KROHNE IFC 020 Short EN - Manual (Page 2)

Condensed instructions IFC 020 1/1
Part A System installation and start-up
1 Electrical connection: power supply
1.1 Important installation notes PLEASE NOTE !
1.1.1 Location
•
Electrical connection in accordance with VDE 0100 ”Regulations governing heavy-current
installations with line voltages up to 1000 V” or equivalent national regulations.
• Do not cross or loop cables inside the terminal compartment.
• Use separate cable entries (see below) for power supply, field current cables, signal lines,
outputs and inputs.
• Protect flowmeters or switchgear cabinets with built-in devices from direct sunlight.
Fit a sunshade if necessary.
• When installed in switchgear cabinets, signal converters must be adequately cooled,
e.g. use fans or heat exchangers.
• Do not expose signal converters to intense vibration.
1.1.2 Only for separate systems/signal converters (F- and E versions)
•
Keep distance between primary head and signal converter as short as possible.
Refer to Sect. 1.3.4 for maximum permissible length of signal and field current cables.
• Use the supplied Krohne signal cable A (Type DS), standard length 10 m (33 ft).
• Always calibrate primary head and signal converter together. Therefore, when installing,
ensure primary constant GKL is identical; refer to instrument nameplate for the primary
head. If the GKL is not identical, set the signal converter to the GKL of the primary head.
Refer also to Sections 4.
• Dimensions of signal converter; refer to Section 10.4.
1.1.3 Cable entries (K- and F- versions)
Number of cable entries: 2 for the compact flowmeters
4 for the seperate IFC 020 F signal converter
NOTE: Ensure gaskets are fitted correctly and maintain
the following max. torques!
1 Max. torques for PG 13.5,
1/2“ NPT or 1/2“ PF adapters: 4 Nm / 2.8 ft
x
lbf
2 Max. torques for PG 13.5 only: 3 Nm / 2.1 ft
x
lbf
3 Gasket
A) PG 13.5 cable entries
These cable entries may only be used for flexible electrical cables if the relevant electrical
regulations so allow, e.g. National Electric Code (NEC).
Do not fix rigid metal conduits (IMC) or flexible plastic conduits to the PG 13.5 cable entries, refer
to “Point B, C” below (1/2” NPT or PF adapters).
B) 1/2“ NPT adapters C) 1/2“ PF adapters
For most North American systems the regulations require that electrical conductors be laid in
conduits, particularly where power voltages > 100 V AC are concerned.
In such cases, use the 1/2” NPT or 1/2” PF adapters to which flexible plastic conduits can be
screwed. Do not use rigid metal conduits (IMC)!
Lay conduits such that no moisture can penetrate into the converter housing.
Should there be risk of any condensation water forming, fill the cross-section of the conduit
around the cables at these adapters with a suitable sealing compound.
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