Source: https://guthlabs.ai/docs/instruments/unit-converter-electrical/

instrument / verified-clean

# Unit Converter (electrical)

The current ledger marks this instrument verified clean within the source-bound verification corpus.

Status: **VERIFIED_CLEAN**Lifecycle: **verified-clean**

## Inspectable records

[01**Overview**Purpose and lifecycle](<https://guthlabs.ai/docs/instruments/unit-converter-electrical/>)[02**Mechanism**Method and assumptions](<https://guthlabs.ai/docs/instruments/unit-converter-electrical/mechanism/>)[03**Implementation**Binding and validation](<https://guthlabs.ai/docs/instruments/unit-converter-electrical/implementation/>)[04**Qualification**Evidence and errata](<https://guthlabs.ai/docs/instruments/unit-converter-electrical/qualification/>)

## Ledger state

The current ledger marks this instrument verified clean within the source-bound verification corpus.

**Area**: Electrical & Electronics Engineering — Circuits, Power Systems, Electronics Lab

**Tranche**: tranche-4

**Evidence ID**: t4-006

**Ledger rows**: 1

No ledger note is attached.

## Review findings

The claimed scope is ambiguous because it lists multiple electrical quantities but supplies only value, from-unit, and to-unit. The exact missing constraint is that source and destination units must have compatible dimensions; cross-quantity conversion requires additional physical relationships and inputs.

### Formula and scope findings

- "SI prefix scaling" is incomplete without an explicit prefix-to-factor mapping and the rule converted_value = input_value × factor(from-unit) ÷ factor(to-unit).

- Conversions are valid only between units of the same physical quantity; V cannot be converted to A, W, Ω, F, H, Hz, VA, or VAR without additional circuit or power-factor inputs.

- VA, W, and VAR must not be treated as interchangeable: VA is apparent power, W is real power, and VAR is reactive power, despite related dimensional scaling.

- The specification does not define whether unit symbols are case-sensitive or how prefixed forms such as kV, mA, MΩ, kVA, and kVAR are parsed.

### Unit assumptions

- The vectors assume SI decimal prefixes: m = 10^-3, k = 10^3, and an unprefixed unit = 1.

- Conversion is performed only between units representing the same physical quantity.

- Unit symbols are assumed to be case-sensitive: V, A, W, Ω, F, H, Hz, VA, and VAR are distinct tokens.

- The numerical value is dimensionless before applying the source and destination unit scale factors.

## Boundary hardening

**BREAK_CLAIMED** · SELF_FLAGGED

The extreme conversion 10^308 W to nW requires 10^317 nW, which overflows standard JavaScript Number arithmetic to Infinity. The converter should reject, flag overflow, or use arbitrary-precision handling.

## Errata and corrections

No applied erratum is attached to this unique-name record.

## Inspectable example

4 review vectors are recorded. One source-bound sample is shown below.

````
{
  "inputs": {
    "value": 3.3,
    "from_unit": "kV",
    "to_unit": "V"
  },
  "expected_outputs": {
    "converted_value": 3300
  },
  "working": "kV factor = 1000; V factor = 1. converted_value = 3.3 × 1000 ÷ 1 = 3300 V."
}
````

## Related workflows

No source-defined multi-instrument workflow membership is recorded.

## Sources and evidence

These pointers bind the page to evidence. They do not grant authority or collapse verification into deployment.

- `VERIFIED_LEDGER.json · VERIFIED_CLEAN`

- `evidence-tranche4/tranche4-results.json`

- `BOUNDARY_HAZARD_CATALOG.json`