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Punte testare rezistente infasurari transformatoare Vanguard TRM-40

Cod: Vanguard TRM-40


 
Brosura produs PDF, 0.42 Mb
   

Descriere

  • accurately measure resistance values from 1 micro-ohm to 500 Ohms
  • Auto-discharge circuit for operator safety
  • Demagnetizes transformer after test
  • Selectable test current from 1A to 40A
  • RS-232C, USB, and Bluetooth computer interfaces
  • Built-in thermal printer

 

The TRM-40 is Vanguard Instruments’ third generation transformer winding resistance meter. The TRM-40 is designed specifically to measure DC resistance values of transformer windings, rotating machine windings, or any dc resistance of an inductive device.

The TRM-40 features dual resistance-reading input channels that can measure two winding resistances simultaneously (primary and secondary windings of a transformer). It can provide a fast and stable reading of very large transformers by utilizing a 60Vdc power supply. The TRM-40 is capable of outputting a selectable test current from 1A to 40A.

Since the TRM-40 can accurately measure resistance values from 1 micro-ohm to 500 Ohms, it can be used as micro-ohm meters to measure EHV circuit breaker contact resistance, or for any low resistance measuring application. The TRM-40 can automatically demagnetize the inductive device under test, eliminating the manual task of demagnetizing the transformer core after a resistance test.

 

 

Since the TRM-20 and TRM-40 can accurately measure

resistance values from 1 micro-ohm to 500 Ohms (up

to 2,000 Ohms for the TRM-20), they can be used as

micro-ohm meters to measure EHV circuit breaker contact

resistance, or for any low resistance measuring application.

If the transformer winding resistance temperature is

available at the time of testing, the TRM can calculate

the equivalent resistance value at any temperature

value. This useful feature allows the user to compare the

fi eld readings against the factory test resistance values.

A special test mode allows the TRM to collect data automatically

for up to 90 minutes (at 60-second sampling

interval) or 45 minutes (at 30 second sampling interval).

Test data is recorded with a time stamp.

All test results can be printed on a 2.5" wide thermal

printer. Test record header information including the

company, substation name, transformer information can

also be entered using the 16-key key pad.

The TRM-20 and TRM-40 can automatically demagnetize

the inductive device under test, eliminating the

manual task of demagnetizing the transformer core after

a resistance test.

The TRM can also be computer-controlled via the unit's

RS-232C, USB, or Bluetooth interface.

 

The TRM also has a "make-before-break"

test mode that can be used to test the load

tap changer (LTC) or voltage regulator test

sequence. The TRM produces a "Dynamic-Resistance"

graph of the LTC or voltage regulator

contact under operation. An opened contact can

be detected visually from this resistance chart.

The TRM’s built-in LTC/Voltage regulator can be

used to change the LTC/Voltage regulator tap

position from the TRM front panel.
 

Accesorii standard

Part number TRM-20 TRM-20, cables, software

Part number TRM-40 TRM-40, cables, software

Part number TP3 2.5-inch wide thermal printer paper

 

Alte produse VANGUARD

PUNTE MASURA REZISTENTA INFASURARE TRANSFORMATOR VANGUARD TRM-20

• accurately measure resistance values from 1 micro-ohm to 2,000 Ohms
• Auto-discharge circuit for operator safety
• Demagnetizes transformer after test
• Selectable test current from 1A to 20A
• RS-232C, USB, and Bluetooth computer interfaces
• Built-in thermal printer

 
ANALIZOR CIRCUIT INTRERUPERE INALTA TENSIUNE VANGUARD DIGITMR

• dry-contact inputs 3 dry-contact channels
• timing windows 1 second, 10 seconds, or 20 seconds
• timing resolutions ±50 micro-seconds @ 1 sec. duration
• Stand-alone, microcomputer-driven EHV Circuit Breaker Analyzer
• Analyzes contact time, stroke, velocity, over-travel, and contact wipe
• USB PC interface & USB Flash drive interface
• Built-in thermal printer

 
ANALIZOR COMUTATOARE PLOTURI IN SARCINA SI REZISTENTA INFASURARI TRANSFORMATOARE VANGUARD LTCA-10

• Auto discharge circuit for operator safety
• 3 resistance reading channels including one dynamic channel
• Digital resistance reading from 1 micro-ohm to 500 ohms
• Calculate equivalent resistance value at reference temperature
• Stores 50 static records and 20 dynamic records
• Built-in 4.5-inch thermal printer
• Weighs less than 44 lbs.

 
TRUSA TESTARE TRANSFORMATOARE DE CURENT, RAPORT TRANSFORMARE, EXCITATIE, SATURATIE, POLARITATE VANGUARD EZCT-2000A

• Perform Saturation, Ratio and Polarity Tests
• Perform CT Winding Resistance Test
• Fully Automated
• Test record header information including company, substation name, circuit ID, manufacturer, CT serial number, operator name, and test record-comments
• Plot Multiple Saturation Curves
• Store 140 Records (of 10 Saturation Curves)
• Computer Interface
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• Dry-contact inputs: 3 channels
• Trigger input voltage open/close: 30 ¬ 300 V, DC or peak AC
• Breaker operations: Open, Close, Open-Close, Close-Open
• Timing resolution: ±0.1 millisecond
• Detect Main & Insertion Resistor Contacts on same input
• USB computer interface
• Built-in 2.5" wide Thermal Printer

 
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• 1 to 200A programmable test current
• Resitance range: 1µ?..10m? at 200A to 1µ?..5? at 1A
• Very lightweight: 19.8 lbs. (8.9 Kg)
• Measures circuit breaker contact resistance with safety ground on (with the Dual Ground option)
• Stores test records on-board or on external USB Flash drive
• Built-in 2.5" wide thermal printer

 
TRUSA DIGITALA TESTARE RELEE DE PROTECTIE VANGUARD RFD-200

• Timer: 0 to 9.999 sec, 1 ms resolution; 10.00 to 99.99 sec, 10 ms resolution, 100.00 to 999.999 sec, 100 ms resolution
• built-in Timer displays contact time in both cycles and milliseconds
• AC current source with 3 outputs (10A, 40A, 100A)
• AC voltage source for testing relays up to 250 Vac
• DC Voltage source (0 - 300 Vdc)
• Volt meter input (0 - 600 V input range)
• Three power supplies (24 Vdc, 48 Vdc, 124 Vdc)
• Built-in power resistors

 
OHMMETRU REZISTENTA INFASURARI SI BOBINAJ TRANSFORMATOARE INDUCTIVE DE MARE PUTERE VANGUARD WRM-10P

• Range from 1 micro-ohm to 2,000 ohm
• Up to 10 Amperes of test current
• Auto discharge circuit for operator safety
• Built-in 2.5" Thermal Printer, computer interface
• Stores 48 records of 63 readings
• Weighs less than 27 lbs.

 
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• Displays turns-ratio from 0.8-15,000
• Calculates turns-ratio percentage error
• Displays winding polarity and phase angle
• Displays excitation current
• Battery or AC-powered (ATRT-01B S3 only)
• Standalone or computer-controlled

 
ANALIZOR COMUTATOR PLOTURI IN SARCINA SI REZISTENTA INFASURARE TRANSFORMATOR TRIFAZAT VANGUARD LTCA-40

• Auto discharge circuit for operator safety
• 3 resistance reading channels including one dynamic channel
• Digital resistance reading from 1 micro-ohm to 500 ohms
• 60Vdc power supply , outputting 40 amperes
• Calculate equivalent resistance value at reference temperature
• Stores 50 static records and 20 dynamic records
• Built-in 4.5-inch thermal printer