Crompton Instruments Integra Ri3 Installation Guide

Installation and
Operating Instructions

Integra Ri3

DIN-rail digital meter for single
and three-phase electrical systems

Introduction

This unit measures and displays the characteristics of single-phase
two-wire, three-phase tree-wire and three-phase four-wire supplies,
including voltage, frequency, current, power and real and reactive
energy, imported and exported.

For more in-depth operating instructions, please refer to the full
manual that is available on the Crompton Instruments website, at
www.crompton-instruments.com.

Measurement

In measurement mode, the buttons control the displayed
measurement as follows:

Selects the Voltage and Frequency display screens.
Successive operations of the button select voltage,
frequency and %THD (Total Harmonic Distortion).
In Set-up mode, this is the ‘Back’ button.

Setup Menu Structure

Change password

nnnn – 4-digit number, default ‘0000’.

Supply system

3-phase 3-wire or 4-wire or single phase.

CT Set the value of the CT primary in use

nnnn – 4-digit number, 0001 to 9999.

dIT - Demand Integration Time

This is the period in minutes over which the current and power
readings are integrated for maximum demand measurement.
Options are: Off, 5, 8, 10, 15, 20, 30 and 60 minutes.

RSET Resets cumulative Energy and/or Demand

measurements to zero.

COMS Communication parameters for RS485 interface:

FMT – Format:

Modb Modbus protocol,

Baud rate 2400/4800/9600/19200/38400
Parity none/odd/even
Stop bits 1 (1 or 2 if parity is None)
Network address nnn – 3-digit number, 1 to 247
Order: Norm/Rev – Indicates Modbus word order.

N2 Johnson Controls (JC) N2 protocol,

Network address nnn – 3-digit number, 1 to 255.

Rly - Relay pulse output

kWh/kVArh (Active/reactive) Import or Export
Rate 0.001/0.01/0.1/1/10/100/1k/10k kWh or kVArh per pulse
Pulse width 200/100/60 ms.

NRGy - Energy

Unit/kilo/Mega units selection
1% limit on/off. If on, power values <1% of range max. will not
be included in energy measurements (prevents ‘creep’).

Test

Display on – all elements on to check display
dISTG – Display toggle. Each element is turned on and off
Phase sequence (V123 I123).

SOFT

Displays firmware version and build numbers.

Menu Option Selection

1. Use the (up) and (down) keys to select the required
item from the menu. Selection does not roll over between

bottom and top of list.

Selects the Current display screens. Successive
operations select phase and neutral (3ph4w) currents,
max. demanded currents and current %THD.
In Set-up mode, this is the ‘Up’ button.

Selects the Instantaneous Power screens. Successive
operations select power (W, VAr & VA), max.
demanded power and power factor.
In Set-up mode, this is the ‘Down’ button.

Selects the Energy display screens. Successive
operations select imported/exported Wh and Varh.
Display can indicate up to 9999999·9.
Running man symbol flashes as data accumulates.
1% symbol shows that power values of <1% of range
maximum will be included in energy readings.
In Set-up mode, this is the ‘Enter’ button.

Display shows the units of measurements in use for each range.
Energy units can be set via set-up screens; other units are set
automatically.

A Demand Reset resets maximum demand readings to zero.

Setting up

To enter set-up mode, firmly press the and buttons
simultaneously and hold for 5 seconds, until the password screen

appears. Setting up is password-protected so you must enter the
correct password (default ‘0000’) before proceeding. If an incorrect
password is entered, the display reverts to measurement mode.

To exit setting-up mode, press
measurement screen is restored or hold

simultaneously for 5 seconds.

repeatedly until the

and buttons

2. Press

3. If an item flashes, then it can be adjusted by the
and

e.g.

4. Having selected an option from the current menu layer, press

5. Having completed a parameter setting, press
a higher menu level. The SET indicator will be removed and
you will be able to use the

menu selection.

6. On completion of all setting-up, press
measurement screen is restored.

to confirm the selection.

(down) keys. If not, there may be a further layer,

Comms - Baud rate, before adjustment is possible. Press

to select the lower layer.

to confirm your selection. The SET indicator will appear.

(up)

to return to

and keys for further

repeatedly until the

Number Entry Procedure

When setting up the unit, some screens require the entering of a
number. In particular, on entry to the setting up section, a
password must be entered. Digits are set individually, from left to
right. The procedure is as follows:

1. The current digit to be set flashes and is set using the
(up) and (down) keys.

2. Press to confirm each digit setting. The SET indicator
appears after the last digit has been set.

3. After setting the last digit, press to exit the number
setting routine. The SET indicator will be removed.

Installation

Warnings

• During normal operation, voltages hazardous to life may

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

energised 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

Case Dimensions:

Width 71·3 mm, Depth 57·5 mm, Length 90·5 mm
Length including fixing tag 93·5 mm.

The unit is intended for mounting on a standard DIN rail. Avoid
mounting the unit where there is excessive vibration; in excessive
direct sunlight; or outside a reasonably stable ambient temperature
of -10 to +55°C.

Safety

The unit is designed in accordance with BS EN 61010-1:2001
(IEC 61010-1:2001) – Permanently connected use, Normal
condition. Installation category III, pollution degree 2, basic
insulation for rated voltage. Measurement Category III.

EMC Installation Requirements

Whilst this unit complies with all relevant EU EMC (electro-magnetic
compatibility) regulations, any additional precautions necessary to
provide proper operation of this and adjacent equipment will be
installation dependent and so the following can only be general
guidance:

• Avoid routing wiring to this unit alongside cables and products
that are, or could be, a source of interference.

• The auxiliary supply to the unit should not be subject to
excessive interference. In some cases, a supply line filter may
be required.

• To protect the product against incorrect operation or permanent
damage, surge transients must be controlled. It is good EMC
practice to suppress transients and surges at the source. The
unit has been designed to automatically recover from typical
transients; however in extreme circumstances it may be
necessary to temporarily disconnect the auxiliary supply for a
period of greater than 5 seconds to restore correct operation.

• Screened communication leads are recommended and may be
required. These and other connecting leads may require the
fitting of RF suppression components, such as ferrite absorbers,
line filters etc., if RF fields cause problems.

• It is good practice to install sensitive electronic instruments that
are performing critical functions in EMC enclosures that protect
against electrical interference causing a disturbance in function.

Wiring

Input connections are made to screw clamp terminals. Choice of
cable should meet local regulations for the operating voltage and
current.

The current inputs of these products are designed for
connection into systems via current transformers only.

All negative current inputs are commoned inside the unit and
grounding should be at one point only. To minimise measurement
errors, the CTs should be grounded as shown in the wiring
diagram.

CT secondaries must be grounded in accordance with local
regulations. It is desirable to make provision for shorting links to be
made across CTs to permit easy replacement of a unit should this
ever be necessary.

Additional considerations for three wire systems

The neutral terminal (terminal N) is indirectly connected to the
voltage input terminals (terminals L1, L2, L3). When connected to
a three wire system the neutral terminal will adopt a potential
somewhere between the remaining lines.

If external wiring is connected to the neutral terminal it must be
connected to either the neutral line or earth (ground) to avoid the
possibility of electric shock from the neutral terminal.

Fusing

This unit must be fitted with external fuses in voltage and auxiliary
supply lines. Voltage input lines must be fused with a quick blow
fuse 1A maximum. Auxiliary supply lines must be fused with a slow
blow fuse rated 1A maximum. Choose fuses of a type and with a
breaking capacity appropriate to the supply and in accordance with
local regulations.

A suitable switch or circuit breaker should be included in the
installation. It should be positioned so as to be easy to operate, in
close proximity to the equipment, and clearly identified as the
disconnecting device.

Earth/Ground Connections

For safety reasons, current transformer secondary connections
should be grounded in accordance with local regulations. Under no
circumstances should this product be operated without this earth
connection.