自30多年前率先推出寬帶羅氏電流探頭以來，PEM公司一直在開發(fā)CWT系列，以及現(xiàn)在的屏蔽CWTHF系列，以提供先進的寬帶寬交流電流測量。
英國PEM CWTHF/3羅氏線圈，擴展了CWT系列高頻帶寬，增加了對瞬變大電壓和工頻電壓的抗擾能力。CWT和CWTHF結合了易于使用的薄型、柔性、夾式羅氏線圈，能夠精確復制快速開關電流波形，無論是正弦波形、準正弦波形、PWM波形還是脈沖波形。
一、主要特點
1. 獲得專利的靜電屏蔽線圈，對50/60Hz電壓場和快速電壓瞬變具有出色的抗擾度
2. 型號覆蓋頻率范圍：12Hz到30MHz
3. 額定電流從600Apk
4. 峰值di/dt能力高達40kA/μs
5. 線圈絕緣10kVpk
6. 8.5mm（最大）線圈橫截面直徑
7. 僅以幾個pH值加載到被測電路
8. 標準線圈長度為300毫米至1000毫米，但也有更長的線圈長度可供選擇
二、產(chǎn)品應用
1. 電力電子開關電路中的電流瞬態(tài)測量
2. 雷擊測量
3. 電源轉換器開發(fā)和診斷
4. 高頻(hf)正弦電流，例如感應加熱
5. 在存在大直流電流的情況下測量小交流電流（例如監(jiān)測電容器紋波）
6. 牽引、電機驅動和電力網(wǎng)絡中的EMC測量
7. 測量故障電流或脈沖功率應用中的電流
三、標準與合規(guī)性
1. CE 標志
2. 符合 EMC EN61326-1
3. 符合 IEC 61010-1;IEC 61010-2-032 標準
4. PEM Ltd 已通過 ISO9001：2015 標準認證
5. 專利產(chǎn)品
四、產(chǎn)品尺寸
五、CWT羅氏線圈【舊型號】技術參數(shù)
1. 可根據(jù)要求提供高于300kA峰值電流。
2.“噪聲”是內(nèi)部產(chǎn)生的積分器噪聲，它主要與LF(-3dB)帶寬的頻率相同。
3. 高頻（-3dB)值針對2.5m電纜。
| 型號 | 靈敏度 (mV/A) | 峰值電流 (A) | 峰值di/dt (kA/μs) | 噪聲 (mVp-p) | 衰減 (%/ms) | 低頻帶寬 (-3dB)Hz | 高頻帶寬 (-3dB)MHz | |
| CWT-經(jīng)典款系列 | 300mm線圈 | 700mm線圈 | ||||||
| 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-抗干擾/高頻型號 | ||||||||
| 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 |
| 型號 | 靈敏度 (mV/A) | 峰值電流 (A) | 峰值di/dt (kA/μs) | 噪聲 (mVp-p) | 衰減 (%/ms) | 低頻帶寬 (-3dB)Hz | 高頻帶寬 (-3dB)MHz | |
| CWT-經(jīng)典款系列 | 300mm線圈 | 700mm線圈 | ||||||
| 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-抗干擾/高頻型號 | ||||||||
| 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 |
| 型號 | 靈敏度 (mV/A) | 峰值電流 (A) | 峰值di/ dt(kA/μs) | 噪聲 (mVp-p) | 衰減 (%/ms) | 低頻帶寬 (-3dB)Hz | 高頻帶寬 (-3dB)MHz | |
| CWTMini50HF系列 | 100mm線圈 | 200mm線圈 | ||||||
| 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 |
| 型號 | 靈敏度 (mV/A) | 峰值電流 (A) | 噪聲 (mVp-p) | 衰減 (%/ms) | 低頻帶寬 (-3dB)Hz | 峰值di/dt (kA/μs) | 高頻帶寬 (-3dB)MHz |
| CWTUM-S/015 | 200 | 30 | 20 | 85 | 150 | 2.0 | 30 |
| CWTUM-S/03 | 100 | 60 | 18 | 78 | 100 | 4.0 | 30 |
| CWTUM-S/06 | 50 | 120 | 12 | 70 | 75 | 8.0 | 30 |
| CWTUM-S/1 | 20 | 300 | 10 | 53 | 50 | 20 | 30 |
| CWTUM-S/3 | 10 | 600 | 12 | 11 | 12 | 40 | 30 |
| CWTUM-S/6 | 5.0 | 1.2k | 12 | 5.5 | 6.0 | 80 | 30 |
| CWTUM-S/15 | 2.0 | 3.0k | 10 | 2.8 | 3.0 | 100 | 30 |
| CWTUM-S/30 | 1.0 | 6.0k | 10 | 1.5 | 1.5 | 100 | 30 |
| CWTUM-S/60 | 0.5 | 12.0k | 8.0 | 1.0 | 1.0 | 100 | 30 |
| CWTUM-S/150 | 0.2 | 30.0k | 5.0 | 1.0 | 1.0 | 100 | 30 |
| 型號 | 靈敏度 (mV/A) | 峰值電流 (A) | 峰值di/dt (kA/μs) | 噪聲 (mVp-p) | 衰減 (%/ms) | 低頻帶寬 (-3dB)Hz | 高頻帶寬 (-3dB)MHz |
| CWTUM-F(1.3mm厚度) | 55mm線長 | ||||||
| CWTUM-F/03 | 100 | 60 | 4.0 | 20 | 85 | 150 | 20 |
| CWTUM-F/06 | 50 | 120 | 8.0 | 15 | 78 | 100 | 20 |
| CWTUM-F/1 | 20 | 300 | 20 | 15 | 53 | 50 | 20 |
| CWTUM-F/3 | 10 | 600 | 40 | 15 | 19 | 20 | 20 |
| CWTUM-F/6 | 5.0 | 1.2k | 80 | 15 | 9.3 | 10 | 20 |
| CWTUM-F/15 | 2.0 | 3.0k | 100 | 12 | 4.6 | 5.0 | 20 |
| CWTUM-F/30 | 1.0 | 6.0k | 100 | 12 | 2.4 | 2.6 | 20 |
| CWTUM-F/60 | 0.5 | 12.0k | 100 | 12 | 1.2 | 1.2 | 20 |
| CWTUMHF-F(抗干擾/高頻型號-1.7mm厚度) | 55mm線長 | ||||||
| CWTUMHF-F/03 | 100 | 60 | 4.0 | 20 | 85 | 150 | 30 |
| CWTUMHF-F/06 | 50 | 120 | 8.0 | 15 | 78 | 100 | 30 |
| CWTUMHF-F/1 | 20 | 300 | 20 | 15 | 53 | 50 | 30 |
| CWTUMHF-F/3 | 10 | 600 | 40 | 15 | 19 | 20 | 30 |
| CWTUMHF-F/6 | 5.0 | 1.2k | 80 | 15 | 9.3 | 10 | 30 |
| CWTUMHF-F/15 | 2.0 | 3.0k | 100 | 12 | 4.6 | 5.0 | 30 |
| CWTUMHF-F/30 | 1.0 | 6.0k | 100 | 12 | 2.4 | 2.6 | 30 |
| CWTUMHF-F/60 | 0.5 | 12.0k | 100 | 12 | 1.2 | 1.2 | 30 |
| 型號 | 靈敏度 (mV/A) | 峰值電流 (A) | 噪聲 (mVp-p) | 跌落 (%/ms) | 低頻帶寬 (-3dB)Hz | 峰值di/dt (kA/μs) | 高頻帶寬 (-3dB)MHz |
| CWTUM/015 | 200 | 30 | 20 | 80 | 116 | 2.0 | 30 |
| CWTUM/03 | 100 | 60 | 20 | 65 | 67 | 4.0 | 30 |
| CWTUM/06 | 50 | 120 | 15 | 35 | 34 | 8.0 | 30 |
| CWTUM/1 | 20 | 300 | 15 | 9.0 | 9.2 | 20 | 30 |
| CWTUM/3 | 10 | 600 | 10 | 6.0 | 6.2 | 40 | 30 |
| CWTUM/6 | 5.0 | 1.2k | 10 | 3.0 | 3.2 | 70 | 30 |
| CWTUM/15 | 2.0 | 3.0k | 5.0 | 2.0 | 2.0 | 70 | 30 |
| CWTUM/30 | 1.0 | 6.0k | 5.0 | 1.5 | 1.5 | 70 | 30 |
| CWTUM/60 | 0.5 | 12.0k | 5.0 | 1.0 | 1.0 | 100 | 30 |
| CWTUM/150 | 0.2 | 30.0k | 5.0 | 1.0 | 1.0 | 100 | 30 |
| 型號 | 靈敏度 (mV/A) | 峰值電流 (A) | 噪聲 (mVp-p) | 衰減 (%/ms) | 低頻帶寬 (-3dB)Hz | 峰值di/dt (kA/μs) | 高頻帶寬 (-3dB)MHz | |
| 300mm線圈 | 700mm線圈 | |||||||
| CWTLF/1 | 20 | 300 | 15 | 0.47 | 0.5 | 2.5 | 1.6 | 0.75 |
| CWTLF/3 | 10 | 600 | 15 | 0.24 | 0.25 | 5.0 | 1.6 | 0.75 |
| CWTLF/6 | 5.0 | 1.2k | 15 | 0.19 | 0.2 | 10 | 1.6 | 0.75 |
| CWTLF/15 | 2.0 | 3.0k | 15 | 0.09 | 0.1 | 11 | 1.6 | 0.75 |
| CWTLF/30 | 1.0 | 6.0k | 15 | 0.045 | 0.05 | 11 | 1.6 | 0.75 |
| CWTLF/60 | 0.5 | 12.0k | 15 | 0.018 | 0.02 | 11 | 1.6 | 0.75 |
| CWTLF/150 | 0.2 | 30.0k | 15 | 0.009 | 0.01 | 20 | 3.2 | 1.5 |
| CWTLF/300 | 0.1 | 60.0k | 10 | 0.007 | 0.008 | 20 | 3.2 | 1.5 |
| CWTLF/600 | 0.05 | 120.0k | 5.0 | 0.007 | 0.008 | 20 | 3.2 | 1.5 |
| CWTLF/1500 | 0.02 | 300.0k | 4.0 | 0.007 | 0.008 | 20 | 3.2 | 1.5 |
