258B Series Elevator Power Monitors - ±0.1% Accuracy & Fast Fault Detection

258B Series | Elevator Power Monitors

The 258B Series power monitors continuously track three-phase power lines to detect phase loss, phase reversal, and under-/over-voltage conditions with high precision (±0.1% of setpoint) and a narrow deadband. Ideal for elevator traction, control, and safety circuits where rapid, accurate fault detection is critical.

Each monitor features an automatic reset design, adjustable response time (50 ms to 10 s), and a SPDT relay output rated for 10 A @ 240 VAC. Durable housings mount on RB08-PC surfaces or standard 8-pin sockets, operating reliably from –40 °F to 131 °F in 0–97% non-condensing environments.

• ±0.1% setpoint accuracy :contentReference[oaicite:4]{index=4}
• Deadband ≈ 2% adjustable :contentReference[oaicite:5]{index=5}
• Response time: 50 ms (adjustable up to 10 s) :contentReference[oaicite:6]{index=6}
• Relay rating: 10 A @ 240 VAC resistive :contentReference[oaicite:7]{index=7}
• Frequency: 60 Hz :contentReference[oaicite:8]{index=8}
• Automatic reset design :contentReference[oaicite:9]{index=9}
• Operating temperature: –40 °F to 131 °F; humidity 0–97% non-condensing :contentReference[oaicite:10]{index=10}

The 258B Series monitors deliver high-precision, code-compliant phase protection to ensure smooth elevator operation in demanding environments. Always confirm compatibility with your system’s voltage and mounting before installation.