Product Introduction
The Bently Nevada 128275-01 is a High‑Voltage AC Power Supply Module for the 3500 Series machinery protection system. It is specifically designed as a 3500/15 series power supply that converts AC line voltage (typically 110–220 VAC) into regulated DC power required by the 3500 rack backplane and all installed monitor modules. This module is a full‑height unit that occupies the dedicated power supply slots (leftmost two slots) in a 3500 rack. It can be used in single or redundant (dual) configurations to ensure high availability. The 128275-01 variant is rated for continuous operation in industrial environments and includes overvoltage, overcurrent, and short‑circuit protection.
Parameters
| Parameter | Specification |
|---|---|
| Model / Part Number | 128275-01 |
| Product Type | High‑Voltage AC Power Supply (3500/15 series) |
| Input Voltage | 85 to 264 VAC (nominal 110–220 VAC) |
| Input Frequency | 47 to 63 Hz |
| Output Voltage | +24 VDC (regulated) |
| Output Power | 350 W (continuous) |
| Efficiency | > 85% |
| Rack Compatibility | 3500 Series (occupies 1 full‑height slot per supply) |
| Redundancy | Supports dual redundant configuration (hot‑swappable) |
| Protection Features | Overvoltage, overcurrent, short‑circuit, overtemperature |
| Dimensions (W × H × D) | 24.9 × 241.3 × 218.4 mm (0.98 × 9.50 × 8.60 in) |
| Weight | 1.2 kg (2.65 lbs) |
| Operating Temperature | 0 to +65 °C (32 to +149 °F) |
| Storage Temperature | –40 to +85 °C (–40 to +185 °F) |
| Humidity | 5% to 95% non‑condensing |
| Cooling | Convection (no internal fan) |
| Certification | CSA, ATEX, IECEx (for safe area installation) |
Application Scenarios
Main Power for 3500 Racks – Installed in the leftmost slot(s) of a 3500 Series rack to provide regulated +24 VDC to all monitor modules (e.g., 3500/42, 3500/32, 3500/25), ensuring continuous machinery protection.
Redundant Power Configuration – Two 128275-01 modules can be installed in parallel in the same rack. If one fails, the other automatically supplies full power, guaranteeing uninterrupted operation for critical turbines, compressors, and generators in power plants or refineries.
Retrofit and Replacement – Directly replaces older or failed 3500/15 power supplies in existing 3500 racks, restoring system integrity with modern reliability.
Global AC Voltage Compatibility – With wide input range (85–264 VAC), the module can be deployed anywhere without voltage selection switches, simplifying international projects.
High‑Availability Machinery Protection Systems – Used in offshore platforms, nuclear power plants, and large petrochemical facilities where power redundancy is mandatory to prevent unplanned shutdowns.
Global direct procurement guarantee
All products are purchased directly from overseas original manufacturers or authorized channels, 100% guaranteed genuine quality, sufficient spot inventory, and comprehensive model coverage
Quality Commitment
Each product has been tested by our technicians, providing 12-month long warranty, worry-free after-sales
Flexible procurement plan
- Bulk order enjoys Friendship discount (2 pieces or more can be applied)
- Long-term cooperative customers can apply for priority supply
Full service support
7×24 hours technical consultation, from selection guidance to installation and commissioning to provide full life cycle service (paid)
Why do so many customers choose us?
On the basis of the same quality, we provide:
- More competitive price system
- Faster logistics response
- More complete technical support (free product technical documentation)
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