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SECTION I GENERAL INFORMATION
Utrecht
- 11 - Ref 002
3. TECHNICAL SPECIFICATIONS
The instrument’s technical specification below details the performance standard or limit to
which the instrument has been designed and tested.
3.1. INPUTS
3.1.1. AC VOLTAGES
The instrument has a three-phase AC voltage input (3 differential inputs, L1 - N1, L2 - N2, L3 -
N3). Voltage measurement is direct with internal voltage dividers. There are no internal
fuses in the voltage inputs.
Over voltage category CAT III 600 V
Input voltage range: 10 - 550 Vrms (0.02 Un - Un)
Permissible overload voltage: 600 Vrms
Resolution: 0.1 V
Accuracy: ± 0.5 % of reading ± 2 digits
Crest factor max: 1.4
Frequency range: 43 - 68 Hz fundamental
Basic r.m.s. integration period:
10 ms (1/2 of signal cycle)
3.1.2. AC CURRENTS
The instrument has three AC current inputs, suitable for Clamp-on current transformers or
other voltage output current sensors.
Input current (voltage) range: 0.02 - 1 Volt rms (0.02 In - In)
Equivalent to 20 - 1000 Amp with the standard
Clamp-on current transformer (ratio: 1000 A / 1 V).
Resolution: 0. 3 mV (0.3 Amp with the standard Clamp-on
current transformer - ratio: 1000 A / 1 V.)
Accuracy: ± 0.5 % of reading ± 6 digits plus current transformer
accuracy
Crest factor: 2.5
Maximum permissible overload: 150 % In (sinusoidal current)
Maximum input voltage: 1 Vrms
Basic r.m.s. integration period 10ms (1/2 of signal cycle)
Use double insulated minimum CAT III 600 V Clamp-on current transformers
and/or current transformers
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