R501 ADVANCED TRANSFORMER MONITOR | Rugged Monitoring
                     M O N I T O R I N G  S I M P L I F I E D
R501
ADVANCED TRANSFORMER MONITOR
Robust | Reliable | Responsive
R501 Rack Mount Comprehensive and Customizable Transformer Monitoring Solution
Rugged, Most Versatile and Multi Channel 
monitoring solution capable of monitoring one 
or multiple transformers for :
Basic Transformer Monitoring, Fibre Optic 
temperature monitoring, Partial Discharge, 
Bushing, OLTC, Cooling System, Load, Power, 
and more...
Key Features
Fully flexible rack mount and distributed Equipped with most accurate & advance 
architecture support transformer health assessment analytics
Expandable & Field upgradable to add Range of communication options and 
dierent transformer monitoring modules protocol support; Ethernet redundancy (PRP)
Highly secure, web server based Complies with the latest IEC/IEEE standards 
visualisation and configuration software. for Emission, Immunity, Safety and 
Environment.
Benefit
Increased transformer availability
Improved grid reliability
Transformer lifetime extension
Remote monitoring solution for various 
transformer parameters
Lower cost of installation and 
maintenance - Higher RoI
Faster integration with central condition 
monitoring system (On-Prem or Cloud)
01
R501
R501 SYSTEM ARCHITECTURE
1. Sensors on Transformer
2. Bushing Sensor
3. Fiber Optic Temperature
4. Sensors for Cooling
Monitoring & Control
5. Dissolved Gas Analyzers
6. Sensor on OLTC/RTCC
7. Partial Discharge Sensors
8. Transformer Control Cubicle
Remote / Integrated Display
1. Sensors on Transformer 2. Bushing Sensor 3. Fiber Optic Temperature 4. Sensors for Cooling
Monitoring & Control
5. Dissolved Gas Analyzers 6. Sensor on OLTC/RTCC 7. Partial Discharge Sensors 8. Transformer Control Cubicle
Sensors that can be connected to R501
1. OTI,WTI, RTD, PRD, Breather, Buchholz Relay, 4. Dissolved Gas Analyzer
LLG/OLI, Pressure Sensor etc. 5. Bushing adaptors and sensors
2. Range of Fibre Optic temperature 6. Range of Partial Discharge sensors
monitoring sensors
3. Cooling System and Control Cabinet
CCeertritfiificcaatitoionnss Variants
ATAETXEX LLloloyyddss CE / RoHs Oshore / Ethernet Enterprise
Marine Redundancy: PRP Monitoring
Software 02
R501 MONITORING FUNCTIONS
Real Time Monitoring and Advance Control
Direct Winding Hot Spot
HV Winding
LV Winding
MV Winding
Core Hot Spot
Bushing Monitoring
Leakage Current
TanDelta 
Power Factor
Capacitance
Load, Power, Losses
Load/Over Current
Active / Reactive Power
Overload Capacity
PF / Losses
Partial Discharge Monitoring
PD Amplitude
PD Discharge Rate
PD Trend
Dissolved Gas Analyzer Integration
Single gas DGA
Multi-gas DGA
Moisture
03
R501
RM EYE - Transformer Monitoring Software Transformer Health Assessment
Remote Monitoring and Control
Insulation Life Estimation
Overload Capacity
Bubbling Temperature
Moisture in Insulation
Real time Alarm and Notifications
Easy Integration
Essential Monitoring
Oil Temperature
Winding Temperature
Oil Level, Tank Pressure
Moisture in Insulation
Bubbling Temperature
Ageing Rate
Status/Relay Signals
Cooling Monitoring/Control
Fan/Pump Condition
Motor Condition
Cooling Eciency
Oil/Water Flow
OLTC Monitoring
Tap Position
Motor Current / Voltage
Motor Torque
Power Consumption
Oil Temperature
Partial Discharge Level
Dissolved Gases
04
R501
R501 Monitoring Modules
Comprehensive Features to Meet Market Demand
1 2 3 4 5 6 7 8 9
Remote / Integrated Display
1. CPU/GTW Module 3. Power Monitoring Module
Option A. CPU Module 03 Current & 03 Voltage Inputs
Data Processing & Storage Active, Reactive & Apparent Power
System Fault Relay Transformer Power Factor
01 x Serial (RS485) ports Through-Fault Monitoring (I2T)
02 x Ethernet (PRP support) Current Signature Analysis
Health Assessment Analytics OLTC Motor Torque
Option B. CPU with GTW
4. Digital Input Module
Main rack with CPU, 
Slave rack with GTW 08 or 16 channels
Provides power to all modules Input Voltage 75 - 250Vdc 
Up to 4 Racks can be Threshold Voltage > 60V
daisy chained
Built-in LED indicators
01 x Serial (RS485) ports
Option C. GTW without CPU 5. Relay Output Module
Main rack and slave racks with GTW 04 or 08 Form C Relays
Provides power to all modules Dry contact (NO-C-NC)
Supports FOM and FLM modules User Programmable
Up to 4 Racks can be daisy chained Built-in LED indicators
01 x Serial (RS485) ports
6. Analog Output 
2. Analog Input Module
08 or 16 Analog output
05 or 10 channels DC Current Loop (4-20mA / 0-1mA)
AC/DC current input Dc Voltage (0-5V / 0-10V)
RTD / Potentiometer User Programmable
Built-in LED indicators Built-in LED indicators
05
R501
7. Fiber Optic Module 8. Bushing Monitoring Module
02, 04, 06 and 08 Channels 03 or 06 Channels
GaAs (200u and 62.5u) Module Leakage Current 
Fluro Module Tan Delta / Power Factor
Built-in LED indicators Capacitance
Phase Voltage
9. Partial Discharge Module Custom Tap Adaptor for 
Dierent Bushing
04 or 08 Channels Continuous Monitoring
Wide Range (HF and UHF)
Sampling 125 Ms/s
Vertical Resolution 12bit
Advanced PD Analysis
HF UHF
UHF, Acoustic, Bushing PD Sensors available
One Solution for Multi-Site Power Cable
GIS
Multi Asset Monitoring
Transformer
AIS
RM EYE Motor
Improve the ROI 
& Asset life.
Generator
UPS
Relays
06
R501
Technical Specifications
POWER SUPPLY Input Power Requirement 24 - 48 Vdc (Default), 125 Vac/Vdc, and any other (upon request)
Data Storage Capacity MicroSD external memory slot (up to 2 TB)
CPU Logging Rate 1 sec interval on USB
MODULE
Config port USB (to use with Rugged connect windows software)
SYSTEM Maximum number of Channels Expandable to 256 Channels, Daisy chain up to 32 units 
CAPACITY (with Modbus, Canbus)
# of Channels 2, 4, 6 and 8 channels
Measurement Range -80 °C to +300 °C (cryogenic 4 °K range optional)
FIBER OPTIC
MODULES Resolution 0.1 °C
Accuracy ±1.0 °C (±0.2 °C in relative temperature)
Scan Rate 200 ms / channel ( Optional: Faster scanning rates available)
# of Input Channels 05 or 10 Channels
AC Current Input Clamp-on CT with dierent ranges: 5Amp, 10Amp, 20Amp, 
100Amp and others available
ANALOG INPUT
MODULE DC Current Input 4 - 20 mA
Temperature Input 100 ohm platinum (Pt100)
Potentiometer up to 20,000 ohms
# of Input Channels 03 Current and 03 Voltage
Current Input Range 0 - 5A
POWER 
MONITORING Voltage Input Range 0 - 250V
MODULE
Sampling Rate 32 KS/s
Measurement Parameters Power, Through-Fault, Motor Torque etc. 
# of Input Channels 08 or 16 Channels
DIGITAL INPUT
MODULE Dry Contact Resistance between the contact < 100 Ω
Powered Contact 75 - 250Vdc
# of Input Channels 08 or 16 Channels
ANALOG OUTPUT 
MODULE Output format 4-20 mA or 0-5V or 0-10V
Configurable for any measured / calculated value
# of Input Channels 03 or 06 Channels
BUSHING
MONITORING Leakage Current Range 1mA to 200mA
MODULE
Monitoring Parameters Tan Delta (PF), Capacitance, Phase Voltage
# of Input Channels 04 or 08 Channels
PARTIAL DISCHARGE Acquisition Bandwidth HPM: 0.01 - 100Mhz
MODULE UPM: 100 MHz - 2 GHz
Monitoring Parameters PD Amplitude, Discharge Rate and PRPD
OUTPUT RELAY 
MODULE # of Output Channels 04 or 08 Form C relays
Ethernet Ports (RJ-45 & FO Ethernet) Modbus, DNP3.0, IEC 60870-5-104, MQTT,  IEC61850, PRP
COMMUNICATION
OPTIONS Serial Port RS485 with Modbus support
CANBUS Port CANBUS Master/Slave support for Can Dataloggers
07
R501
Conducted & Radiated Emissions ICES-003 (2016), CISPR32 (2015), CISPR11 (2015)
ESD and EM Field Immunity IEC61000-4-2, C37.90-3, IEC61000-4-3, C37.90.2
Fast Transient & Surge Immunity IEC61000-4-4, IEC61000-4-5, C37.90.2
EMC COMPLIANCE
Magnetic Field Immunity IEC61000-4-8, IEC61000-4-10
Immunity from Conducted Disturbances IEC61000-4-6, IEC61000-4-16
Ripple, Dips & Damped Oscillatory IEC61000-4-17, IEC61000-4-18, IEC61000-4-29
Safety IEC60255-26 and CE Certified
Operating Temperature -40 to 72 °C
Operating Humidity 95% Non Condensing
ENVIRONMENTAL
AND MECHANICAL Storage Temperature -40 to 85 °C
Dimensions 8 Chaise W48.25 x H15.71 x D17.73 cm (19.00" x 2.25" x 6.98")
Weight App. 5Kg. (for complete filled Chassis)
Product Drawing
482.56mm [19.00in]
177.32mm [6.98in]
465.00mm [18.31in] 159.48 [6.28in]
57.15mm [2.25in]
37.70mm [1.48in]
143.58mm
[5.65in]
Weight : 5 Kilograms
Optional Smaller 3U Chassis
289.56
246.06 177.32
272.00
SCALE 1: 3
Odering Code
Contact our sales team for Ordering Code
08
143.58
132.55
6.35
37.70 57.15
DS0037R07_R501 TnD_EN_A4
Asset Monitoring : 
Enterprise Architecture
Compatible with Rugged Monitoring Enterprise Solution
UI UX
- Data Layer
- Analytics
- User Interface
- Custom Dashboards
- Reporting
- Email/SMS Notifications
RM EYE
Private Cloud (Customer Cloud), 
Rugged Monitoring Cloud
IEC 60870-104 ODBC
IEC 61850 MODBUS
FTP/SFTP DNP 3.0
- XML, JSON
- CSV, COMTRADE Data Collection HTTPS
MQTT
Asset Data
Transformer
Switchgear Power Cable - Oine Test Results - Historian Power Electronics
Monitoring 
Monitoring Monitoring - Inspection Records - CMMS (Battery, UPS, 
System 
System System - Name Plate - SCADA/ DCS VFD, Relay)
09
One Solution for Multi-Site
Multi Asset Monitoring
RM Eye - Unified platform to monitor entire network 
of electrical assets
Features
Advanced asset health monitoring with Built on well-established remote and 
analysis and recommendations to cloud-based monitoring technology
increase asset eectiveness in addition to 
maximizing equipment uptime Quick configuration so that you are not 
required to configure separately.
Modern remote monitoring solutions 
provide valuable insights to Multiple Protocols: MODBUS, MQTT, IEC61850
Assets at Multiple Sites from time to time Robust integration with 3rd party systems 
Establish a real time and consistent and devices with industry standard protocols
monitoring by getting the right Bulk configuration imports for fast 
information into right hands deployment
Simple and user-friendly interface Encompasses a secure access to data and 
providing easy and fast access to all the configuration
features
QR code scanner on mobile devices
Everything about the asset at one place 
The raw data, analysis and Accessible on web browser and mobile app
recommendations
Historical data storage and on demand 
Advanced asset algorithms for electrical access via export feature
assets to evaluate asset health 
Extended multilingual support to handle 
Advanced reporting technology with product inquires or troubleshoot problems 
automated alerts proactively
An ecient, reliable partial discharge Systematic fleet management analysis
monitoring for all the assets
Oine test data integration and analysis
A detailed comprehensive DGA analysis
17 10
Why Customers Choose Us?
RM solution, the trusted monitoring solution for over 10000+ assets across 50+ countries. 
We are a leading High Value Electrical Asset Monitoring Company integrating fibre optic 
technology to the assets.
Attention to Details A plan for Success
It’s our attention to the small stu, Our Customers are well satisfied with 
scheduling of timelines and keen project the advisory services that we oer to 
management that makes us stand out from help them with best in class 
the rest. technological performance and a long 
durable life. 
Experts only Meeting Deadlines Money Matters
We bring-in our diversified Work with us, and you’ll work We protect you 
experienced team with over with seasoned professionals – against currency 
100+ years of experience in vigilant of deadlines, and fluctuation with 
Asset Monitoring committed to exceeding client competitive and fair 
expectations. market prices
11
Our Presence Across the Globe
Head Oce
Canada
1415 Frank-Carrel, Suite 
230, Quebec, QC - G1N 
4N7, CANADA
+1-418-767-0111
Asia Pasific India Europe Latin America Middle East North America
Rugged Monitoring Services About Rugged Monitoring
Rugged Monitoring provides customization of Industry’s leading team of asset condition 
sensors, monitors & software. In addition we monitoring experts with 100+ years of 
oer on-site commissioning services, combined experience committed to delivering 
maintenance contracts and technical support to customizable solutions for challenging 
all customers worldwide. applications. We oer a range of reliable, high 
performance, customizable sensors and 
monitoring solutions that are immune to 
external influence.
ruggedmon ©2021 Rugged Monitoring Company. All rights 
reserved. Information subject to change 
[email protected] without notice. All trademarks are properties of 
www.ruggedmonitoring.com their respective companies, as noted herein.
M O N I T O R I N G  S I M P L I F I E D