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Trụ sở chính: Số 10, dãy F10 TTĐH Bách Khoa, P.Bách Khoa, Q. Hai Bà Trưng, HN
VPGD :104 K18 TTĐH Bách Khoa, Nguyễn Hiền, Hai Bà Trưng, Hà Nội
ĐẠI DIỆN PHÂN PHỐI CÁC THIẾT BỊ ĐIỆN CÔNG NGHIỆP - ĐIỆN TỰ ĐỘNG HÓA CỦA TẬP ĐOÀN SCHNEIDER ELECTRIC TẠI VIỆT NAM
BÊN CẠNH ĐÓ SƠN THỊNH CÒN PHÂN PHỐI CÁC THIẾT BỊ ĐO KYORITSU/JAPAN
Mọi Sản phẩm bảo hành 12 tháng với đầy đủ giấy tờ xuất xứ nguồn gốc ( CO, CQ )
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Vui lòng liên hệ trực tiếp để có giá tốt nhất :
Phòng kinh doanh: Mr. Bình 04.66.844.622-0983974562
mail : kinhdoanh3@vnautomation.com
Yahoo : schneider.sonthinh
![](http://www.kew-ltd.co.jp/en/common_img/midashi_head.gif) | Earth Clamp Tester |
![MODEL](http://www.kew-ltd.co.jp/en/common_img/model_head.gif) | 4200 |
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• | The earth resistance from 0.05 to 1200Ω can be measured without the auxiliary earth spikes. (The Multiple Earthing System.) | • | True RMS Accurate true RMS readings of AC current including distorted waveform from 1mA to 30.0A | • | Noise Check Function A function to detect current, which effects on an earth resistance measurement and display "NOISE" mark on the LCD. | • | Memory function Save and display up to 100 measurement data. | • | Data hold function / Buzzer function / Back light function | • | Compliant with Safety Standards of IEC 61010-1 : CAT.IV 300V Pollution degree2 | | Note: A single earthing can not be measured. (Only for Multiple Earthing System) |
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![4200](http://www.kew-ltd.co.jp/en/products/earth/images/4200.jpg)
![CE](http://www.kew-ltd.co.jp/en/products/images/ce.gif)
![](http://www.kew-ltd.co.jp/en/products/earth/images/4200_B.jpg) |
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![](http://www.kew-ltd.co.jp/en/common_img/spacer.gif) |
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Function | Range | Resolution | Measuring range | Accuracy | Earth resistance Auto range | 20Ω | 0.01Ω* | 0.00~20.99Ω | |±1.5%±0.05Ω | 200Ω | 0.1Ω | 16.0~99.9Ω | |±2%±0.5Ω | 100.0~209.9Ω | |±3%±2Ω | 1200Ω | 1Ω | 160~399Ω | |±5%±5Ω | 400~599Ω | |±10%±10Ω | 10Ω | 600~1260Ω | --- | AC current (50Hz / 60Hz) Auto range | 100mA | 0.1mA | 0.0~104.9mA | |±2%±0.7mA | 1000mA | 1mA | 80~1049mA | |±2% | 10A | 0.01A | 0.80~10.49A | 30A | 0.1A | 8.0~31.5A | Operating system |
Earth resistance function : | Constant voltage injection, Current detection, (Frequency : Approx.2400Hz) Dual Integration | AC current function : | Successive Approximation |
| Over-range indication | "OL" is displayed when input exceeds the upper limit of a measuring range | Response time | Approx.7 seconds (Earth resistance) Approx.2 seconds (AC current) | Sample rate | Approx. 1 times per second | Power source | DC6V : R6P (sizeAA manganese battery) × 4pcs, or LR6 (sizeAA alkaline battery) × 4pcs | Current consumption | Approx. 50mA (max. 100mA) | Measurement time | Approx. 12 hours (when R6P is used) Approx. 24 hours (when LR6 is used) | Auto power-off | Turns power off about 10 minutes after the last button operation. | Applicable standards | IEC 61010-1 : 2001 (CAT.IV 300V Pollution degree2) | Withstand voltage | AC5320Vrms / 5 seconds Between the Transformer jaws fitted parts and Case enclosure (except for jaws) | Conductor size | Approx. 32mm max. | Dimension | 246(L) × 120(W) × 54(D)mm | Weight | Approx. 780g (including batteries) | Accessories | Battery R6P : 4pcs Instruction manual : 1pc 8304 (Resister for operation check : 1pc) 9128 (Hard case : 1pc) |
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•Crest factor < 3 (50Hz / 60Hz, peak value shall not exceed 60A) *4 counts or less are corrected to 0. |
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![](http://www.kew-ltd.co.jp/en/products/images/pink.gif) | ![](http://www.kew-ltd.co.jp/en/common_img/spacer.gif) | Why earth resistance can be found by only clamping it? |
Rx, is defined as earth resistance under test, and R1, R2...Rn are defined as earth resistance of other measuring objects. | ![](http://www.kew-ltd.co.jp/en/products/earth/images/4200_ill_01.gif) |
These earth resistances, R1, R2, Rn can be considered that they are connected in parallel. And they can be regarded as a combined resistance Rs. The Rs can be regarded small enough against Rx since a combined resistance consists of several resistances. Following is an equivalent circuit diagram of this circuit.
| ![](http://www.kew-ltd.co.jp/en/products/earth/images/4200_ill_02.gif) |
Voltage V is applied to the object (Resistance Rx) measured from the voltage injection transformer CT1, and the current I corresponding to the earth resistance is flowed. The current I is detected with detection transformer CT2, and object (Resistance Rx) measured can be put out by the calculation. (refer to the right diagram) | ![](http://www.kew-ltd.co.jp/en/products/earth/images/4200_ill_05.gif) |
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