ABB Arc Guard System TVOC-2 Installation And Maintenance Manual page 7

Draft, ne pas diffuser Tue Dec 18 2018 15:16:42 GMT+0100 (Romance Standard Time)
1.3 Electrical Installation of CSU
This chapter describes the electrical installation of the
CSU. For Wiring diagrams and layouts, see chapter
1.7 Diagrams and layouts.
CAUTION
Risk of Electric Shock. Do not remove any current
range bridge connection when current circuits
are live!
WARNING
Safe working methods must be used to prevent
injuries. The safety equipment must not be
disengaged, bypassed or in any other way
modified so that the safety effect ceases.
3. Connect supply voltage
1
Connect the supply voltage to terminal 10...14.
Select the terminals according to desired voltage,
See 1.7.2 Simplified block diagram.
4. Connect the external current transformers
1
Connect the current-circuits from the external
current transformers to terminal 1...6.
Single-, two- or three-phase connection is possible,
but single-phase connection results in a somewhat
longer function time.
5. Connect one side of current-circuit to earth
1
One side of each current-circuit should be
connected to earth.
done by earthing of the terminals 2, 4 and 6 inside
the enclosure.
6. Connect the Current transformers internal
1
The internal connection in the CSU is selected
according to which secondary rating the chosen
transformers have. See table below.
Table 5
Secondary rating of
transformers
1A
2A
5A
ABB
CURRENT SENSING UNIT INSTALL ATION AND MAINTENANCE GUIDE
2
By EMC-reasons this is best
Connection Id
X24-X17, X25-X20, X26-X23
X24-X16, X25-X19, X26-X22
X24-X15, X25-X18, X26-X21
3
4
5
6
1
7
1
1.3-3
1
1.3-4
2
1
1.3-5
1.3-5