Product Specifications
Brand: Siemens
Part Number: 3NJ6930-3BG11
Type: Bushing Current Transformer
Series: SENTRON 3NJ693
Primary Current: 250 A
Secondary Current: 1 A
Accuracy Class: 1
Rated Burden: 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 1 accuracy and 5 VA burden supports reliable current measurement up to 250 A in low-voltage distribution 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 | 1 |
| Rated Burden | 5 VA |
| Cable Diameter (max) | 21 mm |
| Dimensions (W×H×D) | 44 × 65 × 30 mm |
| Weight | 190 g |
Application
Used in NH1 3NJ62/63 switch disconnector assemblies for current monitoring in 250 A feeders. The 1 A secondary, combined with 5 VA burden, supports long cable runs between the CT and measuring instrument — particularly valuable in large distributed switchboard installations.
Related Products
- Siemens 3NJ6930-3DB00 — Single-CT busbar for NH1 3NJ6 switch disconnectors
- Siemens 3NJ6930-3BG12 — 250/1A NH1 bushing CT, Class 0.5 calibrated, for 21mm cables
- Siemens 3NJ6930-3BF21 — 200/5A NH1 bushing CT, 2.5 VA, for cables up to 21mm
Resources & Documentation
Siemens 3NJ6930-3BG11 SENTRON NH1 Bushing Current Transformer, 250/1A, Class 1, 21mm
Product Specifications
Brand: Siemens
Part Number: 3NJ6930-3BG11
Type: Bushing Current Transformer
Series: SENTRON 3NJ693
Primary Current: 250 A
Secondary Current: 1 A
Accuracy Class: 1
Rated Burden: 5 VA
Cable Diameter (max): 21 mm
Dimensions (W×H×D): 44 × 65 × 30 mm