Information on RCBO/RVD-EMR
Many people think that the RCBO/RVD-EMR is not mentioned in the Standards AS/NZS 3001-2-2022. It is, but not by name. Here are some of the reasons why.
CLAUSE 2.7.5 EXCEPTION
THE NEUTRAL EARTH CONNECTION need not be made where the isolated output source is provided with an INSULATING MONITORING DEVICE. The device complying with clause 2.7.8 PROVIDES AUTOMATIC OF SUPPLY ON OCURENCE OF A SECOND FAULT TO EARTH.
AN RVD DEVICE IS AN INSULATION MONITORING DEVICE and complies with 2.7 of AS/NZS3001.2.22 SWITCHING: 3.8.2.2
2.6.4 PROTECTION AGAINST INCORRECT POLARITY.
As per AS/NZS 3001.2:2022 Page 24 2.6.4 to 2.6.4.2
The use of a Transposition Sensor is mentioned in AS/NZS 3001-2022 which came into force on 18Th November 2023. Transposition sensor is commonly referred to as a reverse polarity sensor.
The combined RCBO/RVD-EMR senses and rejects incorrect polarity.
RVDSAFE®-EMR rejects reverse polarity from mains connections and protects the use of Generators and Inverters plugged into all vehicles requiring 240V power where RCD protection does not work.
“For every single-phase external supply, protection against transposition of the active and neutral conductors of the supply shall be by one of the following methods(a) TRANSPOSITION SENSOR.” The RCBO/RVD-EMR is also a transposition sensor.
Switches that directly control low voltage socket outlets shall operate in all live active and neutral conductors.
EXCEPTION
Where an isolating transformer or electrical converter with a polarized output or a transposition sensor is installed in accordance with clause 2.6.4 for each external supply the switches may operate in the active conductor only.
Following are snippets of AS/NZS3001.2.2022.
AS/NZS3001.2.2022
The Standard does not attempt to include every INSTALLATION METHOD but CONTAINS INSTALLATION METHODS which are considered by industry to be the most commonly used for CONECTABLE ELECTRICAL INSTALLATIONS that are consistent with A/S NZS 3000.
The General principle and requirements of AS/NZS3000 apply for the application of this standard.
DEEMED TO COMPLY
The term DEEMED TO COMPLY means that a requirement can be met by following a SPECIFIED STANDARD or METHOD so when an installation is carried out in accordance with a SPECIFIED STANDARD or METHOD the installation is DEEMED TO COMPLY WITH THE STANDARDS of this STANDARD.
CONFORMANCE to a DEEMED to COMPLY shall and may EXCEED the MINIMUM REQUIREMENTS of This STANDARD.
PROVISION FOR REVISION
The Standard is not INTENDED TO DISCOURAGE INVENTION or to EXCLUDE MATERIALS, EQUIPMENT and METHODS that may be developed. Revisions may be made from time to time and in view of such developments amendments to this edition will be made were essential.
NOW, ON TO THE PRODUCTS…