The only standard data isolator that has the VDE 0884-11 certifications with a VIORM (Working voltage) sufficiently high enough to support 1500Vrms is the MAX22444/5/6 (VIORM = 2121VPK)
Working Voltage refers to the maximum voltage that a device or circuit can safely withstand on a continuous basis without causing damage or failure
MAX22444–MAX22446 - Reinforced, Fast, Low-Power, Four-Channel Digital Isolators
For a full evaluation of MAX2244x series, users can purchase an evaluation kit from analog.com