GDJB-802 3 Mataki na Sakandare na Yanzu Na'urar Gwajin Kariya Relay na allurar tana taka muhimmiyar rawa wajen sarrafa tsarin wutar lantarki cikin dogaro da aminci.Yana iya yin hukunci ta atomatik akan abin da ya wuce na yanzu, over-voltage, overload, gajeriyar kewayawa, babban zafin jiki, bayanan da ba na al'ada ba da faɗakarwa don rashin aiki.