Overview

   Test currents from 10 A to 200 A DC

The Megger DLRO200-115 measures contact resistance in high voltage circuit breakers, disconnecting switches (isolators), busbar joints, or for any other low resistance measurement.

This test set accurately measures resistances ranging from 0.1 µΩ to 1 Ω, at high currents.

A versatile instrument, it can provide test currents from 10 A up to 200 A, subject to the load resistance and supply voltage. For those applications that demand a smooth DC current, the DLRO200-115 has extra filtering on the output to reduce mains frequency ripple and can drive 200 A through a total current loop resistance of 11 mΩ. The filtered output of the DLRO200-115 also eliminates magnetic transients that could inductively trip a breaker’s control (bus differential relay), if left in the test circuit.

The unique design allows the weight and size of the DLRO200-115 to be kept to a minimum; the instrument weighs less than 32 lbs (15 kg). This small size plus a water/dust ingress rating of IP54 makes the test set equally at home in the workshop, on the production floor or in the field. 

SPECIFICATIONS
Measurement:
                        Range: 0.1 μΩ to 999.9 mΩ
(Subject to supply voltage and leads used)
Accuracy:
                Voltage ±0.5% ± 0.1 mV
                Current ±0.5% ± 0.1 A
Resistance: Better than 1% from 300 μΩ to 100 mΩ
                   Better than ±2% from
                   100 μΩ to 300 μΩ
Current Lead Resistance (Megger supplied leads)
2 x 5 m 25 mm2 current leads 8 m
2 x 5 m 50 mm2 current leads 4 mΩ
2 x 10 m 70 mm2 current leads 5.4 mΩ
2 x 15 m 95 mm2 current leads 6 mΩ
Maximum Continuous Test Time
More than 10 minutes at 200 A @ 20 ºC ambient.
Power Supply for DLRO200for full output (unsmoothed d.c.)
100 to 265 V 50/60 Hz with a load less than 19 mΩ (supply >207 V rms), or 11 mΩ (115 V rms) including current leads
Power Supply for DLRO200-115 Vfor full output (additional smoothing)
100 to 130 V 50/60 Hz with a load less than 11 mΩ including current leads
Test Modes: Manual, Auto, Continuous.
Test Time: 10 seconds NORMAL /AUTO mode. Refreshed every 2 seconds in CONTINUOUS mode
Display: Large, high resolution backlit liquid crystal display
Warnings Current flowing: - LED. Other warnings are shown on the lcd display
Data Transfer Real time or batch download via RS232 using Download Manager.
Storage Capacity:
300 result sets and memo, battery backed for 10 years.
Memo field: 160 characters max.
Test Current
                  Range: 10 A to 200 A d.c. *
Accuracy : ±2% ±2 A
Voltmeter input
                       impedance: >200 kΩ
Hum rejection: 5 V rms 50 Hz/60 Hz
Temperature
Operation: -10 to +50 ºC (-14 to +122 ºF)
Storage: -25 to +65 ºC (-13 to 149 ºF)
Calibration: 20 ºC
Co-efficient: <0.05% per ºC​

Max. Humidity: 95% RH non-condensing
Weight: 14.5 kg (excluding test leads) (31.97 lbs)
Safety: IEC61010-1
EMC: IEC61326-1
Dimensions: 410 x 250 x 270 mm (16.4 x 9.84 x 10.63 ins)
Weight: 14.5 kg (excluding test leads) (31.97 lbs)​

 세부사항은 기술자료실 참조​​