The Senva CVT-FUSE-3PH is a three-fuse 3-phase kit (one black, one red, one blue lead) for Senva CVT Current/Voltage Transducer installations, providing a 1/2 Amp, 600VAC slow-blow fuse with a 200kA AC interrupting rating. It supplies the overcurrent protection required when a CVT voltage reference run exceeds 20 ft (runs under 10 ft require no fusing per UL 240.21 tap-rule guidance).
Senva CVT-FUSE-3PH CVT Fuse Kit
Senva's CVT architecture keeps all high-voltage connections within the CVT enclosure, and per UL 240.21 tap-rule guidance no overcurrent protection is required for voltage reference runs under 10 ft. When a reference run must exceed 20 ft, this in-line fuse kit provides the required protection without consuming panelboard breaker space.
Best For
- CVT voltage reference runs over 20 ft
- Remote meter base placement outside the panel
- Retrofit metering with long wiring paths
Key Features
1/2A 600VAC Slow Blow
Correctly sized protection for CVT voltage reference taps, with a 200kA AC interrupting rating.
Three-Fuse 3-Phase Kit
One black, one red, and one blue fuse lead in a single part number — phase-identified protection for a full 3-phase CVT install.
For Long Reference Runs
Required when a CVT voltage reference must exceed 20 ft; runs under 10 ft need no overcurrent protection per UL 240.21 guidance.
In-Line Simplicity
Installs directly in the CVT voltage reference wiring — no panelboard breaker space needed.
Technical Specifications
Specifications verified against the Senva CVT Series datasheet.
| Fuse | |
| Fuse Type | 1/2 Amp, 600VAC slow blow |
| Interrupting Rating | 200kA AC |
| Lead Color | 3-Phase kit: black, red, blue (one each) |
| Application | |
| Use Case | Overcurrent protection for CVT voltage reference runs over 20 ft |
| Note | Runs under 10 ft require no fusing per UL 240.21 tap-rule guidance |
Documentation
Senva CVT Current/Voltage Transducers Datasheet- Motor Engineering Formulas Reference
- Electrical Wire Sizes Selection Guide
Related Senva Metering Products
CVT Current/Voltage Transducers
The transducers this kit protects — 300A to 6000A flexible split-core Rogowski CVTs.
Protocol energy meter for CVT installations.
Pulse-output energy meter for CVT installations.
Frequently Asked Questions
When do I need the CVT-FUSE-3PH?
When a CVT voltage reference run exceeds 20 ft. Senva ships EM Series meters with no more than 10 ft of voltage reference wire per CVT, and runs under 10 ft require no overcurrent protection per UL 240.21 tap-rule guidance.
What fuse does the kit use?
A 1/2 Amp, 600VAC slow-blow fuse with a 200kA AC interrupting rating — matched to the CVT voltage reference circuit.
What is included in the 3PH kit?
Three in-line fuse assemblies — one black, one red, one blue lead — covering all three phases of a CVT installation with clear phase identification.
- Accessory Type:
- Fuse Kit
- Fuse Rating:
- 1/2A 600VAC Slow Blow
