Papers A and B defined the self-contained emergency luminaire's duty and selected its NiMH cells. Paper C is the type-test and certification trail: exactly how a manufacturer proves, to a notified body and to a building owner, that the fitting will switch on within fractions of a second and hold its rated duration after four years on a hot ceiling. It follows the layered structure of IEC 60598-1, IEC 60598-2-22, EN 1838 and EN 62034, with cell-level evidence from IEC 61951-2 and IEC 62133.
IEC 60598-1 is the general luminaire safety standard - its 2024 edition adds an Annex W battery-safety package that every battery-emergency product must now address. IEC 60598-2-22 is the particular standard for emergency lighting luminaires up to 1000 V: it defines self-contained and centrally supplied types, maintained and non-maintained operation, the internal charger and changeover behaviour, marking and the complete type-test sequence. EN 1838 is the application standard that sets the lighting outcome - escape-route illuminance of at least 1 lx on the centre line, open-area levels, uniformity limits, glare control and the switchover and duration expectations the luminaire must support. EN 62034 governs automatic test systems, including the self-test logic built into modern fittings. At cell level, IEC 61951-2 covers sealed NiMH cells and IEC 62133-1 their safety; UN 38.3 covers transport. The animated stack sequences these from the luminaire file to the shipping document.
The heart of type testing is the endurance discharge. A fresh, fully charged fitting is held at the declared reference ambient, its normal supply is interrupted, and the emergency light output and battery voltage are logged continuously until the light can no longer sustain the declared flux or the driver drops out. Measured duration must meet the rated value (one, two or three hours) with flux reaching at least half of nominal within the first five seconds and holding the required level throughout. Switchover time is captured on a fast logger at each failure mode - abrupt loss, slow decay of the normal supply and momentary interruption - and must stay inside the class limit (0.25 s for high-risk-task-area fittings, within five seconds for ordinary escape lighting). The recharge test then verifies that after a full discharge the charger returns the battery to the state required for another rated event within 24 h. Crucially, the same duration test is repeated after the high-temperature endurance programme, which is how the standard guards against a fitting that passes only when new.
IEC 60598-2-22 accelerates service life in the laboratory: the battery is cycled and held at elevated temperature in patterns that represent years of float and self-test, after which it must again deliver rated duration. Designing for that test is where the NiMH float regime from Paper B is proven: temperature-compensated maintenance current, a bonded thermistor and matched cells show up directly as retained capacity after endurance. The animated chart below contrasts the capacity trajectory of a well-managed pack in a mild ambient with an uncompensated pack in a hot ceiling; it is an illustrative model of heat-driven aging, while the formal declaration cites the manufacturer's actual endurance data. Also tested are behaviour after prolonged idle, repeated charge-discharge cycles representing monthly self-tests, and the charger's response to a faulted or reversed cell.
Beyond the battery, the luminaire is photometered to confirm the spacing-to-height tables that designers use to meet EN 1838's 1 lx route requirement, with emergency flux measured rather than inferred from the maintained LED output. Functional tests cover the status indicator (healthy, charging, fault), the manual test button, remote-inhibit and rest-mode inputs where fitted, and correct operation of any automatic test schedule under EN 62034: a short functional test at the frequent interval, a full rated-duration test annually, visible or signalled fault indication, and a log that survives power loss. EMC to the luminaire standards and construction tests - creepage and clearance, screw terminals, impact and ingress rating for corridor and stairwell environments - complete the electrical-safety case.
IEC 62133-1 provides the cell and battery safety evidence - controlled charge and discharge, external short, overcharge, free fall, shock and vibration, thermal abuse - while Annex W of IEC 60598-1:2024 adds battery-system documentation expectations on top. Marking carries rated voltage and duration, maintained or non-maintained class, battery chemistry and replacement data, ambient rating and the test-standard reference - increasingly cross-checked against European battery-labelling obligations. A complete audit file for a distributor or notified body contains: the 60598-1/-2-22 type-test reports, EN 1838 photometric spacing data, EN 62034 self-test report, 61951-2 cell datasheets, 62133-1 safety report, UN 38.3 transport summary, high-temperature endurance results and a four-year capacity declaration. That package is what distinguishes a certified safety product from an untested look-alike.
Weijiang Power supplies the NiMH cells, welded strings and evidence package behind certified emergency luminaires: temperature-managed float design, four-year endurance data, IEC 61951-2 and IEC 62133-1 dossiers and UN 38.3 summaries. Send your rated duration, emergency LED wattage, enclosure ambient profile and target service life and we will align the pack and its documentation with your IEC 60598-2-22 and EN 1838 type-test programme.
