CSDSC-VFD0 Johnson Controls Current Switch

Overview

The Johnson Controls CSDSC-VFD0 is a Variable Frequency Drive (VFD) Auto Current Switch designed to self-calibrate and reliably detect proof of current or flow on VFDs for fans and pumps. It automatically sets the correct threshold to eliminate false alarms caused by frequency variances, detecting motor under-current conditions such as belt loss, coupling shear, or mechanical failure without requiring manual sensor calibration.

Features

• Self-calibrating functionality eliminates the need for live calibration or sensor training
• Split-core clamp design allows installation without removing conductors, increasing safety and reducing labor costs
• Self-powered mechanism induces operational power directly from the monitored line
• Large 0.75-inch aperture accommodates oversize conductors
• Includes an iris and detachable base for flexible screw or DIN rail mounting options

Specifications

• Amperage Range: 1 A to 135 A
• Minimum Turn-On Amps: 1 A at 30 Hz, 1.5 A at 20 Hz, 2.5 A at 10 Hz
• Output Type: Switch Normally Open (N.O.)
• Switch Load Capacity: 1.0 A at 30 VAC/VDC
• Frequency Range: 50/60 Hz
• Isolation Voltage: 600 VAC rms (UL), 300 VAC rms (CE)
• Temperature Range: 5 to 140°F (-15 to 60°C)
• Humidity Range: 0 to 95% noncondensing

Applications

• Monitoring proof of current and flow on variable frequency drive (VFD) and constant volume motors
• Verification of equipment operation for commercial HVAC fans, blowers, and pumps
• Non-intrusive status monitoring for heating coils and lighting loads