Refine On (Hebei) Electric Power Technology Co., Ltd. is one of the leading manufacturers and suppliers of smart dc high voltage tester in China. If you're going to wholesale durable smart dc high voltage tester, welcome to get quotation from our factory. All customized products are with high quality and competitive price.
The NRG60Z/80Z/ 100Z/120Z Smart DC High Voltage Tester generates a negative polarity DC high voltage with an output ripple factor <0.5%. It integrates overvoltage protection, overcurrent protection, open-circuit protection, non-zero start protection, ground detection, and overload protection. The unit supports wireless anti-shock ammeter data transmission and is suitable for field and laboratory insulation testing on capacitive and resistive loads.
Product Parameters
1. Model Specifications (Control Unit & HV Unit)
|
Model |
Rated Voltage |
Rated Current |
Control Unit Dimensions (mm) |
Control Unit Weight |
HV Unit Dimensions (mm) |
HV Unit Weight |
|
NRG60Z |
60 kV |
2-10 mA |
345×250×235 |
6.5 kg |
164×90×420 |
5 kg |
|
NRG80Z |
80 kV |
2-10 mA |
345×250×235 |
6.5 kg |
164×90×420 |
5 kg |
|
NRG100Z |
100 kV |
2-10 mA |
345×250×235 |
6.5 kg |
164×90×510 |
5 kg |
|
NRG120Z |
120 kV |
2-10 mA |
340×250×235 |
6.5 kg |
164×90×560 |
5.7 kg |
Note: HV unit dimensions = pressure equalizing cover diameter (R) × insulation barrel diameter (r) × total height (H)
2. Common Technical Parameters
|
Parameter |
Value |
|
Polarity |
Negative |
|
Maximum output |
1.1 × rated voltage |
|
Output ripple factor |
<0.5% |
|
Operating power supply |
Single-phase AC 165V–245V, 50-60 Hz |
|
Host voltage measurement accuracy |
±0.5% ±2 digits, resolution 0.01 kV, max display 99999 |
|
Host current measurement accuracy |
±0.5% ±2 digits, resolution 0.1 µA, max display 99999 |
|
Wireless anti-shock ammeter accuracy |
±0.5% ±2 digits, resolution 0.1 µA, max display 9999 |
|
Wireless ammeter range (factory standard) |
0-5 mA (options: 0-10 mA, 0-20 mA) |
|
Resistance display range |
60 kV: 60 GΩ; 100 kV: 100 GΩ; 120 kV: 120 GΩ |
|
Working mode |
Intermittent, max 30 minutes |
|
Voltage stability |
≤0.5% when grid voltage varies by ±10% |
|
Operating temperature |
-10℃ to 40℃ |
|
Operating humidity |
<90% |
|
Storage temperature |
-20℃ to 50℃ |
|
Storage humidity |
<95% |
|
Altitude |
≤3000 m |
Key Advantages
- Measurement precision: Voltage and current accuracy ±0.5% ±2 digits, with 0.01 kV and 0.1 µA resolution respectively. Resistance display up to 120 GΩ (for 120 kV model).
- Protection features: Overvoltage, overcurrent, open-circuit, non-zero start, ground detection, and overload protection. Dual grounding (internal control cable ground + external panel terminal) ensures operator safety.
- Data handling: Stores up to 200 test records. USB export (FAT32, ≤32 GB) generates TXT tables. Embedded micro-printer for on-site recording. RS232/485 isolated interface (1000 VDC isolation) supports remote control.
- Wireless current measurement: Anti-shock ammeter transmits data to the host, eliminating cable shielding leakage current (<5 µA at 200 kV with 50 cm air gap).
- Step voltage control: 7 selectable steps – for ≤160 kV units: 0.05, 0.1, 0.2, 0.5, 1.0, 2.0, 5.0 kV.
- Capacitive load optimization: Automatic voltage regulation prevents overcurrent interruptions during cable or capacitor testing.
- HV unit construction: Solid encapsulation with DuPont materials; no air or oil insulation issues.
Applications
• DC withstand voltage testing on power cables, capacitors, and rotating machinery.
• Leakage current measurement and MOA (zinc oxide arrester) automatic testing.
• Preventive insulation testing in power generation, transmission, substations, and industrial facilities.
Related Products
Factory Show
FAQ
Q1: What is the maximum output voltage of the Smart DC High Voltage Tester?
A1: For the NRG120Z model, the rated output is 120 kV DC, with an over-range capability of 1.1× rated voltage (132 kV). The maximum output varies by model as listed in Section 3.1.
Q2: How does the wireless anti-shock ammeter improve measurement accuracy?
A2: The ammeter transmits current data directly to the host, eliminating leakage current from the high-voltage cable shielding layer. At 200 kV DC, with a 50 cm air gap, cable leakage current is <5 µA, ensuring that only the test object current is measured.
Q3: Can the Smart DC High Voltage Tester automatically test MOA arresters?
A3: Yes. In MOA mode, the unit automatically raises voltage to the 1 mA reference point, holds for 3 seconds, then reduces to 75% of that voltage and records the result. The test voltage should be set 10% higher than the expected 1 mA voltage, with overvoltage protection at least 2 kV above the test voltage.
Q4: What happens if the ground connection is poor?
A4: The instrument displays a ground fault warning. While high voltage output is still possible, the warning indicates potential chassis electrification. Dual grounding (internal cable ground + external terminal) provides redundancy, but proper grounding must be verified before use.
Hot Tags: smart dc high voltage tester, China smart dc high voltage tester manufacturers, suppliers, factory
