控件[tem_25_34]渲染出错,Source:未将对象引用设置到对象的实例。
CWT和CWT低频电流探头，低频至20MHz
概述
带宽1Hz至16mhz(参见各型号带宽规格)
CWT LF模型具有扩展的LF带宽和低相移<1Hz
型号涵盖0.5A - 1200kA安培范围
300:1的测量范围，例如300A CWT探头将测量1A
0.2%的准确率
绝缘性能
可选静电屏
灵活的“夹式”线圈
±6V瞬时隔离输出，适用于示波器、数据记录仪、PCI DAC卡和功率分析仪
使用4节AA电池或12V ac适配器(110V或230Vac)
包括可追溯的校准证书
CE标志
多种型号的库存
指标
| Application | Typical uses |
| Power analyzers | Convenient method of extending the current, power and harmonic measurement range without bandwidth degradation. Excellent low frequency (0.5Hz) performance along with low phase shift |
| Motor drives and power electronic converters | Allows measurement of IGBT switching times, gate turn on / turn off times and peak current |
| Motors and generator | Easy retrospective installation of probes around conductors where regular clamp and split core CTs are unsuitable |
| Induction heating | Measurement of high current / high frequency signals, including high order harmonic effects |
| Pulsed current applications | Semiconductor switches: IGBT, Power MOSfets, capacitor discharge and circuit breaker interruption currents |
| Pulsed current applications | Measurement of peak currents without breaking conductors |
Selection table for CWT range - these current probes have full 300:1 range
| CWT Specifications | |||||||||
|---|---|---|---|---|---|---|---|---|---|
| Type | Sensitivity (mV/A) |
Peak current | Peak di/dt (kA/uS) |
Noise max*1 mV pk-pk |
Droop typ. (%/ ms) |
LF (3dB) bandwidth typ. (Hz) fL |
Peak di/dt (kA/us) |
HF (3dB) bandwidth typ. (MHz) fH*2 |
|
| Coil Length 300mm |
Coil Length 700mm |
||||||||
| High Sensitivity Ranges of CWT .... measuring currents from 300mA | |||||||||
| CWT015 | 200.0 | 0.1A to 30A | 0.2 | 6.5 | 130 | 150 | 2.0@6kHz | 6 | 4 |
| CWT03 | 100.0 | 0.2A to 60A | 0.4 | 4.5 | 90 | 105 | 2.0@4kHz | 10 | 6.5 |
| CWT06 | 50 | 0.4 to 120A | 0.8 | 3.0 | 70 | 80 | 2.0@3kHz | 16 | 10 |
| CWT1 | 20.0 | 1A to 300A | 2.0 | 2.5 | 40 | 50 | 1.9@2kHz | 16 | 10 |
| CWT1N | 20.0 | 1A to 300A | 2.0 | 2.0 | 20 | 25 | 1.9@1kHz | 10 | 5 |
| CWT3 | 10.0 | 2A to 600A | 4.0 | 8.0 | 3.0 | 3.5 | 1.0@300Hz | 16 | 10 |
| High Sensitivity Ranges of CWT .... measuring currents from 300mA | |||||||||
| CWT3N | 10 | 2A to 600A | 4.0 | 14.0 | 0.9 | 1.0 | 1.7 | 10 | 5 |
| CWT6 | 5.0 | 4A to 1.2kA | 8 | 14.0 | 0.9 | 1.0 | 1.7 | 16 | 10 |
| CWT15 | 2.0 | 10A to 3kA | 20.0 | 7.0 | 0.7 | 0.8 | 1.3 | 16 | 10 |
| CWT30 | 1.0 | 20A to 6kA | 40.0 | 5.0 | 0.5 | 0.6 | 0.9 | 16 | 10 |
| CWT60 | 0.5 | 0.04kA to 12kA | 40.0 | 5.0 | 0.5 | 0.6 | 0.9 | 16 | 10 |
| CWT150 | 0.2 | 0.1kA to 30kA | 40.0 | 3.0 | 0.2 | 0.2 | 0.3 | 16 | 10 |
| CWT300 | 0.1 | 0.2kA to 60kA | 40.0 | 3.0 | 0.1 | 0.1 | 0.2 | 16 | 10 |
| CWT600 | 0.05 | 0.4kA to 120kA | 40.0 | 3.0 | 0.06 | 0.05 | 0.1 | 16 | 10 |
| CWT1500 | 0.02 | 1kA to 300kA | 40.0 | 3.0 | 0.035 | 0.03 | 0.06 | 16 | 10 |
| CWT3000 | 0.01 | 2kA to 600kA | 40.0 | 3.0 | 0.035 | 0.03 | 0.06 | 16 | 10 |
| CWT6000x | 0.005 | 4kA to 1200kA | 40.0 | 3.0 | 0.035 | 0.03 | 0.06 | 16 | 10 |
| Coil and cable | |
| COIL CIRCUMFERENCE ‘A’ (mm) | 300, 500, 700 or 1000mm |
| COIL CROSS SECTION ‘B’ (mm) (dependent on "Peak coil voltage isolation" see below) |
8.5 (supplied with 10kV insulation as standard) 14.0 (with protection sleeve) |
| PEAK COIL VOLTAGE ISOLATION (kV) | 10 |
| Safe peak working voltage to earth. The coils are flash tested at 15kVrms for 60 seconds. The coil is supplied with a removable silicone sleeve which provides additional mechanical protection. | |
| TEMPERATURE RANGE (℃) | -20°C to 100°C |
| For de-rating due to temperature cycling please consult Powertek | |
| CABLE LENGTH (metre) (from box to coil) | 2.5 or 4 |
| Power input - mechanical - environmental | |
| Power Supply | All CWT units are supplied with four AA batteries (typical life 90 hours) and a 12V-24Vdc input socket A Universal Power adapter is included with the CWT probe (accepts 115Vac or 230Vac) Rechargeable batteries and internal charger, option R, is available. (batteries are charged whenever external +12-24V dc supply is present). Typical recharge time 40 hrs, typical life 8 hrs. |
| INTEGRATOR BOX DIMENSIONS (mm) | H =183mm, W = 93mm, D = 32mm |
| OUTPUT SOCKET | BNC (output impedance 50 ohms- unit supplied with 0.5m BNC-BNC coaxial cable) |
| MIN. OUTPUT LOADING |
100kohm (for rated accuracy), 50ohm drive capability optional. |
| TEMPERATURE RANGE (℃) | 0℃ to +40℃ |
| Ordering | Model CWT unit is supplied with bnc-bnc cable, 12-24Vdc input, 4 AA batteries, power adapter and user manual, calibration certificate and carry case. |
Cable length (m) | Coil circumference (mm) |
| e.g. order code = 6kApk, 4 AA Batteries, 12-24Vdc input, ac adapter, 2.5 metre cable, 500mm coil (Coil insulation is 10kV as standard) | CWT30B | 2.5 |
500 |
| e.g. order code = 6kApk, 4 AA Batteries, 12-24Vdc input, 230V ac adapter, 4 metre cable, 300mm coil | CWT30B | 4 | 300 |
| e.g. order code = 1.2kApk, 4 AA rechargeable batteries, internal battery charger, 12-24Vdc input, ac adapter, 2.5 metre cable, 500mm coil | CWT6R | 2.5 | 500 |
