Winding Resistance Meters Single Phase with DRM

Winding Resistance Meters Single Phase with DRM – Overview

The RMO-TD series is designed for winding resistance measurement of inductive objects. It is based on the most advanced switch-mode technology available today. It is accurate (0,1% rdg + 0,1% F.S.), and powerful (up to 60 A). It generates a true DC ripple-free current with automatically regulated measurement and discharging circuit. It can perform simple, quick and reliable transformer on-load tap changer condition assessments. This series enables measurements of a winding resistance in every tap position, current ripple values and transition times during the tap changes. Problems with the connection, contacts, and selector/diverter switch operation can be detected with these measurements. It is equipped with thermal and overcurrent protection. It has a high ability to cancel electrostatic and electromagnetic interference that exists in HV electric fields. This is achieved by a proprietary filtration solution applied to both the hardware construction and the application software implementation.

Winding Resistance Meters Single Phase with DRM – Features

On-load tap changer (OLTC) dynamic resistance measurement DVtest
Three measurement channels
One temperature measurement channel
Tap changer motor current monitoring channel
Built-in tap changer control unit
Automatic resistance measurement for the Heat Run test
Rapid automatic demagnetisation
Automatic discharge circuit

Description

Winding Resistance Meters Single Phase with DRM | RMO-TD Series

Technical Data

Mains Power Supply

Connection according to IEC/EN60320-1; UL498, CSA 22.2

Mains supply: 90 – 264 V AC, 50/60 Hz

Input power:

1 800 VA (RMO25TD)

2 250 VA (RMO25TD and RMO60TD)

Winding Resistance Measurement

Test currents:

RMO25TD: 5 mA – 25 A DC

RMO40TD: 5 mA – 40 A DC

RMO60TD: 5 mA – 60 A DC

Output voltage: up to 55 V DC

Measurement range: 0,1 μΩ – 100 kΩ

Measurement range / Typical accuracy:

0.1 μΩ – 1.999 kΩ:± (0.1% rdg + 0.1% F.S.)

2 kΩ – 9.999 kΩ: ± (0.2% rdg + 0.1% F.S.)

10 kΩ – 100 kΩ: ± (1.0% rdg + 1.0% F.S.)

Measurement range / Resolution:

0.1 μΩ – 999.9 μΩ: 0.1 μΩ

1.000 mΩ – 9.999 mΩ: 1 μΩ

10.00 mΩ – 99.99 mΩ: 10 μΩ

100.0 mΩ – 999.9 mΩ: 0.1 mΩ

1.000 Ω – 9.999 Ω: 1 mΩ

10.00 Ω – 99.99 Ω: 10 mΩ

100.0 Ω – 999.9 Ω: 0.1 Ω

1.000 kΩ – 9.999 kΩ: 1 Ω

10.00 kΩ – 99.99 kΩ: 10 Ω

OLTC DVtest (DRM)

Sampling rate: 0,1 ms

Temperature Measurement

Measurement range -50 ºC – +180 ºC

Thermometer Pt100 class B

Resolution 0,1 ºC

Data Storage

1000 memory positions (standard)

5000 memory positions (optional)

Display

LCD screen 20 characters by 4 lines, with backlight, visible in bright sunlight

Computer Interface

USB (standard)

RS232 (optional)

Bluetooth (optional)

Printer (optional)

Built-in thermal printer

Paper width 58 mm / 2.3 in

Printer operating temperature: -20 °C – +70 °C

Environmental Protection

Ingress protection rating: IP67 (with closed lid)

Environmental Conditions

Operating temperature: -20 °C – +60 °C

Storage & transportation temperature: -40 °C – +70 °C

Humidity: 0 – 95% relative humidity, noncondensing

Dimensions and Weight

RMO25TD

13 kg, 478 x 194 x 389 mm

RMO40TD

13 kg, 478 x 194 x 389 mm

RMO60TD

13.2 kg, 478 x 194 x 389 mm

Warranty

3 years + 1 additional year upon registration on DV Power official website

Applicable Standards

Installation/Overvoltage category: II

Pollution degree: 2

Safety: LVD 2014/35/EU (CE Conform) Standard EN 61010-1:2010 CAN/CSA-C22.2 No. 61010-1, 2nd edition, including Amendment 1

EMC: Directive 2014/30/EU (CE Conform) Standard EN 61326-1:2010

All specifications herein are valid at ambient temperature of +25 °C / +77 °F and standard accessories. Specifications are subject to change without notice. Specifications are valid if the instrument is used with the standard set of accessories.

Winding Resistance Meters Single Phase with DRM | RMO-TD Series

Brand

DV Power

IBEKO Power AB, with headquarters in Stockholm (Sweden) and best known through the brand ”DV Power”, has developed radically light and ingenious test solutions for transformers, circuit breakers, and batteries. Founded by a group of engineers with deep knowledge and experience in the power electronics technology area. Sold worldwide – in over 100 countries. Their success is solely based on extensive research, development, and fast commercial application.

Winding Resistance Meters Single Phase with DRM | RMO-TD Series

Winding Resistance Meters Single Phase with DRM | RMO-TD Series