UNKNOWN 61-300-052-504 H1 CURRENT TRANSFORMER

Description:

The UNKNOWN 61-300-052-504 H1 Current Transformer is used in industrial power monitoring and protection systems to step down high primary current to a safe secondary current ratio of 800:1 for metering and relay applications. Commonly installed in switchgear, motor control centers, power distribution panels, and industrial electrical systems requiring accurate current measurement and protection. Maintenance teams, OEMs, and system integrators use this transformer for repair, retrofit, expansion, or replacement of existing current sensing and metering devices. The part is also referenced as a Siemens current transformer in surplus and industrial inventory listings.

Applications:

The UNKNOWN 61-300-052-504 H1 Current Transformer is used in industrial applications requiring current measurement, power monitoring, and protective relaying. It is commonly found in switchgear assemblies, substations, motor control centers, electrical distribution systems, and heavy industrial facilities where high primary currents must be safely reduced for meters, relays, and monitoring equipment. Current transformers provide electrical isolation while maintaining measurement accuracy for industrial power systems.

Technical Specifications:

• Manufacturer: Unknown (commonly cross-referenced to Siemens)
• Part Number: 61-300-052-504
• Product Type: Current Transformer (CT)
• Function: Current sensing and isolation for metering and protection
• Primary Current Rating: 800 A
• Secondary Current Rating: 1 A
• Current Ratio: 800:1
• Terminal Marking: H1 Primary Terminal
• Construction Type: Donut / Window-Type Current Transformer
• Application: Power Monitoring and Protective Relaying
• Compatible Equipment: Switchgear, MCCs, Distribution Panels, Protective Relays
• Frequency: 50/60 Hz
• Mounting Type: Panel or Bus Bar Mount
• System Voltage: Up to 720 V maximum (typical CT rating)
• Test Voltage: 3 kV for 1 minute (typical industrial CT rating)
• Designed for Industrial Electrical Systems
• Suitable for Metering and Protection Applications
• Industrial Grade Construction for Continuous Operation

Common Replacements:

• Siemens 61-300-053-506 Current Transformer, 800:0.5 A
• ITI 8RL-801 Current Transformer, 800:5 A
• Hammond CT-800 Current Transformer, 800:5 A