ECOTAP® SPD®
The new standard in single-phase transformer technology
Single-phase on-load tap-changer and automatic voltage regulation all-in-one
As load and DER increase, voltage at the grid edge can limit additional connections. ECOTAP® SPD® stabilizes voltage directly at the transformer and keeps it within limits automatically without manual intervention.
ECOTAP® SPD® enables single-phase pole‑ or pad-mounted voltage regulating distribution transformers (VRDT). The VRDT continuously regulates the secondary voltage under changing load and generation conditions. Field installations follows standard transformer deployment – no additional equipment, cabinets or installation steps required.
Your Advantages at a Glance
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Plug & play solution
Voltage is kept within limits automatically, without manual control or complicated commissioning
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One size fits all
One product, one material number, multiple applications/use cases/value streams
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Increase hosting capacity
More DER and load can be connected without exceeding voltage limits
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Cost-effective alternative
Reduce need for costly line expansion, capacitor banks, or other voltage regulating equipment
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No additional infrastructure required
Control, measurement, and regulation are fully integrated in the transformer
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Deploy like a conventional transformer
Same installation processes – no additional field complexity
Product Information
| Designation | ECOTAP® SPD® I 15-26-09 09 0 |
| Type of transformer | 1ph overhead- or pad-mounted-type distribution transformer |
| Operating positions | 9 |
| Max. rated through-current Irm | 15 A |
| Max. rated step voltage Uirm | 500 V |
| Highest voltage for equipment Um | 26 kV (IEEE C57.131), 24 kV (IEC 60214-1) |
| Insulating liquid | Mineral oil, synthetic ester, natural ester (on request) |
| Max. number of tap-change operations | 500,000 |
| Ambient temperature | -40…+55 °C |
| Connection for AC power supply and voltage measurement | Split-phase (single-phase three-wire system), single-phase two-wire system |
| Permissible rated supply voltage | 100…250 VAC -15%/+10% |
| DC power supply (service interface): Nominal voltage Nominal current |
24 VDC 1.5 A |
| Control interface | Windows application 'ECOTAP® SPD® Control' |
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| Designation | ECOTAP® SPD® I 15-26-09 09 0 |
| Type of transformer | 1ph overhead- or pad-mounted-type distribution transformer |
| Operating positions | 9 |
| Max. rated through-current Irm | 15 A |
| Max. rated step voltage Uirm | 500 V |
| Highest voltage for equipment Um | 26 kV (IEEE C57.131), 24 kV (IEC 60214-1) |
| Insulating liquid | Mineral oil, synthetic ester, natural ester (on request) |
| Max. number of tap-change operations | 500,000 |
| Ambient temperature | -40…+55 °C |
| Connection for AC power supply and voltage measurement | Split-phase (single-phase three-wire system), single-phase two-wire system |
| Permissible rated supply voltage | 100…250 VAC -15%/+10% |
| DC power supply (service interface): Nominal voltage Nominal current |
24 VDC 1.5 A |
| Control interface | Windows application 'ECOTAP® SPD® Control' |
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How ECOTAP® SPD® simplifies operations
This patented all-in-one design results in seamless integration into existing infrastructure – no external controller, no complicated commissioning and a solution that is able to resolve multiple voltage related scenarios for your customers.
