108
8.
Appendices
8.1 Specifications (continued)
■
Dedicated CT specifications
* Only applied when attached to the main unit.
* UL standards are not supported.
Model
KM-NCT-E100A
KM-NCT-E250A
KM-NCT-E500A
Rated primary current: In
100 A
250 A
500 A
Rated secondary current: Is 1 A
Rated frequency
50/60 Hz
Overcurrent withstand
capability (continuous)
1.2 In
Overcurrent withstand
capability (1 sec)
4 In
Output characteristics
±3% FS
±1% FS
Phase error
±180 minutes (1.0 In)
±240 minutes (0.2 In)
±60 minutes (1.0 In)
±90 minutes (0.2 In)
Rated load
1 VA
Insulation resistance
100M
Ω
min. (at DC500V mega) between core and all output terminals
Dielectric strength voltage
AC2300V, 1 minute between core and all output terminals
Weight
Approx. 170g
Approx. 175g
Approx. 290g
Maximum wire diameter
24 dia.
24 dia.
36 dia.
Output overvoltage
protection
Built-in clamp element
Operating temperature and
humidity range
-20 to 55°C, relative humidity: 85% max. with no condensation
Storage temperature and
humidity range
-30 to 90°C, relative humidity: 85% max. with no condensation
Applicable standards *
EN61010-1, EN61010-2-030, EN61326-1
Installation environment
Overvoltage category and measurement category:
II
, Pollution level: 2