MDG15 (Version 7 January 2018) – “6.3. Isolation and energy dissipation
A person should not carry out repairs to mobile or transportable plant unless all energy sources is isolated and cannot be reconnected accidentally before it is safe to do so.
The system of isolation adopted should incorporate a tagging system, a locked isolation system or permit system and in any case, should also include a method of verification that isolation and/or energy dissipation is effectively established. Human error should be considered when selecting the type of isolation system”.
The MECP code, AS 4024.1603 and MDG 40 provided guidance on energy isolation
- AS4024.1603 requires that isolation devices be equipped with clear and unambiguous identification of their isolation state. It also requires that isolation devices be designed, selected and arranged so that reliable verification of the effectiveness of the isolation can be carried out. Reliable verification should not be pilot lamps/LED’s or trying the ignition. (Continually climbing stairs to do so, adds another element of risk).
The LECHCUST386 (previously an LSLIVC by Lingona) Isolation Verification control module 12/24VDC device is designed to implement a safe working environment for all employees, allowing compliance with AS4871.6.2013, clause 188.8.131.52. – “Where a double pole isolator is used, verification of correct operation of both poles should be addressed within the maintenance management system for the plant.”
The voltage indication is a true reference voltage with isolation verification, 4 options available through an easy selection process on an internal DIP SWITCH and a second DIP SWITCH for voltage application of either 12v or 24v DC.
The isolation verification control also measures the difference between the isolator battery and machine side and determines if there is a voltage drop to capture isolator internal connection failures. Also, if the case that the machine’s isolator is turned off whilst the machine is running, the isolation control will measure the voltage drop between the battery and the machine to determine this occurrence.
It will then activate a warning LED/alarm and with a 20-second delay interlock relay, to cut out either ignition or start solenoid depending on the customers requirements. By selecting the required DIP switch, the below image screen will change to suit the below desired options available.
** Note – you may also need to use a Hummingbird HMLI018 9-36V input/13.8V DC output, Switched Voltage Converter on some installations, for this device to function correctly**