Vintage Servodan HPFI residual current relay, 40 A / 30 mA, 4‑pole module made in West Germany, removed in working condition. This device is intended for earth‑leakage protection (fejlstrømsrelæ) in older 230/400 V installations; it is sold primarily as a spare or collector/retro panel part.
Brand: Servodan.
Type: HPFI residual current relay / RCD module (fejlstrømsrelæ).
Rated current In: 40 A (label “40”).
Rated residual operating current IΔn: 0.03 A (30 mA, label “0.03”).
Poles: 4‑pole (terminal markings 1–8 on top and bottom).
Nominal system voltage: 230/400 V AC class (see schematic and markings on front).
Frequency: 50 Hz (per typical Servodan HPFI design – see label).
Connection: screw terminals top and bottom; schematic for 4‑wire 3‑phase + N on side label.
Country of manufacture: Made in West Germany (top sticker).
Mounting: DIN‑rail / panel clip on rear.
Used, removed from an older distribution board in working condition.
Heavy cosmetic wear: dirt, discoloration, minor paint spots and general age‑related marks on housing and label.
Several cut black leads remain connected; screws and terminals show normal oxidation and dust.
No obvious cracks or broken plastic housing; front rotary reset/test knob turns, but full function is not re‑verified.
This is an older HPFI relay intended for legacy installations; buyer should evaluate against current standards and may prefer it for repair of existing Servodan‑based boards.
