The Megger Insulation Resistance Tester BM-5200CN is a battery-powered insulation testing instrument designed for high-voltage insulation resistance testing during the maintenance and servicing of cables, rotating machinery, transformers, switchgear, and industrial applications.
The Megger Insulation Resistance Tester BM-5200CN is a battery-powered insulation testing instrument designed for high-voltage insulation resistance testing during the maintenance and servicing of cables, rotating machinery, transformers, switchgear, and industrial applications.
Features
Multiple Test Modes
Provides four insulation resistance (IR) test modes: InS, PI, DAR, and t. PI mode calculates the ratio of insulation resistance at ten minutes to that at one minute, while DAR calculates the ratio at 60 seconds to that at 30 seconds.
Automatic Discharge Function
Automatically discharges capacitive test objects through an internal resistor, indicating whether the voltage is in the range of 25 V to 600 V, or higher (> 600 V) for safe lead disconnection.
Accurate Measurement
Equipped with a guard terminal to minimize the impact of surface leakage during insulation resistance testing, reducing measurement errors.
Dual Display
Backlit LCD display featuring an analog arc and a dual-screen 3-digit display to clearly present test results.
Safety Assurance
Features include external voltage indication, automatic discharge with decaying voltage display, and lockable test leads. Rated at CAT III 600 V.
Operation and Use
Simple Operation
Features a rotating control switch for test voltage ranges and functions, alongside four arrow buttons for configuration, and a dedicated TEST button.
Battery Indicator
Located in the upper right corner of the display, offering four pairs of indicator segments to display the real-time battery level.
Specification
Details
Insulation Resistance Range
100 kΩ - 1 TΩ
Nominal Test Voltage
250 V, 500 V, 1000 V, 2500 V, 5000 V
Terminal Voltage Accuracy
<1000 V: 0 - +10% of nominal test voltage; ≥1000 V: 0 - +5% of nominal test voltage
Insulation Accuracy
Up to 1 GΩ: ±5% ±2 digits; Over 1 GΩ: 5000 V: ±5% ±0.04% per GΩ; 2500 V: ±5% ±0.08% per GΩ; 1000 V: ±5% ±0.2% per GΩ; 500 V: ±5% ±0.4% per GΩ; 250 V: ±5% ±0.8% per GΩ
Delivery information typically includes delivery times, shipping methods, packaging, etc., which may vary depending on the seller and the location of purchase.
What test modes are supported by the Megger BM-5200CN?
The instrument provides four insulation resistance (IR) test modes: InS (normal continuous measurement), PI (Polarization Index calculation over 10 minutes vs 1 minute), DAR (Dielectric Absorption Ratio calculation over 60 seconds vs 30 seconds), and t (single fixed-time test based on a set interval).
What is the safety rating and protection mechanism of the device?
The BM-5200CN has a safety rating of CAT III 600 V. It features external voltage indicators, an automatic discharge function that safely discharges reactive loads through an internal resistor, and lockable test leads to prevent accidental disconnection.
How does the guard terminal help during insulation resistance testing?
The guard terminal helps to minimize the effects of surface leakage on the test object, reducing measurement errors and significantly improving the overall accuracy of the test results.
What is the range of insulation resistance and test voltages?
The insulation resistance range covers 100 kΩ up to 1 TΩ. The available nominal test voltages are 250 V, 500 V, 1000 V, 2500 V, and 5000 V.
What type of batteries does the BM-5200CN use and how long do they last?
The device is powered by 8 x LR6/AA batteries. When using alkaline AA LR6 batteries, the typical battery life is approximately 5 hours at a test voltage of 5 kV into a 100 MΩ load.