PSL PQube 3 User Manual
1
PQube® 3 RM8 Module
User Guide
Revision 1.0
PQube 3 RM8 Module User Guide v1.0.docx
Power Standards Lab, 980 Atlantic Ave, Alameda CA 94501, USA
Tel ++1-510-522-4400 Fax ++1-510-522-4455 www.powerstandards.com
PQube® 3 RM8 Module User Guide
Symbol
Meaning
Caution. Consult this manual in all cases where this
symbol is marked, in order to find out the nature of
the potential hazards and any actions which have
to be taken to avoid them.
Caution. Risk of electric shock
Alternating current
Alternating current (a.c.) or direct current (d.c.)
Double or Reinforced insulation
Functional earth terminal not relied on for safety
WARNING: Death, serious injury, or fire hazard could result from improper connection or
operation of this instrument. Carefully read and understand manual before connecting this
instrument.
AVERTISSEMENT: Si l'instrument est mal connecté, la mort, des blessures graves, ou un
danger d'incendie peuvent s'en suivre. Lisez attentivement le manuel avant de connecter
l'instrument.
WARNUNG: Der falsche Anschluß dieses Gerätes kann Tod, schwere Verletzungen oder Feuer
verursachen. Bevor Sie dieses Instrument anschließen, müssen Sie die Anleitung lesen und
verstanden haben.
ADVERTENCIA: Una conexión incorrecta de este instrumento puede producir la muerte,
lesiones graves y riesgo de incendio. Lea y entienda el manual antes de conectar.
If this equipment is used in a manner not specified by the manufacturer, the protection provided by
the equipment may be impaired. Installation, service, and maintenance of your PQube must only
be done by an expert for electrical installations.
© 2008-2016 Power Sensors Ltd. All rights reserved. No parts of this document may be copied,
reproduced, or translated to another language without the prior written consent of Power Sensors
Ltd. “PQube” is a registered trademark of Power Sensors Ltd. “Windows” “Excel”, and “PowerPoint”
are registered trademarks of Microsoft Corporation.
The information contained in this document is subject to change without notice.
PSL MAKES NO WARRANTY OF ANY KIND WITH REGARD TO THIS MATERIAL, INCLUDING, BUT NOT
LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
USE.
PSL shall not be liable for errors contained herein or for incidental or consequential damages in
connection with the furnishing, performance, or use of this material. If you do not accept this
limitation on liability, please return the product to PSL prior to use.
Produced in the United States of America.
Page 2 of 13
PQube® 3 RM8 Module User Guide
Table of Contents
Introduction 4
What is the RM8 Module for the PQube® 3? ............................................................................... 4
Overview of Connections 5
Specifications 5
RM8 Module Installation 6
General Installation Procedures .................................................................................................. 6
Example Wiring Diagram 6
1. Install the RM8 module onto the DIN rail 6
2. Slide the PQube 3 and all modules together 6
3. Make all the voltage and current connections to the PQube 3 7
4. Install interposing relays to switch high-power loads 7
5. Connect RM8 relays to an external voltage source 8
6. Apply power to PQube 3 and verify meter readings 8
Disconnect mains prior to servicing ............................................................................................. 8
Define your 3-phase loads ........................................................................................................... 8
1. Select your PQube 3 model 8
2. Assign labels to each branch 9
Setting thresholds for each relay ............................................................................................... 10
1. Define threshold, hysteresis, and threshold polarity 10
2. Define latch setting and normal state 13
Additional PQube Information .................................................................................................. 13
Page 3 of 13
PQube® 3 RM8 Module User Guide
Introduction
What is the RM8 Module for the PQube® 3?
The RM8 Module is an optional expansion module for your PQube 3 Power Analysis System. It adds
8 programmable signal relay outputs to your PQube 3. These can be useful for load shedding, alarms,
and notifications to system operators.
Typical use case: Monitor branch circuits powering critical loads (CL). Upon a rise above preset
power thresholds or other alarm conditions, the RM8 Module turns off non-critical loads (NCL).
Features
• Each RM8 module can control up to 8 individual non-critical loads
• Monitors up to two branch circuits with the standard PQube 3, and up to four branch circuits with
the PQube 3e.
• For each relay, set trigger thresholds based on the power consumption on any given branch circuit.
IMPORTANT: the RM8 module contains 8 programmable signal relays. Do not attempt to use the
RM8 relays for directly switching power to loads greater than the rated value (2 Amps max at max
60VDC/30VAC). While LEDs and other low-voltage low-current loads can be switched directly with
the RM8, in the typical case RM8 are used to switch the coil of an interposing power relay that
controls power flow of the switched loads.
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