promet se precision resistance tester from kocos
TRANSCRIPT
![Page 1: PROMET SE Precision Resistance Tester from KoCoS](https://reader033.vdocument.in/reader033/viewer/2022061605/55d1fbf7bb61eb775a8b45af/html5/thumbnails/1.jpg)
PROMET SEPrecision Ohm Meter
![Page 2: PROMET SE Precision Resistance Tester from KoCoS](https://reader033.vdocument.in/reader033/viewer/2022061605/55d1fbf7bb61eb775a8b45af/html5/thumbnails/2.jpg)
Condition & Analysis of • Electrical contacts• Breaker Main Contacts
PROMET SE
Content
Problem
Effects on a connection
Solution
PROMET SE
![Page 3: PROMET SE Precision Resistance Tester from KoCoS](https://reader033.vdocument.in/reader033/viewer/2022061605/55d1fbf7bb61eb775a8b45af/html5/thumbnails/3.jpg)
Electrical plant and equipment:Cross temperatures must not be exceeded
Resistance increase with operating time
Heating by power loss
Ageing connections
Which problem is to be solved?
![Page 4: PROMET SE Precision Resistance Tester from KoCoS](https://reader033.vdocument.in/reader033/viewer/2022061605/55d1fbf7bb61eb775a8b45af/html5/thumbnails/4.jpg)
Switching devices are essential equipment in a substation.
The current must be interrupted save if a failure occurs.
To guarantee the operation the circuit breaker need maintenance.
Reasons:• Wear of the moving parts• Leak on valves and seals• Failures in control circuits• Deterioration of contact parts
Switching devices
![Page 5: PROMET SE Precision Resistance Tester from KoCoS](https://reader033.vdocument.in/reader033/viewer/2022061605/55d1fbf7bb61eb775a8b45af/html5/thumbnails/5.jpg)
Reliable operation is endangered
Power supply companies want to avoid interruptions of energy transport
Inspection and maintenance of equipment
Lifetime and Functionality
![Page 6: PROMET SE Precision Resistance Tester from KoCoS](https://reader033.vdocument.in/reader033/viewer/2022061605/55d1fbf7bb61eb775a8b45af/html5/thumbnails/6.jpg)
Contact: 2 surfaces
Contact surface: rough
Micro contacts
Small effective area Greater resistance
P = R I2
Contact resistance
Which affects the temperature of a connection?
![Page 7: PROMET SE Precision Resistance Tester from KoCoS](https://reader033.vdocument.in/reader033/viewer/2022061605/55d1fbf7bb61eb775a8b45af/html5/thumbnails/7.jpg)
OxidationOxide layer reduce current bearing area
Contact wearMechanical effect movement, friction and arc effect
Contact forceForce can decrease: e.g. loose or misaligned contact
increase the contact temperature, leading to its destruction
Further effects for contact resistance
![Page 8: PROMET SE Precision Resistance Tester from KoCoS](https://reader033.vdocument.in/reader033/viewer/2022061605/55d1fbf7bb61eb775a8b45af/html5/thumbnails/8.jpg)
New solution for connections and switching devices
PROMET SEPrecision Ohm Meter
Stand-alone unit and external control via ACTAS systems
Static- and dynamic resistance measurement
![Page 9: PROMET SE Precision Resistance Tester from KoCoS](https://reader033.vdocument.in/reader033/viewer/2022061605/55d1fbf7bb61eb775a8b45af/html5/thumbnails/9.jpg)
Stand alone device
Up to 200 A
Small lightweight box
Independent from mains voltage
Static resistance measurement
Quality of contactse.g. busbar, earthing switches, …
Stand-alone
![Page 10: PROMET SE Precision Resistance Tester from KoCoS](https://reader033.vdocument.in/reader033/viewer/2022061605/55d1fbf7bb61eb775a8b45af/html5/thumbnails/10.jpg)
Via ACTAS• Digital communication
Up to 200 A
2 breaks per phaseTotal: 3 x 2 chambers
Connection direct at the chamber• Short current and voltage cables• Less weight
Static and dynamic measurement• Synchronization betweenpoles and chambers
External control
PROMET SE
PROMET SE
![Page 11: PROMET SE Precision Resistance Tester from KoCoS](https://reader033.vdocument.in/reader033/viewer/2022061605/55d1fbf7bb61eb775a8b45af/html5/thumbnails/11.jpg)
Specifications
PROMET SE
Housing Hand case(200 x 178 x 100) mm
With strap for attachment to the breakerTransport case
Weight 1,5 kg (without accessories)
Connection 4 mm safety plugs9 mm high current plugs
Current up to 200 A
Current/Voltage channels
2
Terminal voltage
~ 2,5 VDC
Resistance up to 200mΩ
Power supply - Battery back-up (all day measurement)- External power supply (AC-Adapter)
![Page 12: PROMET SE Precision Resistance Tester from KoCoS](https://reader033.vdocument.in/reader033/viewer/2022061605/55d1fbf7bb61eb775a8b45af/html5/thumbnails/12.jpg)