Boardman transformer

Description

• Manufacturer: Boardman Transformers (UK)
• Type: CL
• Power rating: 6.25 kVA
• Frequency: 50/60 Hz
• Standard: EN61558
• Primary (input): 415 V AC
• Secondary (output): 690 V AC
• Secondary current: 5.2 A
• Serial/Reference: 61920

What it does

This transformer provides:
• Electrical isolation between the input and output circuits for improved safety and reduced electrical noise.
• Voltage step-up from 415 V to 690 V.

Power check

The ratings are consistent:
• Output power = 690 V × 5.2 A ≈ 3.6 kVA (single-phase equivalent).
• However, since the primary voltage is 415 V, 690 V, and the stated 6.25 kVA rating, this is almost certainly a three-phase transformer. For a three-phase transformer:

I = \frac{6250}{\sqrt{3}\times690} \approx 5.2\text{ A}

This matches the nameplate exactly.

So the transformer is:
• Three-phase
• 415 V → 690 V
• 6.25 kVA
• Maximum output current: 5.2 A

Make offers cost over 2k new never used