Bender b93015510 Voltage Relay

The Bender SUA145 voltage relay (ordering code B93015510) is an undervoltage/overvoltage monitor for single‑phase AC or DC systems that operates without an external supply voltage. Five device variants provide adjustable thresholds via potentiometers, with measuring ranges including 10–30 V (35 V max permissible), 20–60 V, 50–150 V, and 120–300 V, while the measuring circuit accepts DC and 40–400 Hz signals. Power consumption is ≤ 3.5 VA, and the unit offers a rated insulation voltage of 320 V AC with protective separation between the supply and measuring circuits; it also features an integrated energy backup and a compact 45 mm enclosure. The alarm relay has two potential-free changeover contacts, and status indicators include a Power On LED and an Alarm LED. Typical applications include voltage monitoring of motor power supplies, standby and emergency power monitoring, and earth-fault monitoring in medium‑voltage installations via voltage transformers.