Combined Energy CET-HD-PM2-1 Operational manual

Power Meter
CET-HD-PM2-1
Product User Manual
CET-HD-PM2-1 Power Meter User Manual (V9) 1

Table of Contents
Safety Notices 3
Compliance with Local Wiring Rules and Network Requirements 4
Introduction 5
Technical Specifications 6
Product Features 7
Installation Guide 8
Wiring Examples 8
Single-Phase System 8
Three-Phase System 9
Mount the Enclosure Base 10
Connect LV Power Supply Cables 14
Connect CT Harness and Data Cables 16
Ethernet Connection Installation 20
RS485 Serial Connection Installation 21
RS485 Filter for Goodwe DNS, TDS, ES G2 (ES-20) Inverters 22
External Contactor Control using TRIAC output 24
Compatible Contactors 24
Installation Instructions 25
CT Harness and CT Bundles 26
CT Bundle Labelling 27
Meter Configuration 28
Button 29
Identify Blink 29
CET-HD-PM2-1 Power Meter User Manual (V9) 2

Safety Notices
1. Please read and follow the warning and instructions contained in this document carefully.
2. This product must not be operated outside of the specified Operating Temperature Range.
3. Do not connect this product to a power supply outside of the range specified in the Technical
Specifications.
4. This device should be installed by technically qualified personnel. Failure to install in
compliance with national and local electrical codes and according to recommendations
provided by Combined Energy Technologies may result in electrical shock or fire hazard,
unsatisfactory performance, or equipment failure.
5. Repair and maintenance of this product can be performed by qualified service personnel only.
Do not attempt to repair the product if damaged. If the product is damaged or inoperable
please contact Combined Energy.
6. This product is not intended for use by persons (including children) with reduced physical,
sensory or mental capabilities, or lack of experience or knowledge, unless they have been
given supervision or instruction concerning use of the product by a person responsible for
their safety.
7. When installed, a readily accessible disconnect device (e.g. circuit breaker) must be
incorporated external to this product.
CET-HD-PM2-1 Power Meter User Manual (V9) 3

Compliance with Local Wiring Rules and Network
Requirements
The recommendations in this document do not relieve Installers of their responsibility to ensure that all
wiring operations are performed in compliance with the latest version of AS/NZS 3000 and any
additional requirements imposed by the DNSP (Distribution Network Service Provider). Specific DNSP
requirements may include meeting higher levels of protection. Where there is conflict between the
recommendations in this document and the requirements of AS/NZS 3000 and/or DNSP network
connection rules, the latter should take precedence.
It is the responsibility of Installers to comply with the requirements of any other authority who has
jurisdiction over the installation. It is also the responsibility of the Installer to ensure they are suitably
qualified under relevant state and federal laws to legally carry out the installation works.
Care must be taken to ensure both mains (LV – Low Voltage) wiring and communications (e.g.
Ethernet) cabling is installed strictly in accordance with AS/NZS 3000 (latest version) requirements for
“Segregation of different voltage levels” and that AS/NZS 3000 (latest version) requirements of double
insulation are met for LV and ELV wiring. Any further DNSP network connection requirements
beyond those mandated by AS/NZS 3000 (latest version) must also be adhered to.
Note: When calculating “highest voltage present” as defined in AS/NZS 3000, in 3 phase installations
the highest voltage present is across phases and hence greater than that of a single phase
installation.
CET-HD-PM2-1 Power Meter User Manual (V9) 4

Introduction
The CET-HD-PM2 Power Meter (“PM2”) is a three-phase six-channel power meter and load
controller for use in Combined Energy home energy management systems.
The CET-HD-PM2 accepts up to six clip-on current transformers (CTs) for monitoring net
energy flow to the site in addition to solar inverters and other loads of interest.
The wired Ethernet and RS485 interfaces enable the integration of a wide range of
third-party solar inverters, battery inverters, and control systems.
CET-HD-PM2-1 Power Meter User Manual (V9) 5

Technical Specifications
Type: Combined Energy Power Meter
Model: CET-HD-PM2-1
Power Supply Input: 100 - 240VAC 1W + N 50/60Hz 80-30mA
Metering Input: 100 - 240VAC 3W + N + E 50/60Hz 1mA
Average power consumption: <8W
Dimensions: 203 x 100 x 74mm
Mass: 0.57kg
Operating Temperature Range: 0C to +50C
IP Rating: IP56 (when installed according to the instructions in this User Manual)
Standards:
● IEC 60950-1, AS/NZS 60950-1 - Information Technology Directive
● EN 50561-1 – Electromagnetic Compatibility for PLC products
CET-HD-PM2-1 Power Meter User Manual (V9) 6

Product Features
Power Metering:
●Three-phase voltage (L-E)
● 6 current channels (clip-on CT)
● Voltage (L-N), Current, Frequency, Power Factor, Active/Reactive Power,
Active/Reactive Import/Export Energy, Phase-Phase angle
●Class 1 accuracy
● MASS-compliant frequency trigger and logging functionality
Communications Interfaces:
● 1 x Power-Line Communications (PLC) modem
● 1 x Wired Ethernet (RJ45, 10/100 Base-T)
● 1 x RS485 port (RJ11, Serial / Modbus RTU)
Outputs:
● 1 x 50mA TRIAC output for control of third-part relay/contactor
Human Interfaces:
● 1 x Front panel button for manual network reset and diagnostics view
● 2 x LED status indicator (built into front panel button)
Included Accessories:
● Enclosure mounting accessories
Optional Accessories:
● Combined Energy CT Bundles (up to 2)
○ Standard ratings of 60A, 120A and 200A with 3 CTs per Bundle
○ Larger CT Bundles rated to 400A, 800A and 1200A available on request
● Combined Energy CT Harness (required to connect CT Bundles to Power Meter)
○ Available in 0.5m and 3m lengths
CET-HD-PM2-1 Power Meter User Manual (V9) 7

Installation Guide
Wiring Examples
Single-Phase System
The following is an example wiring diagram for a typical single-phase installation:
The CET-HD-PM2-1 must be protected by an upstream protection device (or a combination
of devices) with a trip current of 32A or less and an earth-leakage trip current of 30mA or
less.
The CET-HD-PM2-1 must be installed with a disconnect device. The disconnect device shall
disconnect simultaneously all line conductors of the AC MAINS SUPPLY.
CET-HD-PM2-1 Power Meter User Manual (V9) 8

Three-Phase System
The following is an example wiring diagram for a typical 3-phase installation:
In a three-phase system it is necessary to connect a reference for each phase of the supply
to the CET-HD-PM2-1, in addition to the Neutral and Earth connections.
The CET-HD-PM2-1 must be protected by an upstream protection device (or a combination
of devices) with a trip current of 32A or less and an earth-leakage trip current of 30mA or
less.
The CET-HD-PM2-1 must be installed with a disconnect device. The disconnect device shall
disconnect simultaneously all line conductors of the AC MAINS SUPPLY.
CET-HD-PM2-1 Power Meter User Manual (V9) 9

Mount the Enclosure Base
1. Select a location to mount the CET-HD-PM2. The product can be mounted inside the
electrical switchboard or behind the panel (with reference to local installation rules),
or may be surface mounted externally.
Note: Ensure the product is mounted close enough to the switchboard so that
the selected CT Harness and CT Bundles can reach the required metering
points in the switchboard.
2. If the product is installed outdoors, all conduit ports (including unused ports) and
mounting screw positions must be sealed with silicone adhesive or PVC glue to
maintain the product's IP rating.
3. Install the enclosure base using the included mounting accessories (screws,
neoprene washers, wall plugs):
CET-HD-PM2-1 Power Meter User Manual (V9) 10

4. Ensure that the enclosure base is mounted flat against the surface and that the base
is not warped. If the enclosure base is warped the lid will not seal to the base
correctly and the product IP rating may be compromised:
5. Ensure that the included neoprene washers are used when fastening the wall
mounting screws:
CET-HD-PM2-1 Power Meter User Manual (V9) 11

6. Silicone adhesive should be used to seal the mounting screws if the product is
installed outdoors:
7. Press the included plastic screw covers into the mounting screw holes:
CET-HD-PM2-1 Power Meter User Manual (V9) 12

8. Install all required power and data conduit and cables into the enclosure base.
9. All enclosure openings must be sealed to ensure the product is waterproof.
Conduit glands and plugs must be sealed with PVC cement or a silicone
adhesive.
CET-HD-PM2-1 Power Meter User Manual (V9) 13

Connect LV Power Supply Cables
10. Connect the 240VAC supply cables to the terminal block assembly.
Neutral, Earth and at least one Line connection (Phase A) is required for the product
to function.
If the CET-HD-PM2 is being used to monitor a 2-phase or 3-phase supply, one
reference must be connected for each additional phase (to the Phase B and Phase C
positions on the terminal block).
CET-HD-PM2-1 Power Meter User Manual (V9) 14

11. All power supplies to the CET-HD-PM2 must be protected by an upstream protection
device (or a combination of devices) with a trip current of 32A or less and an
earth-leakage trip current of 30mA or less.
The CET-HD-PM2 must be installed with a disconnect device. The disconnect device
shall disconnect simultaneously all line conductors of the AC MAINS SUPPLY.
CET-HD-PM2-1 Power Meter User Manual (V9) 15

Connect CT Harness and Data Cables
12. If a CT Harness is being installed with the CET-HD-PM2, connect the CT Harness
cable to the USB-C port:
The USB-C cable should be secured in place using the supplied cable tie:
13. If an Ethernet connection is required (e.g. for a data connection to a solar Inverter),
please see the Ethernet Connection Installation section for more details
14. If an RS485 connection is required (e.g. for a data connection to a solar Inverter),
please see the RS485 Serial Connection Installation section for more details
CET-HD-PM2-1 Power Meter User Manual (V9) 16

Assemble Enclosure and Perform Functional Tests
15. Secure the enclosure lid to the base using the 6 supplied screws.
Ensure the rubber gasket is properly seated on the enclosure lid during this
process and does not get pinched or fouled by the enclosure.
Check that there are no debris or tears on the gasket prior to assembly which could
compromise the waterproof seal.
CET-HD-PM2-1 Power Meter User Manual (V9) 17

CET-HD-PM2-1 Power Meter User Manual (V9) 18

16. Once the lid has been secured, apply power to the CET-HD-PM2 and check it is
operating correctly. The button will illuminate when power is applied and turn red (if
there is no EMU in range) or green (if the site EMU is installed and communicating
with the CET-HD-PM2 correctly):
17. When correct operation of the device has been confirmed, insert the plastic screw
caps into the 6 lid screw positions:
Important: these plastic caps must be fitted to ensure the product remains
weatherproof.
CET-HD-PM2-1 Power Meter User Manual (V9) 19

Ethernet Connection Installation
1. Using a flat blade screwdriver, carefully remove the breakout tab covering the RJ45
"Ethernet" port:
2. Connect the remote equipment to the RJ45 port using a double insulated Ethernet
cable (e.g. Clipsal 5005C305B).
CET-HD-PM2-1 Power Meter User Manual (V9) 20