The Siemens 3NJ6930-3BD13 is a low-profile bushing current transformer designed as a calibrated measurement accessory for NH1 fuse switch disconnectors. With a height of just 6 mm, it fits into space-constrained NH1 fuse assemblies where standard 44 mm tall CTs cannot be installed.

Application

Rated 100/1 A with Class 0.5 accuracy, 1.5 VA burden, and legal-for-trade calibration, this CT enables billing-grade energy measurement directly at the NH1 fuse disconnector. The 1 A secondary output is well suited for long cable runs between the switchgear and remote metering equipment. The 15.2 mm inside diameter accommodates typical conductor cross-sections in NH1 installations. Typical deployments include utility metering at NH1 feeder points, tenant billing in multi-tenant distribution boards, and energy management systems requiring revenue-grade accuracy at the fuse level.

Installation

The pluggable slip-on design enables straightforward installation onto compatible NH1 fuse switch disconnectors. The slim 6 mm profile requires minimal clearance above the fuse assembly. With contact and touch protection built in, the CT can be safely installed in energized panels by qualified personnel.

Decision Parameters