제조회사 : POWERTEK
영문명 : CWT Rogowski Current TransducerSpecification
ACCURACY (5 to 100% full scale)
Within the limits of bandwidth and low frequency noise that are specified on the relevant CWT specification sheet.
Calibration: Normally ±0.2% (traceable to UKAS) with the conductor central in the CWT loop. See the calibration certificate for more details.
Positional accuracy: ±1% typ. variation of accuracy with conductor position in the loop (see .Obtaining The Best Measurement.)
Linearity: ±0.05% typ.
The CWT can be powered by both battery and an external DC voltage. With the external DC supply present the batteries are inoperative.
Battery type: 4 (four) 1.5V AA alkali
Battery life: 70 hrs typ.
DC socket type: 2.1 or 2.5mm jack socket . polarity indicated on front of CWTDC voltage: 12 to 24V DC (±10%)
DC quiescent supply current: 30mA (@12V DC) , 30mA (@ 24V DC)
When specified with rechargeable batteries the CWT operates directly from the batteries when there is no DC supply present and is powered directly from the DC supply when present. With the DC supply present the rechargeable batteries are permanently trickle charged.
Battery type: 4 (four) 1.2V NiMH rechargeable batteries
Battery life: 30 hrs typ. (based on a 1400mAH cell)
Recharge time: 40 hrs typ.
DC socket type: 2.1 or 2.5mm jack socket . polarity indicated on front of CWT
DC voltage: 12 to 24V DC (±10%)
DC quiescent supply current: 70mA (@12V DC) , 70mA (@ 24V DC)
Maximum output voltage: ±6V (corresponding to ±Peak Current Rating of CWT)Output cable: 0.5m BNC to BNC 50Ω cable
Minimum output loading: 100kΩ
OPERATING TEMPERATURE RANGES
Rogowski coil and cable -20oC to 100oC
Integrator electronics 0 to 40oC