ARES-200D is a micro-ohmmeter produced using advanced engineering technologies which can apply up to 200 A current. With its easy-to-use software, ARES-200D can easily measure contact resistances of circuit breakers, shunt and disconnector by applying adjustable current from 1A to 200A.
It can calculate the real values of the resistors by providing penetration with the feature of the continuous current application. ARES-200D can measure from 0.1 µ Ω to 5 Ω. ARES-200D is capable of measuring static and dynamic resistance of the contact points of the circuit breaker.
ARES-200D can measure idle circuit breakers as well as dual grounded circuit breakers. The optional current clamp will be able to measure the part of the current going through the ground line during the test and make the calculations considering this component.
The frequently used test models can be saved as templates and the tests can be performed more rapidly and quickly. Thanks to the quick test feature of the ARES-200D user interface, the test can be performed in barely 15 seconds.
The 4.3-inch touch colour display shows all measurement results manifest on a single screen. With an easy-to-use user-friendly interface, the ARES-200D guides operators to perform tests quickly.
ARES-200D’s flash memory feature allows controlling, recording and storing measurement results (up to 200 Test Records). And also the user can copy test records using a USB drive. Operators can easily print the measurement results with the 2.25-inch built-in printer of ARES-200D and can prepare on-field reports easily.
The HighTest data management platform (DMP Software) can also be used to control ARES-200D remotely by a PC and the measurement results can be easily analysed and stored in the PC.
With the ARES-200D’s Bluetooth option, tests can be started remotely via DMP software and the results can be transferred to the PC. Thus, on-field tests can be performed even by a single person.
With ARES-200D’s temperature measurement channel, the temperature values of the measured sample can be taken and calculated according to the desired temperature value. ARES-200D is a compact, rugged device with IP67 protection class (case closed) which weighs 9 kg.
Why do we measure contact transition resistance at breakers?
When high current passes over the switchyard, circuit breakers open the circuits or at the points where high current passes it acts as closing switches. Resistance value measured in periodic control of the circuit breaker should be the same as the resistance value in the closed position which is very important for system safety.
High resistance values may cause local hotspots, voltage drops, fire risk, unplanned power failure, and extra energy loss in the system. Maximum accuracy measurement with the 4-wire method (kelvin method) will indicate whether the breaker contacts are properly contacted, if there is any corrosion on the contacts, or it shows if there is an effect that increases the resistance.
ARES-200D can apply up to 200 A current through its current cable and measure the voltage drop on both sides of the resistance with the sense terminal. Thus the calculated resistance value displayed on ARES-200D is not affected by the resistance of the measuring cable.
Why Dynamic Resistance Meter?
In the circuit breakers, the time-dependent graph of the measured resistance when the breaker is switched from closed to open can be obtained to determine whether the contacts are deformed. This cannot be detected by measuring the circuit breaker only in the closed position. For this reason, dynamic resistance measurement is done on circuit breakers.