Atec Megger-DLRO-H200 - Manual

DLRO-H200
Micro-ohmmeter
■ ■
Bluetooth headset for audible pass/fail
testing against adjustable limits
■ ■ Up to 240 amps
■ ■ Battery supplied
■ ■ Lightweight – 1 kg
■ ■ Safe test – DualGround™
■ ■ Auto range: 1 µΩ to 1000 mΩ
■ ■
Bluetooth ® PC communication
■ ■ Complies with IEEE and IEC standards
■ ■ PowerDB Lite included for data management
and collection
DESCRIPtIOn
The DLRO-H200 is designed to measure the resistance of
circuit breaker contacts, bus-bar joints and other high-current
links. This product is designed with safety, ease of use and
versatility in mind.
This Micro-ohmmeter can be used anywhere to measure a
low resistance value with high accuracy.
With DLRO-H200, it is possible to make measurements
according to the DualGround
TM method. This means that the
test object will be grounded on both sides throughout the test
giving a safer, faster and easier workflow.
Rugged and lightweight, the handheld DLRO-H200 is very
suitable for field work, in substations and similar locations.
The unit comes with a strong rubber holster that makes it
extra durable. The DLRO-H200 is designed to carry out a full
day of testing without recharge. It can store 190 test values
and transfer test data to a PC via Bluetooth.
The Bluetooth feature can also be used in conjunction with
the wireless headset (supplied) to provide an audible pass/
fail signal against user adjustable limits as tests are performed.
DLRO-H200 micro-ohmmeters are supplied with a copy of
the PowerDB Lite software package. This intuitive software
offers powerful features for storing, analyzing and archiving
test results, and it supports reporting a wide range of industry
standard formats. It also makes it easy to integrate results
from the DLRO-H200 with results from other instruments to
produce uniform reports.
APPLICAtIOnS
The DLRO-H200 test system is designed to serve a number
of applications. The most common are contact resistance
measurements of low-, medium- and high-voltage breakers
and also at bus-bar joints and other high current links.
If the contact resistance is too high this will lead to power
loss and temperature rise, which often leads to serious
trouble. To avoid such problems, it is necessary to check the
resistance at regular intervals.
The following table demonstrates how important low
resistance is at high currents:
Current Contact resistance Power loss
10 kA 1 mΩ 100 kW
10 kA 0.1 mΩ 10 kW
1 kA 1 mΩ 1 kW
1 kA 0.1 mΩ 100 W
At 10 kA, a contact with the resistance 0.1 mΩ gives a
power loss of 10 kW. This power loss in one single point
will definitely confer a temperature rise, which may result in
overheating and possibly premature failure.
DLRO-H200
Micro-ohmmeter