自30多年前率先推出宽带罗氏电流探头以来，PEM公司一直在开发CWT系列，以及现在的屏蔽CWTHF系列，以提供先进的宽带宽交流电流测量。
英国进口PEM CWT CWTHF高频罗氏线圈，扩展了CWT系列高频带宽，增加了对瞬变大电压和工频电压的抗扰能力。CWT和CWTHF结合了易于使用的薄型、柔性、夹式罗氏线圈，能够精确复制快速开关电流波形，无论是正弦波形、准正弦波形、PWM波形还是脉冲波形。
一、主要特点
1. 获得专利的静电屏蔽线圈，对50/60Hz电压场和快速电压瞬变具有出色的抗扰度
2. 型号覆盖频率范围：0.03Hz到30MHz
3. 额定电流从30Apk到 300kApk
4. 峰值di/dt能力高达120kA/μs
5. 线圈绝缘10kVpk
6. 8.5mm（最大）线圈横截面直径
7. 仅以几个pH值加载到被测电路
8. 标准线圈长度为300毫米至1000毫米，但也有更长的线圈长度可供选择
二、产品应用
1. 电力电子开关电路中的电流瞬态测量
2. 雷击测量
3. 电源转换器开发和诊断
4. 高频(hf)正弦电流，例如感应加热
5. 在存在大直流电流的情况下测量小交流电流（例如监测电容器纹波）
6. 牵引、电机驱动和电力网络中的EMC测量
7. 测量故障电流或脉冲功率应用中的电流
三、标准与合规性
1. CE 标志
2. 符合 EMC EN61326-1
3. 符合 IEC 61010-1;IEC 61010-2-032 标准
4. PEM Ltd 已通过 ISO9001：2015 标准认证
5. 专利产品
四、产品尺寸
五、CWT罗氏线圈【旧型号】技术参数
1. 可根据要求提供高于300kA峰值电流。
2.“噪声”是内部产生的积分器噪声，它主要与LF(-3dB)带宽的频率相同。
3. 高频（-3dB)值针对2.5m电缆。
| 型号 | 灵敏度 (mV/A) | 峰值电流 (A) | 峰值di/dt (kA/μs) | 噪声 (mVp-p) | 衰减 (%/ms) | 低频带宽 (-3dB)Hz | 高频带宽 (-3dB)MHz | |
| CWT-经典款系列 | 300mm线圈 | 700mm线圈 | ||||||
| CWT/3N | 20 | 600 | 2.0 | 14 | 0.9 | 1.0 | 10 | 5 |
| CWT/6 | 5.0 | 1.2K | 8.0 | 12 | 0.9 | 1.0 | 16 | 10 |
| CWT/15 | 2.0 | 3.0K | 20 | 7.0 | 0.7 | 0.8 | 16 | 10 |
| CWT/30 | 1.0 | 6.0K | 40 | 3.5 | 0.5 | 0.6 | 16 | 10 |
| CWT/60 | 0.5 | 12K | 40 | 3.0 | 0.35 | 0.4 | 16 | 10 |
| CWT/150 | 0.2 | 30K | 40 | 3.0 | 0.2 | 0.2 | 16 | 10 |
| CWT/300 | 0.1 | 60K | 40 | 3.0 | 0.1 | 0.1 | 16 | 10 |
| CWTHF-抗干扰/高频型号 | ||||||||
| CWTHF/015 | 200 | 30 | 2.0 | 15 | 85 | 150 | 20 | 8 |
| CWTHF/03 | 100 | 60 | 4.0 | 11 | 78 | 105 | 20 | 8 |
| CWTHF/06 | 50 | 120 | 8.0 | 8.0 | 70 | 80 | 20 | 10 |
| CWTHF/1 | 20 | 300 | 20 | 6.0 | 50 | 50 | 20 | 10 |
| CWTHF/3 | 10 | 600 | 40 | 12 | 11 | 12 | 30 | 15 |
| CWTHF/6 | 5.0 | 1.2k | 80 | 12 | 5.5 | 6.0 | 30 | 15 |
| CWTHF/15 | 2.0 | 3.0k | 80 | 10 | 3.0 | 3.0 | 30 | 15 |
| CWTHF/30 | 1.0 | 6.0k | 120 | 10 | 1.5 | 1.5 | 30 | 15 |
| CWTHF/60 | 0.5 | 12k | 120 | 8.0 | 1.0 | 1.0 | 30 | 15 |
| CWTHF/150 | 0.2 | 30k | 120 | 5.0 | 0.8 | 0.8 | 30 | 15 |
| CWTHF/300 | 0.1 | 60k | 120 | 5.0 | 0.2 | 0.2 | 30 | 15 |
| CWTHF/600 | 0.05 | 120k | 120 | 5.0 | 0.06 | 0.05 | 30 | 15 |
| CWTHF/1500 | 0.02 | 300k | 120 | 5.0 | 0.035 | 0.03 | 30 | 15 |
| 型号 | 灵敏度 (mV/A) | 峰值电流 (A) | 峰值di/dt (kA/μs) | 噪声 (mVp-p) | 衰减 (%/ms) | 低频带宽 (-3dB)Hz | 高频带宽 (-3dB)MHz | |
| CWTMini50HF系列 | 100mm线圈 | 200mm线圈 | ||||||
| CWTMini50HF/015 | 200 | 30 | 2.0 | 20 | 85 | 150 | 50 | 36 |
| CWTMini50HF/03 | 100 | 60 | 4.0 | 18 | 78 | 100 | 50 | 36 |
| CWTMini50HF/06 | 50 | 120 | 8.0 | 12 | 70 | 75 | 50 | 36 |
| CWTMini50HF/1 | 20 | 300 | 20 | 10 | 53 | 50 | 50 | 36 |
| CWTMini50HF/3 | 10 | 600 | 40 | 15 | 11 | 12 | 50 | 36 |
| CWTMini50HF/6 | 5.0 | 1.2K | 80 | 15 | 5.5 | 6.0 | 50 | 36 |
| CWTMini50HF/15 | 2.0 | 3.0K | 80 | 12 | 2.8 | 3.0 | 50 | 36 |
| CWTMini50HF/30 | 1.0 | 6.0K | 100 | 12 | 1.5 | 1.5 | 50 | 36 |
| CWTMini50HF/60 | 0.5 | 12.0K | 100 | 10 | 1.0 | 1.0 | 50 | 36 |
| CWTMini50HF/150 | 0.2 | 30.0K | 100 | 8.0 | 1.0 | 1.0 | 50 | 36 |
| CWTMini系列 | ||||||||
| CWTMini/03 | 100 | 60 | 1.0 | 15 | 6.6 | 7.0 | 10 | 5.0 |
| CWTMini/06 | 50 | 120 | 2.0 | 15 | 4.8 | 5.0 | 10 | 5.0 |
| CWTMini/1 | 20 | 300 | 2.5 | 12 | 3.6 | 4.0 | 20 | 15 |
| CWTMini/3 | 10 | 600 | 5.0 | 10 | 1.8 | 2.0 | 20 | 15 |
| CWTMini/6 | 5.0 | 1.2k | 10 | 10 | 0.8 | 0.9 | 20 | 15 |
| CWTMini/15 | 2.0 | 3.0k | 25 | 8.0 | 0.4 | 0.5 | 20 | 15 |
| CWTMini/30 | 1.0 | 6.0k | 40 | 7.0 | 0.25 | 0.3 | 20 | 15 |
| CWTMini/60 | 0.5 | 12k | 40 | 5.0 | 0.2 | 0.2 | 20 | 15 |
| CWTMini/150 | 0.5 | 30k | 40 | 5.0 | 0.1 | 0.1 | 20 | 15 |
| CWTMini/300 | 0.1 | 60k | 40 | 5.0 | 0.05 | 0.05 | 20 | 15 |
| CWTMini/600 | 0.05 | 120k | 40 | 5.0 | 0.03 | 0.02 | 20 | 15 |
| CWTMini/1500 | 0.02 | 300k | 40 | 5.0 | 0.03 | 0.02 | 20 | 15 |
| 型号 | 灵敏度 (mV/A) | 峰值电流 (A) | 噪声 (mVp-p) | 跌落 (%/ms) | LF(-3dB) 带宽Hz | 峰值di dt(A/ns) | HF(-3dB) 带宽MHz |
| CWT UM 015 | 200 | 30 | 20 | 80 | 116 | 2.0 | 30 |
| CWT UM 03 | 100 | 60 | 20 | 65 | 67 | 4.0 | 30 |
| CWT UM 06 | 50 | 120 | 15 | 35 | 34 | 8.0 | 30 |
| CWT UM 1 | 20 | 300 | 15 | 9.0 | 9.2 | 20 | 30 |
| CWT UM 3 | 10 | 600 | 10 | 6.0 | 6.2 | 40 | 30 |
| CWT UM 6 | 5.0 | 1200 | 10 | 3.0 | 3.2 | 70 | 30 |
| CWT UM 15 | 2.0 | 3000 | 5.0 | 2.0 | 2.0 | 70 | 30 |
| CWT UM 30 | 1.0 | 6000 | 5.0 | 2.0 | 2.0 | 70 | 30 |
| 型号 | 灵敏度 (mV/A) | 峰值电流 (kA) | 噪声 (mVp-p) | 跌落 (%/ms) | LF(-3dB) 带宽Hz | 峰值di dt(A/ns) | HF(-3dB)带宽 (MHz)100mm |
| CWT Mini50HF 015 | 200 | 0.03 | 20 | 85 | 150 | 2.0 | 50 |
| CWT Mini50HF 03 | 100 | 0.06 | 18 | 78 | 100 | 4.0 | 50 |
| CWT Mini50HF 06 | 50 | 0.12 | 12 | 70 | 75 | 8.0 | 50 |
| CWT Mini50HF 1 | 20 | 0.3 | 9.0 | 53 | 50 | 20 | 50 |
| CWT Mini50HF 3 | 10 | 0.6 | 15 | 11 | 6.0 | 40 | 50 |
| CWT Mini50HF 6 | 5.0 | 1.2 | 15 | 5.5 | 6.0 | 80 | 50 |
| CWT Mini50HF 15 | 2.0 | 3.0 | 12 | 2.8 | 3.0 | 80 | 50 |
| 型号 | 灵敏度 (mV/A) | 峰值电流 (kA) | di/dt (kA/μs) | 噪声 (mVp-p) | 跌落 (%/ms) | 低频带宽 (3dB)Hz | 高频带宽 (3dB)MHz | |
| 300mm线圈 | 700mm线圈 | |||||||
| CWTHF 015 | 200 | 0.03 | 2.0 | 15 | 85 | 150 | 20 | 8 |
| CWTHF 03 | 100 | 0.06 | 4.0 | 11 | 78 | 105 | 20 | 8 |
| CWTHF 06 | 50 | 0.12 | 8.0 | 8.0 | 70 | 80 | 20 | 10 |
| CWTHF 1 | 20 | 0.3 | 20 | 6.0 | 50 | 50 | 20 | 10 |
| CWTHF 3 | 10 | 0.6 | 40 | 12 | 11 | 12 | 30 | 15 |
| CWT 3N | 10 | 0.6 | 4.0 | 12 | 0.9 | 1.0 | 16 | 10 |
| CWTHF 6 | 5.0 | 1.2 | 80 | 12 | 5.5 | 6.0 | 30 | 15 |
| CWT 6 | 5.0 | 1.2 | 8.0 | 9.0 | 0.9 | 1.0 | 16 | 10 |
| CWTHF 15 | 2.0 | 3.0 | 80 | 10 | 3.0 | 3.0 | 30 | 15 |
| CWT 15 | 2.0 | 3.0 | 20 | 7.0 | 0.7 | 0.8 | 16 | 10 |
| CWTHF 30 | 1.0 | 6.0 | 120 | 10 | 1.5 | 1.5 | 30 | 15 |
| CWT 30 | 1.0 | 6.0 | 40 | 5.0 | 0.5 | 0.6 | 16 | 10 |
| CWTHF 60 | 0.5 | 12 | 120 | 8.0 | 1.0 | 1.0 | 30 | 15 |
| CWT 60 | 0.5 | 12 | 40 | 3.0 | 0.35 | 0.4 | 16 | 10 |
| CWTHF 150 | 0.2 | 30 | 120 | 5.0 | 1.0 | 1.0 | 30 | 15 |
| CWT 150 | 0.2 | 30 | 40 | 3.0 | 0.2 | 0.2 | 16 | 10 |
| CWTHF 300 | 0.1 | 60 | 120 | 5.0 | 0.6 | 0.5 | 30 | 15 |
| CWT 300 | 0.1 | 60 | 40 | 3.0 | 0.1 | 0.1 | 16 | 10 |
| CWTHF 600 | 0.05 | 120 | 120 | 5.0 | 0.6 | 0.5 | 30 | 15 |
| CWT 600 | 0.05 | 120 | 40 | 3.0 | 0.06 | 0.05 | 16 | 10 |
| CWTHF 1500 | 0.02 | 300 | 120 | 5.0 | 0.6 | 0.5 | 30 | 15 |
| CWT 1500 | 0.02 | 300 | 40 | 3.0 | 0.035 | 0.03 | 16 | 10 |
| 型号 | 灵敏度 (mV/A) | 峰值电流(kA) | di/dt (kA/μs) | 噪声 (mVp-p) | 跌落 (%/ms) | 低频带宽 (3dB)Hz | 相位超前 @50Hz(deg) | 高频带宽 (3dB)MHz | |
| Standard Coils标准线固 | 300mm 线圈 | 700mm 线圈 | |||||||
| CWT03LF | 100.0 | 0.06 | 0.4 | 15.0 | 4.6 | 5.1 | 8.3 | 6.5 | 3.0 |
| CWT06LF | 50.0 | 0.12 | 0.8 | 15.0 | 2.3 | 2.6 | 4.2 | 6.5 | 3.0 |
| CWT1LF | 20.0 | 0.3 | 2.0 | 15.0 | 1.0 | 1.0 | 1.8 | 6.5 | 3.0 |
| CWT3LF | 10.0 | 0.6 | 4.0 | 15.0 | 0.5 | 0.55 | 0.85 | 6.5 | 3.0 |
| CWT6LF | 5.0 | 1.2 | 8.0 | 15.0 | 0.25 | 0.27 | 0.45 | 6.5 | 3.0 |
| CWT15LF | 2.0 | 3.0 | 11.0 | 15.0 | 0.1 | 0.11 | 0.18 | 6.5 | 3.0 |
| CWT30LF | 1.0 | 6.0 | 11.0 | 15.0 | 0.05 | 0.055 | 0.09 | 6.5 | 3.0 |
| CWT60LF | 0.5 | 12.0 | 11.0 | 15.0 | 0.025 | 0.022 | 0.045 | 6.5 | 3.0 |
| CWT150LF | 0.2 | 30.0 | 11.0 | 15.0 | 0.01 | 0.011 | 0.018 | 6.5 | 3.0 |
| CWT300LF | 0.1 | 60.0 | 11.0 | 10.0 | 0.007 | 0.008 | 0.012 | 6.5 | 3.0 |
| CWT600LF | 0.05 | 120.0 | 11.0 | 5.0 | 0.007 | 0.008 | 0.012 | 6.5 | 3.0 |
| CWT1500LF | 0.02 | 300.0 | 11.0 | 4.0 | 0.007 | 0.008 | 0.012 | 10.0 | 5.0 |
| Miniature Coils微型线圈 | |||||||||
| CWTO3LF | 100.0 | 0.06 | 0.4 | 16.0 | 10.2 | 11.0 | 18.6 | 5.0 | 4.0 |
| CWT06LF | 50.0 | 0.12 | 0.8 | 16.0 | 5.1 | 5.6 | 9.3 | 12.0 | 7.5 |
| CWT1LF | 20.0 | 0.3 | 2.0 | 15.0 | 2.2 | 2.3 | 4.0 | 12.0 | 7.5 |
| CWT3LF | 10.0 | 0.6 | 4.0 | 15.0 | 1.0 | 1.1 | 1.7 | 12.0 | 7.5 |
| CWT6LF | 5.0 | 1.2 | 8.0 | 15.0 | 0.5 | 0.55 | 0.85 | 12.0 | 7.5 |
| CWT15LF | 2.0 | 3.0 | 14.0 | 15.0 | 0.2 | 0.22 | 0.35 | 12.0 | 7.5 |
| CWT30LF | 1.0 | 6.0 | 14.0 | 15.0 | 0.1 | 0.11 | 0.18 | 12.0 | 7.5 |
| CWT60LF | 0.5 | 12.0 | 14.0 | 15.0 | 0.05 | 0.055 | 0.09 | 12.0 | 7.5 |
| CWT150LF | 0.2 | 30.0 | 14.0 | 15.0 | 0.02 | 0.022 | 0.035 | 12.0 | 7.5 |
| CWT300LF | 0.1 | 60.0 | 14.0 | 15.0 | 0.01 | 0.011 | 0.018 | 12.0 | 7.5 |
| CWT600LF | 0.05 | 120.0 | 14.0 | 10.0 | 0.007 | 0.008 | 0.012 | 12.0 | 7.5 |
