Features:
- Spare-module identity: 81546-01 is listed as the dual-hermetic relay module for the 3300/45 monitor.
- Alarm contacts: The documented installation provides Alert and Danger relay contact sets.
- Configurable operation: Plug-in jumpers support normally energized or de-energized relay modes.
For a 3300/45 spare request, 81546-01 identifies the relay module rather than the full differential-expansion monitor.
The monitor's rear wiring diagram shows NC, ARM and NO connections for the Alert and Danger circuits, giving maintenance teams a concrete way to compare the installed alarm wiring.
The existing monitor and jumper arrangement are useful matching details when arranging a replacement module for the rack.
Apter Power can support an 81546-01 Bently Nevada Dual Hermetic Relay Module enquiry with a scoped quotation and relevant 3300/45 technical documentation.
Bently Nevada 81546-01 Dual Hermetic Relay Module Manuals,Datasheets,Link
Important Notice: Other accessories, manuals, cables, calibration data, software, etc. are not included with this equipment unless listed in the above stock item description. All prices are shown in USD.
- Listed spare: 81546-01 is the dual-hermetic relay module in the 3300/45 spare-parts list.
- Monitor relationship: The module belongs behind a 3300/45 monitor; it is not the complete monitor.
- Alarm function: The documented arrangement uses separate Alert and Danger relay contacts.
- Option distinction: The 3300/45 ordering table distinguishes the hermetic relay option from epoxy, no-relay and quad-relay versions.
- Contact sets: The 3300/45 diagram shows NC, ARM and NO terminals for Alert and Danger.
- Relay mode: Plug-in jumper choices include normally energized and normally de-energized alarm relays.
- Voting choice: The document lists OR and AND danger-relay voting options for the monitor arrangement.
- System boundary: Alarm setpoints and recorder outputs are monitor functions, not independent specifications of 81546-01.
- Dual hermetic: 81546-01 is the listed spare when dual hermetically sealed relays are required.
- No-relay contrast: 81544-01 is the separate no-relay spare and does not offer the same alarm contacts.
- Epoxy contrast: 81545-01 is the distinct dual-epoxy spare rather than the hermetic option.
- Quad contrast: 84152-01 is the separate quad-relay spare; it is not an alias for 81546-01.
- Differential expansion: In a 3300/45 installation, the monitor follows rotor-to-casing axial displacement.
- Startup supervision: The documented measurement is relevant to thermal expansion during startup and shutdown.
- Alert output: The module provides the relay path for the configured Alert alarm circuit.
- Danger output: The second contact set supports the configured Danger alarm circuit.