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The Tap Changer Analyzers & Winding Ohmmeters RMO-T series are designed for tap changer analysis and for winding resistance measurement of inductive test objects. RMO-T instruments are based on state of the art technology,
using the most advanced switch mode technique available today. RMO-T
generates true DC ripple free current (up to 60 A @ 60 V) with automatically regulated
measurement and discharge circuit.
RMO-T instruments can perform a simple and quick, but reliable transformer OLTC condition assessment. Measuring ripple of the current, transition time during the tap change, and value of the winding resistance in tap positions, problems with contacts, and selector/diverter switch operation (tap change with interruption) can be detected. |
| Typical application areas of
RMO-T are high-voltage substations and industrial environments.
An important part of commissioning, maintaining and production is
measuring winding resistance of: |
- transformers
- generators
- electrical motors
- high-current busbar joints
- cable splices
- welding joints
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| Winding Ohmmeters RMO-TW series |
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| CURRENT RANGE |
5 mA - 10 A |
5 mA - 20 A |
5 mA - 30 A |
5 mA - 50 A |
| RESISTANCE RANGE |
0,1 µΩ-2 kΩ |
0,1 µΩ-2 kΩ |
0,1 µΩ-2 kΩ |
0,1 µΩ-2 kΩ |
| RESOLUTION |
0,1 µΩ |
0,1 µΩ |
0,1 µΩ |
0,1 µΩ |
| TYPICAL ACCURACY |
0,2 % |
0,2 % |
0,2 % |
0,2 % |
| PC SOFTWARE |
YES |
YES |
YES |
YES |
| TAP CHANGER VERIFICATION |
YES |
YES |
YES |
YES |
| BUILT-IN THERMAL PRINTER |
OPTIONAL |
OPTIONAL |
OPTIONAL |
OPTIONAL |
| BUILT-IN TC CONTROL |
NO |
NO |
NO |
NO |
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Tap Changer Analyzers & Winding Ohmmeters RMO-TC series |
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| CURRENT RANGE |
5 mA - 25 A |
5 mA - 40 A |
5 mA - 60 A |
| RESISTANCE RANGE |
0,1 µΩ-2 kΩ |
0,1 µΩ-2 kΩ |
0,1 µΩ-2 kΩ |
| RESOLUTION |
0,1 µΩ |
0,1 µΩ |
0,1 µΩ |
| TYPICAL ACCURACY |
0,2 % |
0,2 % |
0,2 % |
| PC SOFTWARE |
YES |
YES |
YES |
| TAP CHANGER ANALYSIS |
YES |
YES |
YES |
| BUILT-IN THERMAL PRINTER |
OPTIONAL |
OPTIONAL |
OPTIONAL |
| BUILT-IN TC CONTROL |
OPTIONAL |
OPTIONAL |
YES |
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| Tap Changer Analyzers & Winding Ohmmeters RMO-TD series |
| |
| CURRENT RANGE |
5 mA - 40 A |
5 mA - 60 A |
5 mA - 100 A |
| RESISTANCE RANGE |
0,1 µΩ-2 kΩ |
0,1 µΩ-2 kΩ |
0,1 µΩ-2 kΩ |
| RESOLUTION |
0,1 µΩ |
0,1 µΩ |
0,1 µΩ |
| TYPICAL ACCURACY |
0,2 % |
0,2 % |
0,2 % |
| PC SOFTWARE |
YES |
YES |
YES |
| TAP CHANGER ANALYSIS |
YES |
YES |
YES |
| DEMAGNETIZATION |
YES |
YES |
YES |
| OLTC MOTOR CURRENT MEASUREMENT |
YES |
YES |
YES |
| BUILT-IN THERMAL PRINTER |
OPTIONAL |
OPTIONAL |
OPTIONAL |
| BUILT-IN TC CONTROL |
OPTIONAL |
YES |
YES |
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| Accessories |
| Cables and clamps |
DV Power provides Current Cables with cross sections of 2,5 mm2 and 10 mm2, with lengths of 10 m and 15 m.
All our cables are delivered with specially designed clamps, adjusted for the most transformer terminals.
Sense Cables are with lengths of 10 m and 15 m.
Current connection cables are 5 m long, with cross sections of 6 mm2 or 10 mm2 and with appropriate clamps. |
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| Current cables with battery clamps |
Voltage sense cables with alligator clamps |
Current connection cable with battery clamps |
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| Current cables with TTA clamps |
Voltage sense cables with TTA clamps |
Current connection cable with TTA clamps |
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| Current cables with C clamps |
Voltage sense cables with C clamps |
Current connection cable with alligator clamps |
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| Current cables with alligator clamps |
Voltage sense cables with alligator clamps |
Current connection cable with alligator clamps |
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| Transport bags, Cable bag, Cable plastic case |
| DV Power provides cable bag or transport case for RMO10TW, RMO20TW, RMO30TW, RMO50TW, although for RMO25TC, RMO40TC, RMO60TC, RMO40TD and RMO60TD we offer Cable bag or Cable plastic case as an optional accessory. |
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| Transport case |
| Hard transport case is an optional accessory which improves mechanical protection of devices in transport. |
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| Test shunt |
| We offer two types of test shunts: 150 A / 150 mV and 600 A / 60 mV. They could be used for accuracy checking of our Winding Ohmmeters. |
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| Built-in thermal printer |
| DV Power provides devices with 80 mm paper wide built-in thermal printer, as an optional accessory. |
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