Product Details
STCK691/2 series retro-fit (Clamp-on) current transformer has been specially designed to facilitate theri installation in new or already existing net works. They may be installed without opening any cable or bus-bar circuit. An internal presision resistor across the secondary winding of the CT provides a low safe voltage output. It can save time and the installation costs.
FeaturesClamp on design, Fastening, safe, easy to install, portable
Wide inner window, allowing clamping of big cables or bus-bar
Wide range of sizea to accommodate all the existing installations
ApplicationsCurrent measurement, monitoring and protection for electrical wiring and equipment. Current and power measurement for electric motore, lighting, air compressor, heating and ventilation system, air-condition equipment and automation-control system. Current, power and energy monitoring device. Relay protection device.
Circuit connection diagramTechnique Index
Electrical Parameter |
Mechanical Parameter |
Frequency |
50-400Hz |
Case |
ABS/UL94-V0 |
Rated Input |
5A-3000A |
Bobbin |
PBT |
Measuring range |
5%In-130%In |
Core |
Silicon steel/Permalloy |
Rated Output |
0-10V (AC) or 0-5A |
Internal structure |
Screw |
Ratio |
≤±0.2% |
Construction |
Screw |
Phase angle |
≤±30min |
Operating Temp |
-25ºC - +75ºC |
Dielectric strength |
3.0KV/1mA/1min |
Operating Humidity |
≤85% |
Insulation Resistance |
DC500V/100MΩ/min |
Output Connection |
UL1015 22AWG Wire ( twinsted wire) 2.5m |
Type Selecion
Mfg P/N |
Rated Input (A) |
Ratio |
Accuracy |
Dimensions (mm) (ID-L-W-H) |
SCTK691A-008 |
0-20A |
1000:1 2000:1 2500:1 4000:1 |
0.1,0.2,0.5 |
8.0-135.0-42.0-20.0 |
SCTK691A-013 |
0-100A |
13.0-137.0-42.0-25.0 |
SCTK691A-020 |
5-250A |
20.0-137.0-46.0-25.0 |
SCTK691A-050 |
100-1200A |
50.0-215.0-104.0-27.0 |
SCTK691A-085 |
100-1500A |
82.0-52.0-272.0-116.0-37.0 |
SCTK691A-125 |
100-3000A |
125.0-52.0-327.0-116.0-37.0 |