Rotoguard
Lack of maintenance, operational knowledge or monitoring systems can cause catastrophic failures in large machines and with this in mind, our experts have designed a state of the art system which provides protection, operational information and ongoing monitoring, allowing detection of early signs of deterioration.
- ATEX certified Quartzelec's Rotoguard is a telemetry system designed for monitoring and protecting the rotor winding of synchronous machines
- Forms the basis for an ideal protection scheme for synchronous machine rotors
- Enables the true measurement of fault resistance from 100kΩ to 500Ω
- Not influenced by the DC field component of excitation
- Provides an early warning of deterioration of the rotor insulation, a continuous readout of the rotor earth leakage resistance and winding temperature
- Being separately powered, the system is active at all times
- Can detect detoriation in insulation resistance due to condensation
- Can detect insulation resistance during acceleration to speed
- Stores the last 24 hours of recorded data
| Display | 800x400 TFT touch screen colour display 'Modules Healthy' green indicator on the display will flash once every 4 seconds when communications are healthy |
| Outputs |
4-20mA loops: USB port to connect to a PC (Mini USB ‘B’, IP68) |
| Earth Fault Level | 0-100Ω, user adjustable (Default setting 5Ω) |
| Operation Time | 4 seconds maximum, (temperature averaged over 12 readings) |
| Max. field voltage | Continuous ± 600V DC Transient ± 1000V DC |
| Cable Types | Distance between machine mounted unit and Rotoguard Monitor: Power - Up to 100 metres: 2 core 2.5mm2 - Up to 300 metres: 2 core 4.0mm2 Signal - Up to 300 metres: Coax RG223/U |
| Output relay rating | 3 Amps maximum (250V AC) (resistive), 0.5 Amps maximum (50V DC) (resistive) |
| Input voltage | 100-240Vac, 50-60Hz, Input fuse: UL/IEC127 250 Vac S 3.15 A |
| Rack dimensions | 3U 19 inch rack |
| Certifications | Sira 03ATEX4219U | CSAE 22UKEX1420U | IECEx SIR 14.0005U (Ex ec mc IIC Gc) |
Can be retrofitted to most over hung exciters
Earth Leakage and Rotor voltage values are displayed
Addition of a shaft mounted current shunt displays Rotor Current and Rotor Winding temperature
Monitors for earth fault whilst machine is stationary and during run-up as well as during normal operation
No sliprings or brushes means reduced maintenance
Certified for hazardous area applications
Continuous stream of instantaneous readings updated every four seconds
Complete set of one-minute averages for the previous thirty-four hours
Download data for time history of rotor op. conditions to review in event of machine breakdown
4 isolated 4-20mA loops for remote display of voltage, current, temperature and leakage
Rotor Module is designed to accommodate a purpose built optional Encapsulated RC unit
A Shaft Mounted Current Shunt can be added allowing rotor current and rotor winding temperature to be displayed
Rotor Module is designed to accommodate a purpose built optional Encapsulated RC unit
A Rotor with an 80mm bore is available (ATEX/IECEx certified) allowing the Rotor to be installed over a shaft, which can be used to drive further end-of-shaft devices such as a fan or oil pump
A shunt summing module can be fitted allowing the readings from up to 3 shunts to be averaged
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