Installation Of Voltage Transformers Type 4Mt7 At The Cable Feeder - Siemens 8DA10 Series Installation And Operating Instructions Manual

861-9601.9 • INSTALLATION AND OPERATING INSTRUCTIONS • 8DA10 • Revision 11
Disruptive discharges due to air inclusions
Will damage the cast-resin bushing.
➭ While installing the voltage transformer, let excess air out of the plug-in connection with a
cable strap.
➭ Verify intact condition of the cable strap. If the cable strap was damaged when it was
pulled out, remove the voltage transformer and eliminate the residues of the cable strap.
➭ To let excess air out of the plug connection while mounting the voltage transformer, fit a
nylon thread or a cable strap into the inside cone of the voltage transformer mounting plate.
➭ Insert the primary terminal of the voltage transformer slowly into the inside cone of the
mounting plate, pulling the cable strap out at the same time.
➭ Connect the low-voltage plug connector to the voltage transformer.
➭ Fasten the voltage transformer at the panel. To do this, bolt the voltage transformer
uniformly together with the voltage transformer mounting plate using four M8 bolts.
Tightening torque: 30 Nm.
Fig. 130: Fastening the voltage transformer
24.3

Installation of voltage transformers type 4MT7 at the cable feeder

Fig. 131: 4MT7 voltage transformer
➭ Isolate and earth the cable feeder.
➭ Verify safe isolation from supply.
CAUTION
① Panel connection housing
② Inside-cone bushing for primary
terminal of transformer
③ Primary terminal at the voltage
transformer
④ Silicone adapter
⑤ Fixing bracket (fastened to the
voltage transformer housing)
⑥ 4MT7 voltage transformer
⑦
Low-voltage plug connector
⑧ Inside-cone bushing for cable
⑨
Panel connection cover
Installation
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