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Product Description
The Bently Nevada 3500/53 Electronic Overspeed Detection System (133388-01) is a high-performance protection module designed for the 3500 Machinery Protection System rack. It continuously monitors rotating shaft speed and provides reliable, independent overspeed protection for critical rotating equipment such as steam turbines, gas turbines, compressors, and expanders.
As a 2-slot-wide module, the 3500/53 accepts input from up to two magnetic pickups (MPU) or proximity probe signals, processes the speed data using advanced detection algorithms, and activates alarm outputs and relay action when speed exceeds configured trip setpoints — helping prevent catastrophic equipment failure and costly downtime.
Key Features
- Independent overspeed protection — operates separately from the primary monitoring system for maximum safety integrity
- Dual-channel speed input — supports 2 speed probes per module
- Triple Modular Redundant (TMR) capable — supports 2-out-of-3 voting logic when used in redundant configurations
- Fast response time — trip response within milliseconds to protect against rotor overspeed events
- Programmable alarm setpoints — user-configurable thresholds and time delays
- Front panel LED indicators — real-time status for OK, Alarm, and Trip conditions
- Hot-swappable design — module replacement without shutting down the rack (with proper rack power consideration)
- Seamless integration — fully compatible with 3500 racks, 3500/92 communication gateways, and System 1® software
Technical Specifications
| Parameter | Specification |
|---|---|
| Part Number | 133388-01 |
| Model | 3500/53 Electronic Overspeed Detection System |
| Module Width | 2 full-size slots |
| Speed Inputs | 2 channels |
| Input Signal Types | Magnetic pickup (MPU), proximity probe, keyphasor® |
| Speed Measurement Range | Up to 20,000 rpm (configuration dependent) |
| Accuracy | ±0.15% of speed reading |
| Relay Outputs | Supports 3500/34 relay module integration |
| Power Consumption | Typically 7.4 Watts |
| Operating Temperature | –30°C to +65°C (–22°F to +149°F) |
| Storage Temperature | –40°C to +85°C |
| Relative Humidity | 5% to 95%, non-condensing |
| Approval / Compliance | CE, ATEX / CSA certified options available |
| Mounting | 3500 series rack (19-inch EIA standard) |
⚠️ *Specifications may vary by configuration. Contact our team to confirm the exact firmware and I/O module combination for your application.*
Applications
- Steam turbine overspeed protection in power generation plants
- Gas turbine and compressor train protection in LNG and petrochemical facilities
- Expanders and high-speed rotating machinery in refining operations
- Turbomachinery train shutdown systems requiring SIL-rated protection
- Retrofit and upgrade projects for legacy overspeed detection systems
Why Buy From Us?
- ✅ In stock — large inventory of 3500 series modules for same-day dispatch
- ✅ 12-month warranty on every module
- ✅ Tested & verified — each unit inspected before shipment
- ✅ Global shipping — DHL / FedEx / UPS express delivery
- ✅ Technical support — experienced engineers available for configuration guidance
- ✅ Competitive pricing — request a quote for bulk order discounts
3500/53 133388-01
Frequently Asked Questions (FAQ)
Q1: Is 133388-01 a genuine Bently Nevada module?
A: This part number corresponds to the Bently Nevada 3500/53 Electronic Overspeed Detection System. We supply modules that are fully tested and compatible with your existing 3500 rack. Please contact us for detailed condition and sourcing options.
Q2: Is the 3500/53 hot-swappable?
A: Yes. The module can be replaced while the rack is powered, provided proper procedures are followed to maintain system safety integrity.
Q3: Can the 3500/53 be used in a redundant configuration?
A: Yes. Multiple 3500/53 modules can be configured for Triple Modular Redundant (TMR) voting to achieve higher safety integrity levels for critical turbine applications.
Q4: How do I program the overspeed trip setpoints?
A: Setpoints are configured using the 3500 Rack Configuration Software via the rack interface module. Our technical team can assist with configuration support.
Q5: What is the lead time and warranty?
A: In-stock items typically ship within 24–48 hours. All modules come with a 12-month warranty.
BENTLY BRAND
| 125760-01 | 133396-01 | 3500/54M |
| 125768-01 | 133819-02 | 3500/60 163179-01 |
| 125800-01 | 135473-01 | 3500/61 |
| 125840-01 | 135613-01-00 | 3500/61-01-01 |
| 2300/20-00 | 3500/64M | 3500/62-03-00 |
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Supplies industrial spare parts covering well‑known international brands: ABB, GE, Bently Nevada, Emerson, Honeywell, Schneider, EPRO, Yokogawa, Woodward, Foxboro and Invensys TRICONEX.
We maintain ample stock, offer fast lead times and deliver products with stable, reliable quality.
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