Carlo Gavazzi – EFAC230 (EFA C 230) – DIN‑Rail Frequency Monitor Relay

The Carlo Gavazzi EFAC230 (EFA C 230) is a DIN‑rail mounted frequency monitoring relay with microprocessor-controlled measurement designed to protect power systems. It provides adjustable upper and lower frequency limits with independent time delays, and signals status through dual SPDT relays—ideal for generators, UPS systems, and industrial power protection.

Key Features & Specifications:

• Model / MPN: EFAC230 (also labelled EFA C 230)  

• Function: Monitors 50/60 Hz AC supply; triggers relays if frequency exits adjustable limits  

• Settings: Separate adjustable upper/lower limits and two time delays (0.1–30 s) to prevent nuisance trips  

• Bandwidth Options: Selectable from 0.5 Hz to 10 Hz  

• Outputs: Two SPDT relay contacts, 5 A AC/DC each  

• Power Supply: Integrated supply via A1/A2; available for 230 VAC → model EFA C 230  

• Mounting: 45 mm Euronorm housing, DIN‑rail TS35/EN 50 022, IP20 enclosure  

• Indicators: Front LEDs show power, and upper/lower limit status (flashing during time delay)  

• Accuracy & Timing: ±0.01%/°C accuracy; ≤400 ms response; 40 ms power failure immunity  

• Operating Temp: –10 °C to +50 °C; storage –50 °C to +85 °C  

• Certifications: UL, CSA, IEC protection; dielectric 2 kVAC, impulse 4 kV; IP20  

• Weight: ~250 g