Megger DCM300E Earth leakage clamp meter
- 0.01 mA best measurement resolution
- Four ranges: 30 mA, 300 mA, 30 A, 300 A
- 40 mm maximum jaw opening size
- Dual analogue bargraph/digital LCD display
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Description
Precision Tool for Earth Leakage Detection Excellence
The Megger DCM300E Earth Leakage Clamp Meter stands as an industry leader in detecting and measuring earth leakage currents. Designed primarily for inspecting leakage currents in electrical installations, the DCM300E is an essential instrument for electricians, maintenance engineers, and technical service professionals. Its high precision, with a best resolution of 0.01 mA, lets users identify even the smallest leakage currents that might otherwise go unnoticed and potentially cause nuisance tripping or electrical hazards. Unlike traditional multimeters, which may require circuit disassembly for current checks, the DCM300E offers a simple clamp-on operation, streamlining the diagnostic process for live circuits and complex installations. Its compact, lightweight build ensures it easily fits into a professional’s toolkit, while its rugged design assures long-term reliability even in demanding work environments.
Dedicated Ranges Enhance Measurement Versatility
A notable strength of the DCM300E lies in its versatile measurement ranges. The instrument features four dedicated ranges: 30 mA, 300 mA, 30 A, and 300 A, giving users the flexibility to measure everything from minute leakage currents to high-load AC currents. This wide range means the clamp meter is suitable not only for detecting leakage currents but also for broader current measurement applications in industrial, commercial, and domestic installations. For instance, in situations where a Residual Current Device (RCD) or Ground Fault Circuit Interrupter (GFCI) is repeatedly tripping, the DCM300E can quickly determine whether a high leakage current is present or if the protection device itself is faulty. The minimum resolution of 0.01 mA on the sensitive 30 mA range is particularly advantageous for troubleshooting insulation failures, deteriorated cables, and damp conditions in distribution panels.
Real-Time Monitoring with Dual Display Technology
The DCM300E enhances user experience with its dual display technology, featuring both an analogue-style bar graph and a high-contrast digital LCD. The analogue bar graph allows users to observe rapidly fluctuating currents, making it ideal for trend monitoring and identifying intermittent faults that a digital reading might miss. With a 3.5-digit LCD and a maximum reading of 3200 digits, users gain a precise numerical representation of the measured current. The combination of analogue and digital displays offers intuitive, reliable readings in all lighting conditions, supported by the instrument’s data hold function for recording measurements in hard-to-access or poorly lit locations. These features simplify testing processes, save valuable time during diagnostics, and reduce the likelihood of errors during critical safety work.
Safety Features That Surpass International Standards
Safety is at the core of the Megger DCM300E’s design. The clamp meter fully complies with the latest international safety standards, including EN61010-1 and EN61010-2-032, which are mandatory for modern electrical test equipment. The instrument offers CAT III 300 V, 500 V phase-to-phase, and CAT II 600 V protection, providing robust insulation barriers for both the operator and the equipment. Its jaw construction incorporates extra insulation to prevent accidental short circuits between live conductors, while the tactile barrier and handguard further shield users from accidental contact and electric shock. With a withstanding voltage of up to 3700 V and EMC compliance (IEC61326), the DCM300E promises safe operation and reliable performance in the presence of electromagnetic disturbances.
Applications: Essential for Every Electrical Industry Professional
The Megger DCM300E is purpose-built for applications demanding the highest levels of precision and safety in current measurement. In residential, industrial, and commercial settings, it excels in diagnosing earth leakage that may be triggered by deteriorated cable insulation, water ingress, or damaged terminal fittings. It simplifies RCD and GFCI troubleshooting, enabling technicians to distinguish between excessive leakage and faulty protection devices without dismantling complex circuits. The clamp meter’s compact size makes it ideal for use in confined switchboards and crowded panel spaces, supporting maintenance tasks in modern building management systems, production plants, and public infrastructure. Its high measuring range supports general current checks, while its microamp sensitivity addresses regulatory requirements for sensitive safety installations, making it indispensable for preventative maintenance, installation certification, and regulatory inspections.
User-Centric Functions Enhance Field Efficiency
To meet the day-to-day challenges of electrical diagnostics, the Megger DCM300E integrates practical, user-focused functionalities. The data hold feature freezes readings on the display for later reference, ideal for environments with poor visibility or challenging access. The clamp’s automatic power-off function prevents battery depletion by shutting down after ten minutes of inactivity, ensuring optimal battery life and reducing operational interruptions. The instrument’s 40 mm jaw size accommodates a wide range of cable and busbar sizes, supporting versatile current measurement in diverse electrical environments. With a sampling rate of approximately two times per second for the digital display—and twelve times per second for the bar graph—the DCM300E ensures dynamic, real-time data capture, making it easier to spot transient events and evolving trends during testing.
TPT24: The Premier Source for Genuine DCM300E
When sourcing the original Megger DCM300E Earth Leakage Clamp Meter, discerning professionals rely on tpt24—the world’s leading online destination for authentic Megger products. tpt24 guarantees that every DCM300E is delivered with full assurance of genuineness and performance, no matter the customer’s location. Offering global shipping, verified quality assurances, competitive pricing, and responsive customer support, tpt24 is recognized as the preferred choice for electrical industry practitioners who demand reliability and manufacturer-backed warranties. Whether you need a single device for a small trade business or fleet units for international projects, tpt24 streamlines the procurement process, building confidence and continuity for customers worldwide.
Specifications
| Specification | Description |
|---|---|
| Measuring Function | Earth leakage and load current measurements |
| Measurement Ranges | 30 mA, 300 mA, 30 A, 300 A |
| Minimum Resolution | 0.01 mA (30 mA), 0.1 mA (300 mA), 0.01 A (30 A), 0.1 A (300 A) |
| Display | 3.5-digit LCD (max 3200), analogue style bar graph |
| Jaw Opening Size | 40 mm |
| Over Range Indication | “OL” mark on LCD display |
| Low Battery Indication | 2.5 – 2.7 V, “±” mark on LCD |
| Data Hold | Yes (“DH” mark) |
| Sampling Time | 2 times/sec (digital), 12 times/sec (bar graph) |
| Auto Power Off | After ~10 minutes of inactivity |
| Operating Temperature | 0 – 40°C (<80% RH, non-condensing) |
| Storage Temperature | -10 – 60°C (<70% RH, non-condensing) |
| Maximum Circuit Voltage | Less than AC 600 V |
| Withstand Voltage | AC 3700 V/1 min (core to case) |
| Power Supply | 2 x 1.5 V LR44 button cells |
| Battery Life | Approximately 50 hours (LR44) |
| Dimensions (W x H x D) | 64 x 176 x 23 mm |
| Weight | Approx. 125 g |
| Safety Standards | EN61010-1, EN61010-2-032, CAT III 300 V, CAT II 600 V |
| EMC Compliance | IEC61326 |
| Accessories | Carry case, 2 x LR44 batteries, instruction manual |












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