Artesis AMT Toolkit, Руководство пользователя

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Appendices
75
VOLTAGE MEASUREMENT
Voltage transformers must meet local standards and regulations. For North America,
current and voltage transformers must be certified by an OSHA appointed NRTL to
appropriate UL or CSA - product safety standards.
Only SELV voltage transformers
must be used with AMU units.
Over Voltage Category CAT II
Impedance 3.5MOhm/Phase-to-Phase
Quantity Nominal Minimum Maximum
Measurable
Maximum
Permissible
Units
Voltage 480/277 20 520/300 606/350 VAC
Frequency 50/60 25 90 90 Hz
CURRENT MEASUREMENT
Current transformer and current sensors must meet local standards and regulations.
For North America, current and voltage transformers must be certified by an OSHA
appointed NRTL to appropriate UL or CSA - product safety standards.
Max. 250VAC, CAT II for 5A and 1A units.
Over Voltage
Category CAT II
Quantity Nominal Minimum Maximum
Measurable
Maximum
Permissible
Units Impedance
(Approx.)
Current 5 0.2 7 20
(For 5 s)
A 15.3 mOhm
1 0.04 1.4 4
(For 5 s)
A 50 mOhm