The DLRO200-115 is designed to check and measure contact resistance in high voltage circuit breakers, disconnecting switches (isolators), busbar joints, or for any low resistance measurement. The test set accurately measure resistances ranging from 0.1µΩ to 1Ω, at high currents.

This versatile instrument can provide test currents from 10 amps up to 200 amps, 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 amps through a total current loop resistance of 11 milliohms. 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.

300 sets of results may be stored in the test set’s on-board memory for later download to a PC or may be outputted directly to a printer via the RS232 port. You may also add notes to any stored result by using the on-board alphanumeric keypad, thereby making later identification of results easier to determine.

• Small and weighs less than 33 lbs (15kg)
• Test currents from 10 A to 200 A d.c.
• Filtered direct current output eliminates magnetic transients
• On board memory for up to 300 test results and notes
• RS232 port to download stored results or for real time output to a printer
• Supplied complete with 16 ft. (5m) test leads and download software

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

100 µΩ to 100 mΩ

Current Lead Resistance (Megger supplied leads)

More than 10 minutes at 200 A @ 68° F (20º C) ambient.

Power Supply
for full output (additional smoothed):

Storage Capacity:

300 result sets and memo, battery backed for 10 years. Memo field: 160 characters max.

Test Current
Range: Filtered direct current; 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: 14 to +122º F (-10 to +50º C)
Storage: -13 to 149º F (-25 to +65º C)
Calibration: 68° F (20º C)
Co-efficient: <0.05% per º C
Max. Humidity: 95% RH non-condensing
Maxi Altitude: 6562 ft. (2000 m)

Safety: IEC61010 – (1995)

Please contact us for more information on the Megger DLRO 200-115

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