This document is the instruction manual for MAGNETIC FR and BR series tachometers. The series has 20V, 40V, and 60V voltage options and a 4-pole structure. Carbon silver and electric wood brushes are available.
This document provides technical data for Magnetic tachogenerators and centrifugal relays. It describes two main series of tachogenerators: the FR series with a traditional coupling flange and the BR series with a hollow shaft. Both series are available in various versions with different winding voltages (20V, 40V, 60V) and protection classes.
The document also details centrifugal relays, including the standalone RC2 model and integral versions (RC2F, RC2B) designed for specific tachogenerator types. Technical specifications cover electrical characteristics, mechanical dimensions, and operational limits.
| Rated Voltage at 1000 RPM | 20 V, 40 V, 60 V |
|---|---|
| Number of Poles | 4 |
| Protection Class (FR11) | IP44 |
| Protection Class (FRB11) | IP55 |
| Max Speed (11/2 Winding) | 7,500 RPM |
| Contact Capacity (RC2F) | 2A at 250Vac |
| Tripping Speed Range | 600 - 4300 RPM |
The tachogenerators can be supplied with three kinds of winding: 20 V, 40 V, and 60 V at 1000 RPM.
The FR series features a traditional coupling flange, while the BR series is designed with a hollow shaft for direct rigid coupling to the motor shaft.
The tripping speed for the RC2F relay is specified as 600 to 4300 RPM.