PHASE DETECTION RELAY APR-3

Description

The APR-3 Phase Detection Relay (also called a Phase Sequence / Phase Failure Relay) is an electrical protection device used in 3-phase systems to monitor correct phase sequence and detect phase loss or imbalance.

It is mainly used to protect motors, compressors, pumps, and industrial equipment from damage caused by incorrect power conditions.

Key Features

• Monitors correct 3-phase sequence (R-Y-B / L1-L2-L3)
• Detects phase failure (missing phase protection)
• Prevents reverse rotation of 3-phase motors
• Output relay changes state when a fault is detected
• LED indicators for power and fault status (model dependent)
• DIN rail or socket-mounted design (8-pin plug-in type)
• Fast response to abnormal phase conditions
• Compact industrial control panel design

Specifications

• Product Type: Phase Detection / Phase Sequence Relay
• Model: APR-3
• Function: Phase sequence, phase loss, reverse phase protection
• Rated Supply Voltage: AC 220V / 240V / 380V / 415V / 440V (variant dependent)
• Frequency: 50/60 Hz
• System Type: 3-phase, 3-wire
• Output Contact: SPDT relay (changeover contact)
• Contact Rating: approx. 10A at 250VAC (resistive load)
• Power Consumption: ~2 VA
• Operating Temperature: -10°C to +55°C
• Humidity: up to ~85% RH (non-condensing)
• Mounting: 8-pin plug-in base/socket type
• Weight: ~80–100 g