Kyoritsu 3124 10kV High Voltage Insulation Tester
The Kyoritsu 3124 (also referred to as KEW 3124A) is a portable high-voltage insulation tester designed for heavy-duty electrical maintenance and servicing tasks. It allows technicians to assess insulation resistance up to 100 GΩ by applying a variable DC test voltage from 1 kV to 10 kV. This makes it suitable for verifying insulation integrity in industrial installations, cables, switchgear, transformers, generators, motors, and other high-voltage equipment. The device is housed in a rugged case with a clear digital display indicating both set voltage and measured resistance, enabling reliable field use.
Operation is via rechargeable Nickel-Cadmium (or Nickel-Metal Hydride in some versions) batteries, ensuring portability even in remote locations. The instrument features autoranging resistance measurement, automatically selecting ranges to cover from low megohm levels up to 100 GΩ without manual scale changes. During testing, the output voltage is shown on the display, and after completion, the built-in auto-discharge function safely releases any stored charge in the test object. A DC voltage output terminal allows connection to chart recorders or data loggers for trend analysis or permanent records.
Ergonomically designed controls and color-coded indicators guide the user through voltage selection and test initiation. Safety features include a warning to confirm no residual voltage before connection, and automatic discharge after test. The compact dimensions (200 × 140 × 80 mm) and weight (~1.5 kg) make it easy to carry. The robust construction withstands field conditions, while clear guidelines in the instruction manual emphasize safe handling of high-voltage measurements.
Features:
- Permits insulation resistance testing up to 100 GΩ at variable DC test voltage from 1 kV to 10 kV.
- Autoranging resistance measurement covering low megohm to 100 GΩ without manual scale changes.
- Digital display shows set voltage, output voltage, and measured resistance.
- DC voltage output terminal for chart recorders or data loggers.
- Automatic discharge of stored charge after test completion.
- Operated by rechargeable Nickel-Cadmium (or Ni-MH) batteries for portable field operation.
- Compact, lightweight, and rugged construction suitable for industrial environments.
- Clear, ergonomic controls with color-coded indicators for ease of use.
- Safety guidance in manual for high-voltage detection and proper handling.
Specifications:
| Parameter | Details |
|---|---|
| DC Test Voltage: | 1 kV to 10 kV variable; plus 1000 V range |
| Measuring Ranges: | 1000 V: 1 MΩ to 100 MΩ; 1 kV–10 kV: 0.05 GΩ to 50 GΩ (first effective), autoranging up to 100 GΩ |
| Resistance Accuracy: | ±10% of reading (typical for effective ranges); other ranges ±1% of scale length |
| Voltage Output Accuracy: | DC 0–10 kV: ±2% of reading ±2 digits |
| Output Voltage Indication: | Digital display shows set and actual output voltage |
| Auto-discharge: | Built-in automatic discharge after test |
| DC Output Terminal: | Provided for connection to external recorder |
| Power Source: | Rechargeable Ni-Cd (or Ni-MH) batteries (8×1.2 V cells) |
| Battery Charger: | Charger suited to regional mains (e.g., 120 V or 220 V versions) |
| Dimensions: | 200 mm (L) × 140 mm (W) × 80 mm (D) |
| Weight: | 1.5 kg (including batteries) |
| Withstand Voltage (instrument body): | Designed per safety standards for 10 kV output testing |
| Accessories: | Test leads, earth and guard leads, charger lead, carrying case, instruction manual |
Applications:
- Industrial electrical maintenance.
- Cable insulation testing.
- Transformer insulation verification.
- Generator and motor insulation assessment.
- Switchgear and control panel testing.
- Field service diagnostics for high-voltage equipment.
- Preventive maintenance in power utilities.
- Quality control during equipment installation.
Package Contents:
- 1x Main unit (High Voltage Insulation Tester)
- 1x Test leads (high-voltage probe lead and return lead)
- 1x Earth and guard leads
- 1x Battery charger cable/lead
- 1x Rechargeable battery pack (pre-installed or separate)
- 1x Carrying case (hard case)
- 1x Instruction manual
- 1x Calibration certificate (if provided)
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