37033

Overview

The Simpson Electric 37033 is a split-core current transformer designed for non-invasive AC current measurement. It features a primary range of 0 to 400A and a secondary output of 0 to 5A. The device operates at frequencies of 50Hz or 60Hz with an accuracy class of 0.5. Rated at 5VA, it utilizes E-class insulation and supports DIN rail mounting. Physical dimensions are 4.252 inches in length by 2.008 inches in width, with a hole height of 2.17 inches and width of 2.01 inches.

Feature Summary

• Non-invasive split-core design allows installation without disconnecting conductors
• Provides accurate 0.5% Class measurement for industrial monitoring applications
• Supports standard 50Hz and 60Hz power system frequencies
• Enables direct connection to panel meters or data acquisition systems via 5A secondary output

Applications

• Switchgear monitoring
• Distribution systems
• Generator sets

Procurement Notes

Verify the specific catalog number against official Simpson Electric documentation to confirm the 400/5 ratio and 5VA rating. Ensure the application environment matches the E-class insulation requirements. Confirm that the DIN rail mounting style aligns with the enclosure design. Check for any regional compliance certifications required for the target market before finalizing the order.

Selection Notes

Select this component when non-invasive monitoring of currents up to 400A is required. The 5A secondary output is suitable for legacy panel meters or modern transducers requiring standard current inputs. Consider the physical aperture size to ensure it accommodates the conductor diameter. Verify that the 0.5% accuracy meets the precision needs of the specific circuit being monitored.

Part Context

This model belongs to the Simpson Electric 30000 Series of split-core current transformers. These devices are engineered for industrial environments where safe, isolated current sensing is critical. The series offers various ratios to match different load profiles while maintaining consistent form factors and mounting standards across the product line.

Replacement Considerations

Direct substitutes include other Simpson Electric split-core models such as the 37031 (100/5) or 37034 (600/5) if the current range differs. Cross-brand replacements must match the 400/5 ratio, 5VA burden, and 0.5% accuracy class. Verify that the replacement unit supports the same DIN rail mounting and physical aperture dimensions.