AEG ARE I2 Operations Instructions Page 50

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48
tions, limiting and the influence of operating modes with SSSD and MOSI) give the actual value
signals dynamic rations which can be smoothed with a smoothing stage. The MEAN (VALUE) para-
meter is applied here. The following setting is recommended: MEAN(VALUE) = 25.
4.11 CURRENT TRANSFORMER
By standard, each power section of the power controller has a current transformer. When using
external current transformers, for instance on the secondary side of a transformer, these must be
connected to the terminals X7.1 and X7.2 and terminated using a load resistor.
Each external voltage transformer must be connected with an load resistor.
CAUTION
Danger of electric shocks.
Current transformers must not be used without load resistors (secondary side), otherwise high
voltages can occur at the terminals.
ATTENTION
Danger of damaging Thyro-P.
Current transformers must not be used without load resistors (secondary side), otherwise high
voltages can occur at the terminals.
The load resistor must be designed so that at nominal current a voltage drop of 0.9 - 1.1Vrms
occurs at the burden resistance.
The value of the used load resistor has to be entered with Thyro-Tool Family or LBA-2 in parameter
U_Load resistor.
REMARK
The internal current transformers of Thyro-P, which are not needed when using external current
current transformers, are jumpered by load resistor R40 on the control boards.
If load current monitoring of the phase 2 (not controlled) is desired for Thyro-P 2P,
then an external current transformer and an external voltage transformer must be provided for
this purpose.
CURRENT TRANSFORMER TERMINAL X7.2 TERMINAL X7.1
phase L1 .11(k) .12(l)
phase L2 .21(k) .22(l)
phase L3 .31(k) .32(l)
TAB. 11 CURRENT TRANSFORMER
The following parameters must be checked or adjusted:
HARDWARE-PARAMETER
Current transformer ratio ü:1,
e.g. at 100A/5A transformer is ü=20 UE_I
Type current in A
(Primary current of transformer, e.g. 100A) I_TYP
U_load resistor in V U_load resistor
(Voltage at load resistor)
LIMITATIONS
Ieff max xxxx A IEMA
This is conform to voltage at load resistor at nominal current of transformer.
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