America VD-B特高压分压器
特高压分压器——VD系列主要用于超高电压的测试，且对物理特性要求J其稳定的场景来应用。
North Star/ 北极星 VD系列特高压分压器是North star 在平地上测试J高电压的电压探头，主要适用于日复一日的高负荷应用。同时VD系列有着J其广泛应用范围：电视显像管的制造、雷达、粒子加速应用等。
同时，特高压传感器 VD系列的电探头采用J低的电压阻抗系数的电阻，以及对温度、频率和电压J其稳定的电容。
所有探头采用标准的字段限定环形，保证邻近效应(杂散电容)Z小化，同时最大限度的保证测试的一致性和稳定性。
探头的高频与低频的测试，都经过了精密的校准。甚高频的线缆也经过精细的补偿，从而使得线缆长度超过所测的脉冲周期，也可以实现精确的测量。当然，所有的设备都不需要任何的校准。
应用领域
VD系列设计用于超高电压以及对稳定度要求非常高的测试领域。该VD系列的高压探头可测量高到400KV的电压，VD系列的电探头采用很低的电压阻抗系数的电阻，以及对温度、频率和电压J其稳定的电容。
所有探头采用标准的字段限定环形，保证邻近效应(杂散电容)最小化，同时最大限度的保证测试的一致性和稳定性。
探头的高频与低频的测试，都经过了精密的校准。甚高频的线缆也经过精细的补偿，从而使得线缆长度超过所测的脉冲周期，也可以实现精确的测量。当然，大部分的设备几乎不需要校准。
Upgraded "bare" versions of our probes for space-saving installation into oil (or SF6) tanks are now available. These probes are similar to the VD series probes with somewhat lower accuracy at a somewhat lower cost. When installing these probes some information about the surrounding areas is required. The length of a VD-120 bare probe (120 kV) is 0.35 m. These units are threaded and can therefore be stacked into higher voltage units. The VD-60 and VD-120 are offered at 60 kV and 120 kV respectively. The bare probes are now available for use in air, but only at 60 and 1120 kV sizes.
Combinations at 180 kV, 240 kV, 300 kV and 360 kV can readily be created. 10,000:1 ratios are typical but other ratios are can be provided. Shielded probes or unshielded probes can be provided. Typical accuracy is 1 % DC and 1.5 % AC.
Bare probes are designed for use in equipment or in areas where the measurement conditions are well understood, the measurement is primarily DC, or there is not a conductor close by. They are designed with higher capacitance for minimization of stray capacitive effects without the use of shielding toroids. Shielding toroids can also be provided for very precise, built in measurements. The probes are long enough for use in air with appropriate electrodes, and can also be used in oil or SF6 gas. The probes have applications ranging from pulse modulator in-situ measurements to implantation equipment to excimer laser system measurements. They are factory calibrated, and they do not require adjustment when installed. They can be provided for use with various measurement instruments such as 10 Megohm meters and 1 megohm oscilloscopes, and various digitizers. The new rugged encapsulated design allows multiples of the VD-60B and VD-120B basic units to be coupled together for higher voltages.
|
Model Number |
VD-60B |
VD-120B |
VD-180B |
VD-240B |
VD-300B |
|
Max DC/Pulsed V (kV) |
60/80 |
120/160 |
180/240 |
240/300 |
300/360 |
|
Max Frequency (Mhz.) |
15 |
15 |
10 |
8 |
6 |
|
Cable Impedance (ohms) |
50 ohm standard or customer specified |
||||
|
DC - 2 Hz.accuracy |
<1% |
<1% |
<1% |
<1% |
<1% |
|
2 Hz. - 200 Hz. accuracy |
<2 % |
<2 % |
<2 % |
<2 % |
<3 % |
|
200 Hz. - 1 Mhz. accuracy |
<2.5 % |
<2.5 % |
<3 % |
<3 % |
<3.5 % |
|
> 1 Mhz. Accuracy |
<3 % |
<3 % |
<4 % |
<4 % |
<5 % |
|
Input R/C (Megohm/pf) |
800/38 |
1600/19 |
2400/13 |
Sep-00 |
Aug-00 |
|
Cable Length (ft./m) |
30/9 |
30/9 |
30/9 |
30/9 |
30/9 |
|
Standard Divider Ratio |
10,000:1 |
10,000:1 |
10,000:1 |
10,000:1 |
10,000:1 |
|
Length (inches/cm.) |
6.9/17.5 |
12.9/32.8 |
19.8/60.3 |
25.8/65.6 |
32.7/83.1 |
