Transformer Resistance Meter
Transformer Resistance Meter

Transformer Resistance Meter

Transformer Winding Resistance Meter
Transformer Resistance Meter Transformer Resistance Meter

$15,425.15

Manufacturer: Vanguard Instrument

Model: TRM 203

P/N: 9060-UC

Supplied with: Base unit with PC software, cables, cable bag, shipping case, and built-in thermal printer. Printer uses

SKU: AMA-5127-24
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Description

Transformer Resistance Meter

Transformer Resistance Meter

Description of Transformer Resistance Meter

Three Phase 25 Amp Winding Resistance Meter with Auto Demagnetization

The TRM-203 is a  three phase transformer winding resistance meter that allows the user to connect all test cables to the transformer bushings. The unit will then measure the transformer resistance value for each of the phases without the need to disconnect and reconnect cables for each phase. The TRM-203 can provide a fast and stable reading of very large transformers by utilizing a 60Vdc power supply. It is capable of outputting a selectable test current from 1A to 25A. Since the TRM-203 can accurately measure resistance from 1 micro-ohm to 2000 Ohms, it can be used as a micro-ohm meter to measure EHV circuit breaker contact resistance, or for any low resistance measuring application.

  • Perform three phase test on a transformer without the need to switch cables
  • Can provide individual Delta winding resistance values
  • Can provide individual Wye (with no neutral) winding resistance values
  • Demagnetize transformer after test
  • Selectable test current from 1A to 25A
  • Computer control via RS-232C, USB, or Bluetooth interface
  • Built-in 2.5″ wide thermal printer

User Interface

The TRM-203/403 features a back-lit graphic LCD screen (240 x 128 pixels) that is clearly visible in both bright sunlight and low light levels. A 44- key “QWERTY”-style membrane keypad is used to enter test information and operate the unit.

Computer Interface

The TRM-203/403 can be connected to a PC via the unit’s RS-232C, USB, or Bluetooth interface. A PC can be used to control the TRM-203/403 to perform transformer resistance tests. Test records (stored in the TRM-203/403 or a USB Flash drive) can also be retrieved, reviewed, and printed. Test records are automatically exported to PDF, Excel, and XML formats.

Safety Features

The TRM-203/403 automatically dissipates the energy stored in the transformer at the end of each test. The discharge circuit will continue to work even if the TRM-203/403 power supply is lost.

Test Record Storage

The TRM-203/403 can store up to 256 static test records (111 tests per record) and 120 dynamic test records internally. For external test record storage, the TRM-203/403 features a USB Flash drive interface port. Up to 999 test records can be stored on a connected USB Flash Drive.

TYPE Portable transformer winding resistance meter
PHYSICAL SPECIFICATIONS 21” W x 17” H x 9” D (53 cm x 43 cm x 24 cm); Weight: 35 lbs (15.8Kg)
OPERATING VOLTAGE 100 – 240 Vac, 50/60 Hz
RESISTANCE READING RANGE 1 micro-ohm to 2000 Ohms
ACCURACY 1 – 19,999 micro-ohms: ±0.5% reading, ±1 count
20 – 999 milliohms: ±1% reading, ±1 count
1 -2000 Ohms: ±1.5% reading, ±1 count
TEST CURRENT 1-25A in 1A increments
TEST VOLTAGE 60 Vdc charging, 18V DC max during measurement
INPUT CHANNELS 4 input channels for measuring resistance
DISPLAY Back-lit LCD (128 x 64 pixels), viewable in direct sunlight and low light levels
PRINTER Built-in 2.5″ wide thermal printer
INTERNAL DATA STORAGE 256 static test records (each can contain up to 111 readings) and 120 dynamic test records
EXTERNAL DATA STORAGE Up to 999 test records on external USB Flash drive.
COMPUTER INTERFACES RS-232C, USB, Bluetooth
SAFETY Designed to meet UL 61010A-1 and Can/CSA C22.2 No 1010.1092 standards
ENVIRONMENT Operating: -10ºC to 50ºC (15ºF to +122ºF)
Storage: (-30ºC to 70ºC (-22ºF to +158ºF)
HUMIDITY (MAX) 90% RH @ 40˚ C (104˚ F) non-condensing
ALTITUDE (MAX) 2000m (6562 ft) to full safety specifications
CABLES Four 50-foot test cables, one LTC control cable, one ground cable, one power cord, one USB cable
OPTIONS Shipping Case
WARRANTY One year on parts and labor
Specifications are valid at nominal voltage and ambient temperature of +25˚C (+77˚F).

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