Table of Contents
Advertisement
Hydran* M2-X Instruction Manual
10 Decommissioning the Hydran M2-X
The Hydran M2-X is designed to be permanently installed for autonomous opera-
tion on a transformer. If however, the Hydran M2-X must be decommissioned, the
procedure to be followed is described in this chapter.
10.1 Powering-off
WARNING
1. Switch OFF the circuit breaker to which the power cable of the Hydran M2-X
unit is connected.
2. Verify, with a voltmeter, there is no AC or DC voltage on the power cable.
3. Disconnect the power cable from the circuit breaker.
4. Remove the cover of the Hydran M2-X unit to be decommissioned.
5. Verify there is no AC or DC voltage on the mains supply terminals of the unit.
6. Verify there is no AC or DC voltage on the cables connected to the analog
inputs, analog outputs or/and digital inputs if present.
7. Verify there is no AC or DC voltage on the cables connected to the alarm
relays.
8. Verify there is no AC or DC voltage on the cable connected to the RS-485
terminals.
9. If any of the cables is still fed by an external source, identify and isolate the
source.
10.2 Cable Disconnection
After verification that there is no AC or DC voltage on all cables connected to the
Hydran M2-X unit, proceed as following:
1. Disconnect the power supply cable and remove this cable.
2. Disconnect the cables from the analog inputs, analog outputs or/and digital
inputs if installed and remove these cables.
3. Disconnect the cable from the alarm relays terminals and remove this cable.
4. Disconnect the cable from the RS-485 terminals and remove this cable.
5. Disconnect the ground cable from the ground lug.
MA-029
Rev. 1.0, 30-Jul-18
The following procedure must be carried out
thoroughly. Failure to do so may result in property
damage, personal injury and/or death.
The decommissioning of the Hydran M2-X must be
executed by trained service personnel only.
Page 143
Advertisement
Table of Contents
