DSE 335 - S1 & S2 Voltage; Frequency Sensing; Generator Current Sensing

Specifications
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2.5 S1 & S2 VOLTAGE / FREQUENCY SENSING
Description
Specification
Measurement type True RMS conversion
Sample Rate 5KHz or better
Harmonics Up to 10
th
or better
Input Impedance
300K Ω ph-N
Phase to Neutral 15V (minimum required for sensing frequency) to 333V AC (absolute
maximum)
Suitable for 110V to 277V nominal
(±20% for under/overvoltage detection)
Phase to Phase 26V (minimum required for sensing frequency) to 576V AC (absolute
maximum)
Suitable for 190V ph-ph to 479V ph-ph nominal
(±20% for under/overvoltage detection)
Common mode offset from
Earth
100V AC (max)
Resolution 1V AC phase to neutral
2V AC phase to phase
Accuracy ±1% of full scale phase to neutral
±2% of full scale phase to phase
Minimum frequency 3.5Hz
Maximum frequency 75.0Hz
Frequency resolution 0.1Hz
Frequency accuracy ±0.2Hz
2.6 CURRENT SENSING
Description
Specification
Measurement type True RMS conversion
Sample Rate 5KHz or better
Harmonics Up to 10
th
or better
Nominal CT secondary
rating
5A
Maximum continuous current 5A
Overload Measurement 15A for 100ms
Absolute maximum overload 50A for 1 second
Burden
0.5VA (0.02Ω current shunts)
common mode offset ±2V peak plant ground to CT common terminal
Resolution 25ma
Accuracy ±1% of Nominal (5A) (excluding CT error)