?

A: We stock these on the shelf—usually ship within 24 hours of order placement and payment confirmation. For international orders, add 3–5 days for customs. If you need expedited (overnight air), we can do that, but you’ll need to coordinate with our logistics team for the cut-off time.

Q: Does this board work with both Mark VIe and Mark VIeS (SIL-rated) cabinets?

A: Yes—with a caveat. The IS200VPWRH1A provides the same voltages for both standard and SIL-rated cabinets. However, SIL systems typically require redundant power supplies (two VPWR boards in parallel with diode isolation). The H1A can be used in those configurations, but you must ensure your backplane supports the OR-ing diodes. If your SIL system uses IS220VPWR variants, check the diode configuration first—some SIL racks use different OR-ing schemes. We can help you verify compatibility if you send us your cabinet model.

Q: What’s your return policy if this doesn’t fix my power-related fault?

A: If the board is electrically functional (passes our QC test) but doesn’t clear your fault, we’ll accept a return within 30 days provided the board shows no physical damage, no blown fuses, and no signs of overvoltage stress. We do charge a 15% restocking fee if the fault was due to a downstream short circuit or incorrect input voltage. We’ll work with you over the phone to diagnose the issue before we ship—our goal is to get you running, not to ship boxes back and forth.

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