Application Scenarios
A large petrochemical complex operating critical turbomachinery in a high-voltage DC-powered substation faced a serious challenge: the 3500 monitoring racks protecting their main compressor trains were approaching end-of-life on the power input modules, and the plant could not tolerate an outage to replace them. The maintenance team discovered that the 115M7750-01 supports hot-swappable replacement in dual-redundant power configurations. During a routine inspection window, technicians safely replaced the aging PIM in each rack while the second power supply maintained full system operation. The 115M7750-01’s fuse protection had already prevented downstream damage from a voltage transient event months earlier, and its under-voltage tolerance ensured the rack rode through brief DC bus sags without tripping. By standardizing on the 115M7750-01 as a spare, the facility eliminated the risk of unplanned shutdowns from power module failures across its entire machinery protection infrastructure.
Parameter
| Main Parameters | Value/Description |
|---|---|
| Product Model | 115M7750-01 |
| Manufacturer | Bently Nevada (Baker Hughes) |
| Product Category | High Voltage DC Power Input Module (PIM) |
| System Compatibility | 3500/15 Power Supply System / 3500 Series Machinery Protection Rack |
| Input Voltage Range | 88 to 140 Vdc (High Voltage DC) |
| Maximum Input Current | 2.5 A (full rack draw) |
| Module Form | Half-height rear-mount module |
| Installation Position | Behind front-facing 3500/15 power supply module |
| Over-Voltage Protection | Internal fuse (part 129M0198) opens on over-voltage |
| Under-Voltage Behavior | No damage to PIM or power supply |
| Redundancy Support | 1+1 redundant configuration, hot-swappable |
| Operating Temperature | -30°C to +65°C |
| Storage Temperature | -40°C to +85°C |
| Humidity | 95%, non-condensing |
| Dimensions (H × W × D) | 120.7 × 25.4 × 114.3 mm |
| Weight | 0.34 kg (0.75 lb) |
