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NDPDF Series DC System Insulation Monitoring Device
NDPDF Series DC System Insulation Monitoring Device

MengziNDPDF Series DC System Insulation Monitoring Device

Category:

MengziBattery and DC System Testing Series

Phone: 0512-66101666

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Product Description

■ Features and Benefits

  1. Insulation monitoring devices or portable ground-fault locators can be calibrated online or offline.
  2. The device is equipped with a positive‑grounding test function, enabling verification of the accuracy of both the positive‑grounding test and the positive‑grounding alarm.
  3. The device is equipped with a negative‑grounding test function, enabling verification of both the accuracy of the negative‑grounding test and the accuracy of the negative‑grounding alarm for the device under test.
  4. The device features a two-pole grounding test function, enabling verification of the tested equipment’s two-pole grounding performance and assessment of the accuracy of its two-pole grounding alarm.
  5. The device features voltage‑accuracy testing capabilities and incorporates an adjustable DC voltage source. Users can configure multiple test points to evaluate the voltage measurement accuracy of the device under test.
  6. The device is equipped with an AC‑injection test function, enabling verification of the AC‑injection detection capability of the device under test.
  7. The device features a system‑wide distributed capacitance testing capability, allowing users to configure and set the positive‑to‑ground impedance, negative‑to‑ground impedance, positive‑to‑ground distributed capacitance, and negative‑to‑ground distributed capacitance.
  8. The device features branch‑level testing for distributed capacitance, allowing users to configure and set the positive‑to‑ground impedance, negative‑to‑ground impedance, positive‑to‑ground distributed capacitance, and negative‑to‑ground distributed capacitance of each branch.
  9. The device features signal analysis capabilities; for equipment that requires signal‑based ground‑fault detection, this function enables the analysis of parameters such as signal amplitude, frequency, and power of the device under test.
  10. The device features an electrical bridge safety‑check function, which enables users to determine whether the bridge is safe by comparing the ratio of the measured device’s negative-to-ground voltage to its positive-to-ground voltage.
  11. The device features DC cross‑connection and DC ring‑closing test functions; users can configure various types of DC cross‑connection or ring‑closing scenarios to verify the tested device’s DC cross‑connection and ring‑closing detection capabilities.
  12. The device features a branch‑line selection test function, allowing users to configure combinations of positive‑pole ground impedance, negative‑pole ground impedance, system distributed capacitance, and branch‑line distributed capacitance, and to input the results of branch‑line selection.
  13. The device features a false‑trip test function, allowing users to configure combinations of insulation resistance, bridge resistance, system distributed capacitance, and branch‑circuit distributed capacitance to verify the false‑trip detection capability of the device under test.
  14. Test portable ground-fault location products and conduct safety assessments;
  15. The measurement displays and saves the waveform of ground‑reference voltage variations.
  16. Capable of conducting on-site analysis and testing of protection maloperations caused by ground faults in DC systems.
  17. It can generate and export test reports and save test data.

■ Main Technical Specifications

  1. Operating environment
    1. Power supply: AC 220 V ±15%
    2. Ambient temperature: -20℃ to 45℃
    3. Relative humidity: 5–90%
  2. DC power supply
    1. DC power output: 20–260 V, adjustable
    2. The maximum output current is 1.2 A.
    3. Internal Power Supply: Provides two independent output channels.
    4. Ripple factor: ≤1%
  3. AC Power Parameters
    1. Output voltage levels: AC 50 V / 110 V / 220 V; maximum output current: 500 mA.
  4. DC Voltage Measurement
    1. DC voltage measurement resolution: 0.1 V
    2. Voltage measurement accuracy: ≤0.5%
  5. Positive and negative electrode insulation resistance parameters
    1. Adjustable range of insulation resistance for positive and negative electrodes: 0–1000 kΩ.
    2. Positive and negative electrode insulation resistance adjustment step size: 1 kΩ
    3. Accuracy: ≤±0.5%
    4. Insulation Resistance: Provides two independent positive and negative insulation resistance channels.
  6. Distribution capacitance parameters of the branch’s positive and negative terminals with respect to ground
    1. Adjustable range of the distributed capacitance for the positive and negative terminals of the branch: 0–30 µF
    2. Step size for adjusting the distributed capacitance of the branch’s positive and negative terminals: 1 µF
    3. Accuracy: ≤±5%
  7. System positive and negative terminal-to-ground distributed capacitance parameters
    1. Adjustable range of the system’s positive and negative electrode distributed capacitance: 0–150 µF.
    2. System positive and negative electrode distributed capacitance adjustment step size: 10 µF
    3. Accuracy: ≤±5%
  8. Signal Comprehensive Test Parameters

a) Signal amplitude: 10–110 V

  1. Signal frequency: 0.24 Hz–49.9 Hz
  1. Display and Touchscreen Specifications
    1. Display size: 7-inch TFT
    2. Display resolution: 65,536 colors, 800×480
    3. Touchscreen resolution: 4096 points
  2. Dimensions: 426 × 194 × 414 mm (Length × Height × Width)
  3. Weight: 13 kg

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