Appendix F. Civil Engineering Report Part 2

                                        SPEL Automatic Alarm/Monitoring System

Control unit (electrical connections)                    Probe
1. Mains voltage connection;                             The probe is installed freely suspended in the SPEL separator within the probe
The control unit should be connected to a suitable       protection tube. The 3-core cable is connected into the junction box mounted in
220/240V AC supply and fused at 3 amps.                  the access shaft above the probe protection tube. Extra cable is provided to enable
                                                         raising the junction box where extension shafts are incorporated.
Note: This appliance must be earthed.
                                                         Important note: In all cases good, standard electrical practice should be followed
2. Control unit/probe junction box connection            and the installation must conform to the Australian Wiring Rules – AS 3000 – 2007.
Wiring from the control unit to the probe junction box   In essence, the installation must be such that the intrinsic safety is
in the separator chamber requires a 3-core screened.     no compromised by:
0.75mm core section cable.
                                                           • Exposure to risk of mechanical damage
Maximum cable length: 300 metres.
                                                           • Unauthorised modification of interference
3. Probe connection
                                                           • Exposure to moisture, dust and foreign bodies
A 5 metre 3-core probe cable is normally fitted to the
junction box and the probe.                                • Excessive heat

After all connections have been made, the cables must      • Invasion of intrinsically safe circuit by other electrical equipment or circuitry
be secured by tightening each entry gland.
                                                         Certificate of conformity
                                                         The alarm device has been approved to be used in explosion-hazardous areas. The
                                                         control unit and probe are approved according to ATEX Directive 94/9/EC. These
                                                         approvals mean that the probes can be installed in Zone 0, which is continuously
                                                         explosion-hazardous.
                                                         The SPEL oilset control unit must be located in the safe area, but it can be
                                                         connected to the probe without any barrier.

                                                         Tests (10.2)
                                                         The function can be tested by lifting the probe within the probe protection tube. In
                                                         approximately 5 seconds, the alarm is given by a red light and audible signal. Both
                                                         relays release. Push the RESET button - the buzzer goes off and relay pulls in.
                                                         When the probe is placed in water again, relay pulls in and the red light goes off.

                                                         Cable break and short circuit test
                                                         Also the function can be tested in case of cable fault or short circuit. First cause
                                                         short circuit in probe cable terminals 1 and 2. Then the yellow light of short circuit
                                                         is lit. Both the relays pick up and the buzzer goes on. Remove the short circuit and
                                                         reset the buzzer.

                                                         Simulated Function Test
                                                         The function of probe, cable and electronics can be tested. Push the TEST button for
                                                         2 to 5 seconds. Both relays pick up, and the red light is lit. When the TEST button is
                                                         released, the red light goes off and relay returns to its normal position. The buzzer
                                                         and relay must be reset.

                                                         Installation
                                                         Important note: It is important that installation is carried out by a competent
                                                         technician familiar with this type of equipment or contact our Special Products
                                                         Division for installation, commissioning and maintenance service.




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