JUMO 709040 TYA-110 thyristor power unit Operating Manual - Manual (Page 17)

Power units 02.06 17
3 Installation
3.1 Important installation notes
Safety
regulations - The choice of cable, installation and electrical connection of the instrument
must meet the requirements of VDE 0100 “Regulations for the Installation of
Power Circuits with nominal voltages below 1000 V AC” or the
corresponding local regulations.
- Electrical installation must only be performed by properly qualified
personnel.
- The unit must be completely disconnected from the supply line (on all
poles) if there is a risk of contact with live parts during work on the unit.
Fusing - In the event of a short-circuit in the load circuit, the power unit is protected
by the built-in semiconductor fuse.
v Section 8.2 “Replacing the semiconductor fuse”
- Do not connect any additional loads to the output load terminals.
Interference
suppression - The electromagnetic compatibility (EMC) meets the standards and
regulations cited in the technical data.
v Section 7 “Technical data”
Wiring Load and control cables should be laid separately, as far as feasible.
The appropriate fuses for control circuitry (e.g. 2A, type Neozed) should be
used to protect the wiring.
Connections
h Check the data given on the nameplate (rated load voltage, load current)
against the data for the system.
h Wire up the connections from supply line – thyristor power unit – load
according to the wiring diagram, and check them
h If the economy circuit configuration is used, check that the rotary electrical
field has clockwise phasing.
h Check the settings for the setpoint inputs
h Check the switch positions
Supply voltage
h Connect the supply voltage for the control electronics as shown in the wi-
ring diagram.
h Link “N/L2” to “V”, unless the economy circuit is being used (slave unit).
Load
connection The electronic switching devices (2 antiparallel thyristors) are in circuit bet-
ween the screw connections “U1” and “U2”.
Phasing The supply voltage for the control electronics and the load voltage must
have the same phase.
h Terminal “L1” must be connected, via a control circuitry fuse, to the same
supply potential as terminal “U1”!
V