A2 Protection Relays
A2 protection relays are compliant to Enel specifications responding to all the requirements related to the protection and control of the systems constituting a typical primary cabin. Each model is equipped with a set of analog/digital inputs and outputs capable of fulfilling the functions required by the specific application:
- DV901: MV line protection and control relay
- DV905: MV translation protection and control relay
- DV907: MV bar cuts-out protection and control relay
- DV910: MV power factor correction protection and control relay
- DV913: Substation alerts command control relay
- DV917: HV lines protection relay
- DV920: HV transformer protection and control relay
- DV922: HV neutral forming transformer protection and control relay
- DV925: HV transformer protection and control relay
- DV926: Monitoring relay for Petersen coil
- DV928: Monitoring relay for isolated or compensated earthing systems
- DV933: HV/MV transformer voltage regulation relay
- DV945: HV lines control relay
- DV966: HV/MV primary substation neutral management relay
- DV971: Monitoring device for primary substation auxiliary services
Benefits
Each model of A2 protection relay is designed to protect a specific asset.
The hardware architecture allows a quick wiring connection.
Simple and intuitive interface
Technical Specifications
GENERAL RATINGS
| Supply voltage | 110 Vdc ±20% |
| Power consumption | -* |
VOLTAGE ANALOG CHANNELS
| Voltage channels | Till 3* |
| Inputs voltage level | 0 - 100 Vac / 0 - (100/√3) Vac |
| Operating frequency | 47,5 - 52,5 Hz |
CURRENT ANALOG CHANNELS
| Current channels | Till 4* |
| Inputs current level | 1 A / 5 A |
| Operating frequency | 47,5 - 52,5 Hz |
PROTECTION FUNCTIONS* (ANSI/IEEE)
| 50/51 (Overcurrent) |
| 50N/51N (earth overcurrent) |
| 67/67N (phase/earth directional) |
| 59/59N (Overvoltage/ Neutral Overvoltage) |
| 79 (auto reclosing) |
| 25 (syncro-check) |
| 50BF (Breaker failure) |
| 2ndH REST (inrush current) |
* According to the specific model