REVERSE POWER
PROTECTOR TRIP RELAYS
Key Features
- LED fault indication
- Adjustable nominal voltages, trip points, time delay and differentials
- Compact DIN-rail enclosure
- Power on LED (Green)
- Designed to avoid nuisance tripping
TE Connectivity’s (TE) Crompton Instruments Reverse Power is a protector trip relay that monitors single- or three-phase supplies for reverse power and trips when detecting reverse power (I x cos ø) over a set limit.
The Reverse Power trip relay provides continuous surveillance of AC generators against motoring. Reverse power relays are used to detect the failure of the prime mover (engine) when active energy (Watts) flows into the generator causing rotation - the set will operate like an electric motor which can cause significant mechanical damage. This relay offers an adjustable reverse power set between 2% and 20% of the nominal power and time delay adjustment range of 0 to 20 seconds.
The protector relay estimates the power level in the system by measuring current and power factor but does not actually measure the system voltage. When the reverse power level exceeds the set point, and after the time delay has elapsed, the relay will energize, and the red LED will illuminate to indicate the trip condition. The relay will automatically reset once the power level falls below the set point minus the fixed differential of 1% causing the LED to extinguish and the relay to de-energize.
Specifications
| Brand | Crompton |
| Series | Protector |
| Model | PAT |
| Input Range | 3P3W 380-480V L-L |
| Input Frequency | 50Hz, 60Hz |
| Tariff Code | 8536.49.0099 |
| ECCN | EAR99 |