North Star High Voltage
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North Star High Voltage
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Brand: North Star High Voltage
Origin: USA
Ultra-high voltage divider — VD series is mainly used for testing ultra-high voltages and in scenarios where extremely stable physical characteristics are required.
North Star / Polar Star VD series ultra-high voltage dividers are vertical ultra-high voltage probes,
with a range of DC~70 - 400kV (pulse voltage 550kV), an accuracy of up to 1%, and a VD series division ratio of 10,000:1.
At the same time, the VD series ultra-high voltage sensor probes use resistors with extremely low voltage dependence and capacitors that are extremely stable with respect to temperature, frequency, and voltage.
All North Star VD series high-voltage probes use patented technology to minimize neighboring effects (stray capacitance) while maximizing the consistency and stability of testing.
Both high-frequency and low-frequency tests of the VD high-voltage probes are precisely calibrated. The cables are also finely compensated, so even when the cable length exceeds the period of the pulse being measured, accurate measurements can still be achieved.
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| Project | VD-70 | VD-100 | VD-150 | VD-200 | VD-300 | VD-400 |
| Maximum DC/Pulse Voltage (kV) | 70/115 | 100/160 | 150/230 | 200/300 | 300/420 | 400/550 |
| Maximum AC RMS value (KV) | 50 | 72 | 108 | 142 | 216 | 290 |
| Maximum Frequency (MHz) | 25 | 20 | 20 | 16 | 12 | 8 |
| Fastest rise time (ns) | 14 | 17.5 | 17.5 | 22 | 30 | 44 |
| Cable Length (ft./m) | 30 | 30 | 30 | 30 | 30 | 30 |
| DCaccuracy | ||||||
| 10Hz-1MHz.accuracy | 1% | 1% | 1% | 2% | 2.5% | 3% |
| >1MHz.accuracy | 3% | 3% | 3% | 3% | 4% | 4% |
| input impedance (Megohms) | 800 | 1600 | 2000 | 2800 | 5100 or2550 |
6800 or3400 |
| Height (inches/cm.) | 20/50 | 24/60 | 30/75 | 35/88 | 54/135 | 72/180 |
| Diameter (in/cm.) | 11/28 | 11/28 | 12/29 | 20/50 | 24/61 | 24/61 |
| Capacitance (approx. pF) | 24 | 25 | 27 | 24 | 30 | 30 |
| Base diameter (in/cm) | 10/25 | 10/25 | 12/30 | 12/30 | 28/72 | 28/72 |
| Standard pressure ratio | 10000:1 | 10000:1 | 10000:1 | 10000:1 | 10000:1 | 10000:1 |