TE Connectivity DRS-100-3P User Manual

1 Introduction
This document provides operating, maintenance and installation
instructions. This unit measures and displays the characteristics
of Single Phase Two Wire (1P2W), Three Phase Three Wire
(3P3W) and Three Phase Four Wire (3P4W) networks. The
measuring parameters include Voltage (V), Current (A),
Frequency (Hz), Power (kW/KVA/KVAr), Power Factor (PF),
Imported, Exported and Total Energy (kWh/kVArh).The unit also
measures Maximum Demand Current and Power, this is
measured over preset periods of up to 60 minutes.
It also comes with a complete comms capability with built in
Pulse and RS485 Modbus RTU outputs, configuration is
password protected.
This unit is 10(100)A direct connected. Configuration is password
protected.
1.1 Unit Characteristics
The DRS-100-3P can measure and display:
• Phase to Neutral Voltage and THD% (Total
Harmonic Distortion) of all Phases
• Line Frequency
• Current, Maximum Demand Current and Current
THD% of all Phases
• Power, Maximum Power Demand and Power Factor
• Imported, Exported & Total Active Energy
• Imported, Exported & Total Reactive Energy
The unit has a Password-Protected set up menu for:
• Changing the Password
• System Configuration - 1P2W, 3P3W, 3P4W.
• Demand Interval Time
• Reset for Demand Measurements
• Pulsed Output Duration
1.2 RS485 Serial – Modbus RTU
RS485 serial port with Modbus RTU protocol to provide a means
of remotely monitoring and controlling the Unit. Set-up screens
are provided for setting up the RS485 port. Refers to section 4.8.
1.3 Pulse output
Two pulsed outputs that can be set for active (kWh) or reactive
(kVArh) energy.
2 Start Up Screens
The first screen lights up all
display segments and can be used
as a display check.
The second screen indicates the
firmware installed in the unit and
its build number.
Please note: Values may vary from
the numbers shown here.
The interface performs a self-test
and indicates the result if the test
passes.
*After a short delay, the screen will display active energy
measurements.
3 Measurements
The buttons operate as follows:
Selects the Voltage and Current display screens. In
Set-up Mode, this is the “Left” or “Back” button.
Select the Frequency and Power factor display
screens. In Set-up Mode, this is the “Up” button.
Select the Power display screens.
In Set-up Mode, this is the “Down” button.
Select the Energy display screens. In Set-up mode,
this is the “Enter” or “Right” button.
3.1 Voltage and Current
Each successive press of the button selects a new
parameter:
Phase to neutral voltages.
Phase to Line voltages
Current on each phase.
Voltage THD% per phase
Current THD% per each phase.
3.2 Frequency and Power Factor and Demand
Each successive press of the button selects a new range:
Frequency and Power
Factor (total).
Power Factor of each phase.
Maximum Current
Demand.
Maximum Power Demand.
3.3 Power
Each successive press of the button select a new range:
Instantaneous Active
Power in kW.
Instantaneous Reactive Power in
kVAr.
Instantaneous Volt-Amps in KVA.
Total kW, kVArh, kVA.
3.4 Energy Measurements
Each successive press of the button selects a new range:
Total active energy in kWh.
Total reactive energy in kVArh.
Imported active energy in kWh.
Exported active energy in kWh.
Imported reactive energy in kVArh.
Exported reactive energy in kVArh.
Please note the register is 9999999.9 display over two lines.
Warnings
 During normal operation, voltages hazardous to life
may be present at some of the terminals of this unit.
 At voltages below that specified in the Range of Use
the meter may shut down. However, voltages
hazardous to life may still be present at some of the
terminals of this unit.
 Installation and servicing should be performed only
by qualified, properly trained personnel abiding by
local regulations.
 Ensure all supplies are de-energised before
attempting connection or other procedures.
 Terminals should not be user accessible after
installation and external installation provisions must
be sufficient to prevent hazards under fault
conditions.
 This unit is not intended to function as part of a
system providing the sole means of fault protection -
good engineering practice dictates that any critical
function be protected by at least two independent and
diverse means.
 The unit does not have internal fuses therefore
external fuses must be used for protection and safety
under fault conditions.
 Never open-circuit the secondary winding of an
energized current transformer.
 This product should only be operated with the CT
secondary connections earthed.
 If this equipment is used in a manner not specified by
the manufacturer, protection provided by the
equipment may be impaired.
Caution: Risk of
Electric Shock
User Manual
DRS-100-3P
DIN Rail Energy Meter for Direct Connected
Three Phase Electrical Systems up to
100 Amps

TE Connectivity DRS-100-3P Specifications

General

Brand	TE Connectivity
Model	DRS-100-3P
Category	Measuring Instruments
Language	English

Summary

1 Introduction

1.1 Unit Characteristics

Lists measured parameters: Voltage, Current, Frequency, Power, Energy, and THD%.

1.2 RS485 Serial - Modbus RTU

Details RS485 serial port with Modbus RTU for remote monitoring and control, including password protection.

1.3 Pulse Output

Two pulsed outputs configurable for active (kWh) or reactive (kVArh) energy.

2 Start Up Screens

3 Measurements

3.1 Voltage and Current

Displays Phase to Neutral/Line voltages and current on each phase, including THD%.

3.2 Frequency and Power Factor and Demand

Shows Frequency, Power Factor (total and per phase), and Maximum Current Demand.

3.3 Power

Displays instantaneous Active Power (kW), Reactive Power (kVAr), and Volt-Amps (kVA).

3.4 Energy Measurements

Shows Total Active/Reactive Energy and Imported/Exported Active/Reactive Energy.

4 Set Up

4.1 Set-up Entry Methods

Details navigation, option selection, and number entry.

4.2 Communication

Configuration for RS485 Modbus RTU: address, baud rate, parity, and stop bits.

4.3 Pulse Output

Configuration of pulse output: rate and duration (pulse width).

4.4 Light Period (LP)

Sets the time in minutes before the display backlight goes into standby.

4.5 Supply System

4.6 CLR

4.7 Change Password

4.8 DIT Demand Integration Time

5 Specifications

5.1 Measured Parameters

Lists measured parameters including Voltage, Current, PF, Frequency, Demand, and Energy types.

5.2 Measured Inputs

Describes voltage input types (1P2W, 3P3W, 3P4W) and frequency measurement source.

5.3 Accuracy

Provides accuracy percentages for Voltage, Current, Frequency, Power, and Energy measurements.

5.4 Interfaces for External Monitoring

Details connectivity options: RS485 Modbus RTU and pulse output.

5.5 Reference Conditions of Influence Quantities

Lists ambient conditions affecting measurement accuracy like temperature and waveform.

5.6 Environment

Specifies operating/storage temperatures, humidity, altitude, and vibration limits.

5.7 Mechanics

Details DIN rail dimensions, mounting, sealing, material, and self-extinguishing properties.

6 Installation and Maintenance

6.1 Installation notes

Advises on dry position, stable ambient temperature, and vibration minimization for installation.

6.2 Input Wiring and Fusing

Guidance on selecting appropriate fuses and switches for supply isolation.

6.3 Wire Size

Specifies the acceptable wire size for voltage and current terminal blocks.

6.4 Maintenance

Instructions for cleaning the case and notes on non-user serviceable parts.

7 Declaration of Conformity

8 Meter

8.1 Dimensions

Provides the physical dimensions of the meter unit.

8.2 Appearance

Shows the external appearance and model number of the device.

9 Wiring Diagram

9.1 Single phase two wires

Illustrates the wiring connections for a single-phase two-wire system.

9.2 Three phase three wires

Illustrates the wiring connections for a three-phase three-wire system.

9.3 Three phase four wires

Illustrates the wiring connections for a three-phase four-wire system.