DS3828BH3A 125VDC | GE Power Supply | New Original

Description

Product Introduction

The GE DS3828BH3A is a power supply module for the Speedtronic Mark V turbine control system, providing regulated DC power distribution for the chassis backplane and field devices. This board mounts directly into the Mark V rack, converting nominal 125 VDC plant battery power into isolated, regulated DC voltages required by CPU, I/O, and communication modules.

The “BH3A” designation indicates a power distribution module with the “3A” revision level. This board provides +5 VDC for logic circuits, ±15 VDC for analog circuits, and additional isolated outputs for field devices. It includes input surge protection, output short-circuit protection, and thermal monitoring. The DS3828BH3A is a critical component in the Mark V chassis, providing stable, noise-free power to all rack-mounted modules. It is commonly used in turbine control systems for gas and steam turbines, providing the backbone power distribution for the entire control system.

Key Technical Specifications

Key Selling Points & Differentiators

• Complete chassis power solution. Provides all required voltages for Mark V modules—+5V logic, ±15V analog, and +24V field power—in a single slot.
• High output capacity. 100W total capacity with +5V rated at 10A, sufficient for fully populated Mark V chassis configurations.
• Overload protection. Individual current limiting on each output with auto-recovery, eliminating nuisance fuse changes.
• Input transient protection. Built-in MOV suppresses voltage spikes from the plant DC bus, protecting downstream modules.
• Thermal monitoring. Overtemperature shutdown prevents damage from excessive cabinet heat or airflow failure.
• Redundant operation capable. Multiple BH3A modules can be paralleled for N+1 redundancy if your chassis configuration supports it.
• 48-hour burn-in with output testing. Every unit is tested at full load for 48 hours, with output voltages monitored for drift and ripple.
• 18-month warranty covering output regulation and protection circuits. If the board fails to maintain output voltages or protection circuits malfunction, we replace it.

Frequently Asked Questions (FAQ)

Q: What is the difference between the DS3828BH3A and the DS3820PSLB?

A: The DS3828BH3A is a chassis power distribution module with higher output capacity (100W) and multiple outputs (+5V, ±15V, +24V field). The DS3820PSLB is a power conversion board (50W) with only +5V, +15V, and -15V outputs, focused on powering the CPU and I/O modules. The BH3A is typically used in larger Mark V configurations where additional field power is required.

Q: Can I use multiple DS3828BH3A modules in the same chassis?

A: Yes—the BH3A can be paralleled for N+1 redundancy if your chassis configuration supports it. Each board will share the load evenly. However, you must check the chassis backplane design and power distribution—some Mark V configurations are not designed for redundant power supply operation. Consult your Mark V system documentation before installing multiple BH3A modules.

Q: What happens if the board overheats?

A: The BH3A has an overtemperature shutdown circuit that activates at approximately 85°C. If the board exceeds this temperature, it will shut down all outputs to prevent damage. When the board cools below 70°C, it will automatically restart. The red LED on the front panel indicates a thermal fault.

Q: Does the BH3A require forced-air cooling?

A: Yes—the BH3A is rated for operation with forced-air cooling (200 LFM minimum) as provided by the Mark V cabinet’s fan system. Operating the board without adequate airflow can cause overtemperature shutdown and reduced service life.

Q: Can the BH3A handle input voltage fluctuations?

A: Yes—the BH3A is rated for 100-140 VDC input (nominal 125V). It includes MOV surge suppression to protect against voltage spikes. If input voltage drops below 100V, the board’s undervoltage lockout will engage, shutting down outputs. It will auto-restart when voltage recovers.

Q: Does the BH3A have short-circuit protection on the outputs?

A: Yes—each output has current-limiting protection. If a short circuit occurs, the output current will be limited to a safe value, and the board will auto-recover when the short is removed.

Q: What is the warranty on the BH3A?

A: 18 months from shipment, covering output regulation, protection circuits, and component reliability. If the board fails to maintain output voltages or protection circuits malfunction, we replace it. The warranty does not cover physical damage or miswiring.

Q: Do you have many BH3A boards in stock?

A: We typically have 4-6 units of the DS3828BH3A in stock. If you need larger quantities, contact us directly to confirm availability. This board is a critical component for many Mark V chassis configurations.

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