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 µ¥Ø to 1 ¥Ø, 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 m¥Ø. 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 ¥ì¥Ø to 999.9 m¥Ø
(Subject to supply voltage and leads used)
Accuracy:
Voltage ¡¾0.5% ¡¾ 0.1 mV
Current ¡¾0.5% ¡¾ 0.1 A
Resistance: Better than 1% from 300 ¥ì¥Ø to 100 m¥Ø
Better than ¡¾2% from
100 ¥ì¥Ø to 300 ¥ì¥Ø
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 m¥Ø
2 x 10 m 70 mm2 current leads 5.4 m¥Ø
2 x 15 m 95 mm2 current leads 6 m¥Ø
Maximum Continuous Test Time
More than 10 minutes at 200 A @ 20 ¨¬C ambient.
Power Supply for DLRO200for full output (unsmoothed d.c.)
100 to 265 V 50/60 Hz with a load less than 19 m¥Ø (supply >207 V rms), or 11 m¥Ø (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 m¥Ø 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 : ¡¾2% ¡¾2 A
Voltmeter input
impedance: >200 k¥Ø
Hum rejection: 5 V rms 50 Hz/60 Hz
Temperature
Operation: -10 to +50 ¨¬C (-14 to +122 ¨¬F)
Storage: -25 to +65 ¨¬C (-13 to 149 ¨¬F)
Calibration: 20 ¨¬C
Co-efficient: <0.05% per ¨¬C
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)
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