Fanox C9 Basic Motor Protection Relay – 3-Phase LV Motors 1.5–4 kW
Fanox C Series Multiple Configurations

Fanox C9 Basic Motor Protection Relay – 3-Phase LV Motors 1.5–4 kW

SKU C9_MOTOR_PROTECTION_RELAY
Fanox C9 basic motor protection relay for 3-phase LV motors up to 9.3A. Thermal image memory, instant phase loss detection at reduced load, visual trip cause indication. Auxiliary voltage 24V / 115V / 230V. DIN rail mount.
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Fanox C9 — Basic Motor Protection Relay

The Fanox C9 is a compact, DIN rail-mounted motor protection relay designed for 3-phase low-voltage motors in the 1.5–4 kW (2–5.5 hp) range. Manufactured by Fanox since 1992, the C9 combines precise thermal image simulation with instant phase loss detection — protecting motors against the most common causes of premature winding failure.

Key Protection Functions

  • Thermal image memory — continuously models motor heating and cooling cycles including start-up, overloads, and rest periods; retains memory during power outages
  • Phase loss protection — detects phase loss even at reduced load (below 30% FLA) when conventional bimetallic relays fail to trip
  • Phase imbalance protection — trips when imbalance exceeds 40%
  • Phase sequence protection — prevents reverse rotation damage
  • Trip class selection — Class 10, 20, and 30 per IEC 947-4-1

Trip Cause Indication

LED indicators on the relay front panel identify the specific trip cause instantly — overload, phase loss, or phase imbalance — eliminating guesswork and reducing downtime during fault investigation.

Specifications

  • Current range: 3–9.3A (adjustable)
  • Motor range: 1.5–4 kW / 2–5.5 hp (400V, 460V)
  • Voltage range: Up to 1,000 Vac
  • Auxiliary voltage: 24V DC / 115V AC / 230V AC
  • Output: 1 NO + 1 NC contact, 250V AC max, 5A thermal
  • Mounting: DIN rail (35mm)
  • CE Certified | 3-year warranty

Typical Applications

Motor Control Centers (MCC), control panels, pumps, compressors, fans, conveyor systems, and HVAC equipment in industrial and commercial facilities.