Utilities and grid operators demand IEC 61869 type-tested instrument transformers that stay accurate for decades in the substation yard. NAHU delivers them from 10–35 kV.
NAHU supplies outdoor CTs and VTs, combined metering boxes, and vacuum circuit breakers for transmission and distribution substations from 10–35 kV — each unit type-tested to IEC 61869 for revenue and protection duty.
Outdoor current and voltage transformers on the 35 kV bus provide revenue-grade measurement for wholesale and cross-border energy accounting. NAHU oil-free, epoxy-cast outdoor CTs and VTs handle the full weather range.
10–24 kV outdoor CT/VT sets and combined metering boxes feed distribution feeders, giving operators accurate load and energy data per circuit. NAHU metering boxes integrate CTs, VTs, and meter chambers in one compact unit.
Protection-class windings on the same CTs drive overcurrent and distance relays, with metering and protection on one iron core. NAHU multi-secondary CTs and VCBs interface cleanly with modern relay suites.
From the bushing to the meter, NAHU builds the complete measurement chain for substation bays. Send us your bay layout and accuracy requirements for a full package quotation.
Outdoor CTs from 10–35 kV in metering and protection classes, with multiple secondary windings per unit.
Outdoor VTs from 10–35 kV, weatherproof and type-tested for substation yard installation.
Combined outdoor metering boxes that bundle CTs, VTs, and metering chamber into one tamper-resistant unit.