Chapter 2 Installation
Accura 3300E User Guide
Page 20
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PT[Potential Transformer]
External PTs should be used in case of measuring the voltage greater than the voltage input
specified above. PTs should conform to UL 61010-1.
Caution
In case of using the external PT, fuse should be installed at PT secondary.
Current Input
Item
Description
Port name
1S, 2S, 3S, 1L, 2L, 3L
Connector type
Terminal block[busbar]
Wire spec
2.1 to 6.0 mm
2
[ 14 to 10 AWG]
Rating
5 A nominal/10 A full scale 3~
Accura 3300E-5A
1 A nominal/2 A full scale 3~
Accura 3300E-1A
Measuring Range
[Accuracy guaranteed]
50 mA
–
10 A
Accura 3300E-5A
10 mA
–
2 A
Accura 3300E-1A
Minimum measurable
current
Default 20 mA [Configuration can be
done from 5mA]
Accura 3300E-5A
Default 10 mA [Configuration can be
done from 5mA]
Accura 3300E-1A
Burden
Up to 0.01 VA/phase @10A
Measurement Category
CAT
Ⅲ
CT[Current Transformer]
Item
Description
Standard compliance
UL 61010-1
Burden
> 3VA
Note
In case that peak expected load is remarkably lower than CT rating current, selecting the much
lower CT rating current can improve accuracy and resolution.
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