Overview
This full‑size model from the industry‑standard FJ6/PJ1 series is a dedicated three‑phase four‑wire electric energy metering joint junction box designed to serve as the central termination point for active watt‑hour meters operated by three current transformers (CTs). Rated for secondary circuits up to 660 V and 20 A, it keeps wiring neat, simplifies troubleshooting, and supports safe meter maintenance without disrupting service.
Primary Applications
Ideal for commercial buildings, industrial plants, and utility substations, this CT metering junction box is widely used in:
Four‑wire metering systems with three CTs in high‑load environments
Live meter changeover and on‑site calibration tasks
Distribution transformer panels and substation test boards
Retrofitting existing meter cabinets to improve wiring organisation
Design & Safety Features
Full‑size enclosure with a 223 mm mounting‑hole spacing ensures a firm, vibration‑resistant fix on standard DIN rails or backplates.
Easily accessible terminals reduce wiring time and make subsequent inspection straightforward.
Robust housing offers effective protection against dust ingress and accidental contact with live parts.
Integrated test points on each circuit allow quick meter accuracy checks and phase‑to‑phase measurements without removing any wires.
Technical Specifications
| Parameter | Rating / Value |
|---|---|
| Rated insulation voltage | 660 V, 50/60 Hz |
| Rated current | 5 A (max. 20 A) |
| Power frequency withstand voltage | 3000 V / minute |
| Insulation resistance | > 30 MΩ |
| Ambient temperature range | –40 °C to +60 °C |
Mounting Dimensions
Overall size (L × H × W)
235 × 63 × 37 mm
Mounting hole spacing
223 mm (centre‑to‑centre)
Mounting holes
2 × φ5 mm
Why Choose This Junction Box?
Designed for long‑term reliability in demanding secondary metering circuits, this three‑phase four‑wire energy metering joint box combines a compact footprint with generous internal space for easy wiring. The clearly marked terminals and dedicated test ports reduce service time, while the sturdy construction ensures secure connections even in harsh industrial conditions. It is a cost‑effective upgrade for any meter panel requiring organised, test‑ready CT wiring.
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