Bently Nevada 3300/12 AC Power Supply

Product Overview

The 3300/12 converts AC mains power into regulated DC voltage for Bently Nevada 3300 monitoring systems. This power supply module delivers reliable energy to vibration monitors and associated instrumentation in the rack. Maintenance teams appreciate this module for its robust construction and straightforward installation process. The 3300/12 incorporates comprehensive protection features to safeguard connected equipment from power anomalies.

Key Specifications

Parameter	Specification
Model	3300/12
Input Voltage	115 V AC or 230 V AC (selectable)
Input Frequency	50–60 Hz
Input Power	75 VA (maximum)
Output Voltage	+24 V DC (single output)
Output Current	2.5 A (continuous)
Output Ripple	≤5 mV RMS
Load Regulation	±0.2%
Line Regulation	±0.1%
Efficiency	70% (typical)
Overvoltage Protection	Yes
Overcurrent Protection	Yes (auto-recovery)
Short-circuit Protection	Yes (current limit)
Isolation Voltage	2,500 V AC (input to output)
Operating Temperature	0°C to +55°C
Storage Temperature	-30°C to +75°C
Humidity Range	5% to 95% RH (non-condensing)
Cooling Method	Convection
Dimensions	280 mm × 112 mm × 45 mm
Weight	2.0 kg
Mounting	Panel or rack mount
Indicators	Power ON (green LED), Fault (red LED)
Terminal Type	Screw-type connectors

AC Input Versatility

The 3300/12 accepts either 115 V AC or 230 V AC input through a convenient selector switch. This dual-voltage capability allows the module to operate in different regional power environments seamlessly. The unit handles input frequencies from 50 to 60 Hz without performance degradation. A built-in EMI filter suppresses conducted noise from the AC mains line. Consequently, the 3300/12 delivers clean power unaffected by grid disturbances.

DC Output Specifications

This power supply provides a single regulated +24 V DC output for monitor system components. The module delivers up to 2.5 A of continuous current for powering multiple rack modules. Output voltage remains stable within ±0.2% under varying load conditions. The ripple voltage stays below 5 mV RMS for noise-sensitive vibration measurement circuits. The 3300/12 maintains tight line regulation of ±0.1% across the entire input voltage range.

Protection and Safety Mechanisms

The 3300/12 integrates comprehensive protection features for system safety and reliability. Overvoltage protection activates when output voltage exceeds safe operating limits. Overcurrent protection with auto-recovery prevents damage from excessive load conditions. Short-circuit protection uses current limiting to safeguard the power supply during fault events. An input fuse provides additional protection against catastrophic failures. Front-panel LED indicators display Power ON and Fault status clearly.

Electrical Isolation and Noise Immunity

The 3300/12 provides 2,500 V AC isolation between input and output circuits. This high isolation level ensures operator safety during installation and maintenance. The module also filters high-frequency noise from the AC input line effectively. This noise rejection prevents interference with sensitive vibration measurements. Consequently, monitoring systems receive clean power essential for accurate data acquisition.

Mechanical Design and Installation

The 3300/12 features a robust metal housing measuring 280 mm × 112 mm × 45 mm. This module weighs 2.0 kg and fits standard 19-inch racks or panel mount configurations. The convection cooling design eliminates fans and their associated maintenance. Screw-type terminals on the front panel facilitate easy wiring connections. Front-panel LEDs provide quick visual status checks for power and fault conditions.

Thermal Performance and Efficiency

The 3300/12 achieves typical efficiency of 70% under normal operating conditions. This power supply dissipates heat through natural convection without forced airflow requirements. The unit operates reliably within ambient temperatures from 0°C to 55°C. Storage temperatures from -30°C to 75°C do not compromise component integrity. Humidity tolerance from 5% to 95% RH ensures performance in diverse plant environments.

Compatibility with Monitoring Systems

The 3300/12 integrates seamlessly with all Bently Nevada 3300 series monitors and accessories. This power supply provides +24 V DC for the 3300/25 accelerometer monitor and other modules. The unit also supports the 3300/16 displacement monitor and 3300/20 velocity monitor. System designers can configure complete rack-based protection solutions with this reliable power source.

Installation and Operational Guidance

Mount the 3300/12 securely in a 19-inch rack or panel using the supplied hardware. Select the correct input voltage using the rear-panel switch before connecting AC power. Wire the AC mains to the input terminals with proper grounding and strain relief. Connect the +24 V output to the monitor rack’s power distribution bus. Confirm output voltage with a multimeter before powering connected modules. Monitor the LED indicators periodically to verify normal operation status.