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Transformer Specifications The Department of State's European Logistics Support Office (ELSO) requires 2000W step-up transformers for residential use with the following specifications:
| No. |
| Requirements |
| Pass/Fail |
| 1 |
| 220/240VAC to 110/120 VAC |
| 2 |
| Auto-Transformer w/ Red Polarity Warning Light (or Isolation) |
| 3 |
| Polarity warning light is clearly labeled “Light on, Polarity Reversed” |
| 4 |
| Ground Fault Circuit Interrupter (GFCI) safety feature or comparable which will discontinue input power if any ground current or 10mA or more is sensed |
| 7 |
| Unit is thermally protected |
| 8 |
| Portable: handle, size, and weight |
| 9 |
| Indicator Pilot Light (Indicating the unit is ON) |
| 10 |
| Possesses label with UL listed or UL recognized symbols or independent testing agency equivalent*** |
| 11 |
| European three-prong SCHUKO plug |
| 12 |
| Should rest on raised non-conducting feet or minimum (2 cm) to assure no contract with the set-up surface. |
| 13 |
| All internal wiring should be color coded |
| 14 |
| All internal wiring should be temperature rated to withstand heat generated from transformer |
| 15 |
| Suitable for ambient operation between -5 to 40 degrees Celsius |
| 16 |
| Windings should be cooper not aluminum conductors |
| 17 |
| Wiring sizes shall be provided to carry the current capacity of the transformer rating size |
Notes:
* Polarity warning light must be clearly labeled on the unit "Light on, Polarity Reversed or comparable."
* Unit that is provided with a Green Polarity OK light is acceptable. Must be labeled. Red polarity OK light is not acceptable.
** To prevent potential shock hazards, customer requires a two-pole Ground Fault Interrupter (GFI) safety feature that will discontinue the supply of input power to the voltage converter unit if any ground fault current or 10 mA or more is sensed.
*** If other independent listing agency is used, TÜV, CSA, VDE, online verification site information must be provided.
**The GFI device shall be wired to sense ground fault current paths related to the unit’s metallic components as well as any ground fault paths via connected appliances plugged into the unit’s output receptacles.
***GOV reserves the right to accept or reject independent agency listing if NOT verifiable online, i.e.. www.ul.com/database , https://www.tuev-sued.de/product-testing/certificates.
***Documentation describing labeling as "UL accepted", "UL approved", or "UL certified" alone will not be accepted. The unit must be appropriately marked.
***CE is not a recognized independent testing agency and will not be accepted.
***The submitted technical data must be verifiable against publicly available/online information.
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Department of State