| 摘要 |
A plug in emergency light unit can be plugged into any standard mains voltage socket by 3 pins, when during normal power it is charged using the internal low power solid state charger 6 and charges the battery 8, during power failure the internal solid state transistor based switch 7 switches power to the battery illuminating the 4 white LED's 2, when power is restored the switch is switched back to recharge the battery 8 and the status indicator 2 will change from green (charged) to red (charging). The unit also houses a fuse 9. |
