• 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.

The WRM-10P is a low resistance ohmmeter with all of the features of the WRM-10 above. In addition to the features of the WRM-10, the WRM-10P includes a built-in 2.5" wide thermal printer that allows test records to be printed in the field. Test records can also be downloaded to a PC.

WRM-10P

lightweight winding resistance meter

The WRM-10P is designed to accurately measure the winding resistance of

highly inductive power transformers. The unit’s dual resistance-reading input

channels can measure two winding resistances simultaneously, and four-wire

(Kelvin) connections provide high accuracy and require no lead compensation.

The WRM-10P provides stable resistance readings of very large transformers by

utilizing a 36Vdc power supply capable of outputting up to 10 Amperes. The resistance

reading of a 100MVA transformer can be achieved in 5 minutes or less.

The unit’s power supply is cooled by heavy-duty fans designed for continuous

operation. For greater fl exibility in the fi eld, the WRM-10P comes with a built-in

2.5-inch wide thermalprinter used for printing test reports.

Since the WRM-10P can accurately measure

resistances ranging from 1 micro-ohm to 2,000

ohms, it can also be used to measure EHV circuitbreaker

contact resistance, motor winding resistance,

or any low resistance. If the transformer

winding temperature is entered, the WRM-10P

can calculate the equivalent resistance value of

the winding material (aluminum or copper) at

any standard reference temperature. Also, a special

test mode can run a test for up to 45 minutes

while saving resistance readings at one-minute

intervals. In addition to measuring the resistance

value, the WRM-10P also checks the “make-before-

break” tap-switching sequences of voltage

regulators and load tap changers.

The WRM-10P can store test results in Flash EEPROM.

Test results can be printed on the built-in

2.5-inch wide thermal printer or can be transferred

to a PC via the RS-232C interface port.

The WRM-10P is furnished with three 50-foot

test cables. Each test cable lead is terminated

with a quick-disconnect test clip.

Built-in Safety Features

At the end of each test, the WRM-10P automatically

dissipates the stored energy in the transformer.

This discharge circuit will continue to

work even if the supply voltage is lost. For added

safety, the unit’s power supply is thermally protected

from over-load damage.

Internal Test Record

Storage

The WRM-10P can store 63 test records (up to

48 readings per test record) in Flash EEPROM.

Test records can be retrieved and printed on the

built-in thermal printer or can be transferred to

a PC via the RS-232C interface port. Windows®

-based software is provided with each WRM-

10P that can be used to retrieve test records

from the WRM-10P and can also be used to export

records in Microsoft® Excel format.

User Interface

The WRM-10P features a back-lit LCD screen

(20 characters by 4 lines) that is viewable in

both bright sunlight and low-light levels. A rugged,

alpha-numeric, membrane keypad is used

to control the unit.

Built-in Thermal Printer

The WRM-10P features a built-in 2.5" wide thermal

printer that can be used to print test reports

in the fi eld.

Part number WRM-10P WRM-10P and cables

Part number WRM-10P CASE WRM-10P shipping case

Part number WRM-10P 50-FT CABLES 50-foot test cables

Part number TP3 2.5-inch wide thermal printer paper