2.6 VOLTAGE & FREQUENCY SENSING
15 V (minimum required for sensing frequency) to 415 V AC
(absolute maximum)
Suitable for 345 V AC nominal
(±20 % for under/overvoltage detection)
25 V (minimum required for sensing frequency) to 720 V AC
(absolute maximum)
Suitable for 600 V AC nominal
(±20 % for under/overvoltage detection)
Common Mode Offset From Earth
1 V AC phase to neutral
2 V AC phase to phase
±1 % of full scale phase to neutral
±1 % of full scale phase to phase
Nominal CT Secondary Rating
Maximum Continuous Current
Absolute Maximum Overload
0.5 VA (0.02 R burden resistors)
±1 V peak plant ground to CT common terminal
±1 % of Nominal (excluding CT error)