10
1.4.3 Electrical
Connections
The wiring to the Vapac should be done by a qualified
electrician. The external overcurrent protection and wiring
should comply with the appropriate Regulations and Codes of
Practice
.
Important:
Make sure the connection to the primary Voltage
winding of the Vapac transformer matches the supply Voltage
which is to be connected between Vapac terminals A1 & A2.
If
the actual (measured) site voltage is 400v the preferred
tapping is 380V
.
A fused disconnect/isolator or MCB should be used to
disconnect the supply from all electrodes simultaneously.
This must be sized to suit the total maximum phase/line
current of the unit and should be located adjacent to the
Vapac cabinet or within easy reach and readily accessible.
In Vapac VAPANET units terminals A1, A2 and A3 are for the
power supply connections as indicated in the diagrams below
(twin cylinder units have two supplies A1,A2,A3 & B1,B2,B3).
Twin cylinder units’ have terminals for the connection of two
power supply input circuits. On twin cylinder units’ this allows
individual external protection of each steam cylinder. Fused
disconnect/isolator or MCB provision must be linked to
ensure both 3 phase supply inputs are disconnected
simultaneously.
1.4.4 Cable
Entry
Provision
Cable glands must be used to ensure cables are held
securely at the entry position. All Vapac cabinets are
equipped with a removable gland-plate. The installing
electrician should remove this and take it to a work-bench to
drill for the required cable gland size.
1.4.5
Vapac Control Circuit Transformer
The internal control circuit of the Vapac unit operates at
24Vac - the transformer secondary is set at 24V.
As standard the Vapac VAPANET includes a transformer with
alternative primary winding options 200V, 230, 380, 415, and
440V and requires on site adjustment to match it to the
Voltage connected to Vapac terminals A1 and A2.
The transformer also has a 9V secondary tapping which
provides power to the VAPANET 1150630 PCB.
Important:
The Vapac transformer must
NOT
be used to
power other equipment or the warranty will be invalidated.
Notes:-
1. All units must have a PE earth connection connected to the units terminal.
2.
Unit with N.A. in the following tables means NOT AVAILABLE there is not a unit available to run at the voltage
and phases shown. Please check that the correct model reference is ordered and installed, for the low or high
voltage required, and at the desired steam output.
3.
Standard design is for 50 Hz. Supplies. Design for 60 Hz. Also available - 60 Hz. Supply must be specified with
order as the standard pump is only 50Hz.
FOR FULL ELECTRO-MAGNETIC COMPATIBILITY A NEUTRAL CONNECTION IS REQUIRED FOR ALL PROPORTIONAL
UNITS AS INDICATED IN THE CONNECTION DIAGRAMS ON THE FOLLOWING PAGES.
