KROHNE VARIFLUX IFS 6000 EN - Manual (Page 9)

9
Supply power > 50 V AC
•
Grounding is via the PE protective ground conductor incorporated in the power supply
cable, see also Section “Connection to power” in the installation and operating instructions
for the signal converter.
• EXCEPTION: Do not connect up the PE protective ground conductor in the terminal
box if e.g. compact units are operated in the proximity of electric furnaces, electrolysis
plants, etc., and large potential differences occur in the pipeline system. An FE functional
ground must simultaneously take over the function of the protective conductor (combined
protective/functional ground). Refer to appropriate national codes for specific requirements
for this type of installation, which may require the addition of a ground fault detection
circuit interrupter.
Power supply 24 V AC or DC
•
Protective separation (PELV) must be ensured (VDE 0100/VDE 0106 or IEC 364/IEC 536
or equivalent national regulations).
• An FE functional ground conductor must be connected for measurement reasons.
Compact systems
Grounding diagrams
Flowmeter with flange connections and grounding rings
D1 O-ring gaskets
D2 Gaskets, not included with flowmeter,
to be provided by customer (standard
flat gaskets).
E Grounding rings screwed to housing,
with fitted gaskets D1
F Flowmeter flanges
FE Functional ground, wire ≥ 4 mm 2 Cu
(10 AWG).
PE Protective conductor required if the
IFS 6000 F is operated with a signal
converter that supplies a field current of
> 125 mA / > 60 V. Wire
≥
4mm 2 Cu
(10 AWG), not included with flowmeter,
to be provided by customer.
R Pipeline
RF Pipe flanges
A Adapter with union nut and O-ring
gasket D1, ready assembled
AP Pipe adapter (tapered connector, union
nuts, hinged clamps, and gaskets D2),
not included with flowmeter, to be
provided by customer
D1 O-ring gaskets, fitted in the adapter
grooves
D2 Gaskets, not included with flowmeter,
to be provided by customer
FE Functional ground, wire
≥
4 mm 2 Cu,
(10 AWG).
PE Protective conductor required if the
IFS 6000 F is operated with a signal
converter that supplies a field current of
> 125 mA / > 60 V. Wire
≥
4mm 2 Cu
(10 AWG), not included with flowmeter,
to be provided by customer.
R Pipeline
R R
RF
E
D2 D1 F RF
E
D1 D2 F
FE
FE
AP D2 A D1 D1 A D2 AP
R R
Flowmeter with adapters
(PE)
(PE)