PILZ S1PN 400-500VAC 2c/o – 890210 | JUAL PILZ S1PN 400-500VAC 2c/o – 890210 – Phase sequence monitoring relay to detect the phase sequence, the phase failure, the asymmetry of a three-phase supply, measuring voltage= supply voltage, 2 C/O contacts, width 22.5 mm, UB = 400 – 500 V AC.