Product Specifications
Brand: Siemens
Part Number: 3NJ6930-3BG12
Type: Bushing Current Transformer
Series: SENTRON 3NJ693
Primary Current: 250 A
Secondary Current: 1 A
Accuracy Class: 0.5
Rated Burden: 2.5 VA
Cable Diameter (max): 21 mm
Dimensions (W×H×D): 44 × 65 × 30 mm
Product Description
A pluggable bushing current transformer for SENTRON 3NJ62/63 NH1 in-line switch disconnectors with fuses. The 250/1 A ratio with Class 0.5 accuracy and 2.5 VA burden supports legal-for-trade energy metering in 250 A feeder applications.
NH1 Pluggable CT Design
Designed as a direct plug-in accessory for NH1 fuse-type switch disconnectors. Accepts cables up to 21 mm in diameter through the bushing opening. The compact 44×65×30 mm form factor fits within the disconnector footprint with no additional panel space required. No tools needed for installation or replacement.
Key Parameters
| Parameter | Value |
|---|---|
| Primary Current | 250 A |
| Secondary Current | 1 A |
| Accuracy Class | 0.5 |
| Rated Burden | 2.5 VA |
| Cable Diameter (max) | 21 mm |
| Dimensions (W×H×D) | 44 × 65 × 30 mm |
| Weight | 186 g |
Application
Used in NH1 3NJ62/63 switch disconnector assemblies for billing-grade energy metering at 250 A. The combination of Class 0.5 accuracy with 1 A secondary suits long-distance signal transmission to calibrated energy meters — ideal for centralized metering in multi-feeder industrial distribution boards.
Resources & Documentation
Siemens 3NJ6930-3BG12 SENTRON NH1 Bushing Current Transformer, 250/1A, Class 0.5, 21mm
Product Specifications
Brand: Siemens
Part Number: 3NJ6930-3BG12
Type: Bushing Current Transformer
Series: SENTRON 3NJ693
Primary Current: 250 A
Secondary Current: 1 A
Accuracy Class: 0.5
Rated Burden: 2.5 VA
Cable Diameter (max): 21 mm
Dimensions (W×H×D): 44 × 65 × 30 mm