Overview
Technical Specifications
| Parameter | Specification |
|---|---|
| Model | 3300/53-03-02-00-40-20-00-00-00 |
| Brand | Bently Nevada |
| Product Type | Overspeed Protection System |
| Base Model | 3300/53 |
| Monitoring Channels | 3 independent channels |
| Transducer Compatibility | Proximitor sensors or magnetic pickups |
| Speed Range | Reported as configurable up to 30,000 rpm |
| Voting Logic | Reported as 2-out-of-3 voting |
| Relay Outputs | Overspeed trip relays and channel status relays |
| Recorder Outputs | Proportional analog outputs |
| Operating Temperature | 0 deg C to +65 deg C |
| Storage Temperature | -40 deg C to +85 deg C |
| Relative Humidity | Up to 95%, non-condensing |
| System Integration | 3300 monitoring rack framework |
Operating Principle and Trip Function
The system evaluates speed signals from its configured transducers to identify overspeed conditions. In a three-channel arrangement using 2-out-of-3 voting, the trip decision depends on the configured voting logic and channel status. This arrangement can reduce the risk of a spurious trip caused by a single channel, but the actual protection behavior must be verified against the installed configuration.
Signal and Output Configuration
Transducer selection affects signal conditioning and speed measurement. Proximitor sensors and magnetic pickups use different signal characteristics, so confirm the input requirements before connecting field devices. The relay outputs, channel status indications, and recorder outputs must also match the installed option set and the receiving trip or monitoring circuits.
Frequently Asked Questions
Q: Can this system use both Proximitor sensors and magnetic pickups?
A: The supplied description lists both sensor types. Confirm the specific input configuration and electrical requirements for the complete model number before selecting or replacing a transducer.
Q: Does the 3300/53 configuration use 2-out-of-3 voting?
A: The supplied description identifies a three-channel, 2-out-of-3 arrangement. Verify the actual voting logic and relay behavior against the manufacturer’s documentation for this exact configuration before using it in a machinery trip circuit.
Q: What should be checked before replacing an existing unit?
A: Match the complete part number, transducer input requirements, speed range, relay configuration, and rack or backplane arrangement. Do not assume that a unit with the same base model has identical protection settings or output options.
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