HY5825YV parameters of single-phase intelligent power monitoring and control instruments For a variety of single-phase power distribution circuit voltage measurement Measurements: voltage, frequency Input: 2-way switch status input Communication: RS485 bus Output: 2 relay outputs Size: 96 * 96mm Then recommended ELA194I-5X1 AC ammeter ELA195I-5X1 DC ammeter ELZ194U-5X1 AC voltmeter ELZ195U-5X1 DC voltmeter ELD194F-5X1 frequency table ELD194H-5X1 Power Factor Meter ELA194I-3X1 AC ammeter ELA195I-3X1 DC ammeter ELZ194U-3X1 AC voltmeter ELZ195U-3X1 DC voltmeter ELD194F-3X1 frequency table ELD194H-3X1 Power Factor Meter ELA194I-3X4-phase AC ammeter ELZ194U-3X4 three-phase AC voltage meter