CIRCUTOR EMK Series - Manual (Page 16)

EMK series
Instructions Manual M98118701-01-12A 16
Table 7-2.- Tightening torques of the cables to the fuse bases
THYRISTOR TYPE Tightening of power cables
Semikron 3.5 Nm
IXYS 3.25 Nm
7.2.4 Key points for inspecting capacitors.
•
Inspect the cables and terminals. They should not be overheated or blackened.
•
The terminals must be clean
•
The slow discharge resistors must be in good condition (they should not be open or show
signs of burns)
•
Check the tightness of capacitor terminals, as shown in Table 7-3
Table 7-3.- Tightening torques of the cables on the capacitor bank terminals
Capacitor Power terminal
(Nm)
Earth terminal
(Nm)
CFB, CSB 21 6.2
7.2.5 Key points for inspecting the regulator
•
Check that the regulator does not show signs of deterioration and the display lits normal
•
Inspect the cables and terminals. They should be clean and should not be hardened or
overheated
•
Check the connections and the insertion of removable terminal strips, if used:
- The terminal strips must be well fastened on pluggable regulators
- Check that the terminals are tightened properly. The recommended torque is 0.6 Nm
7.2.8 Cleaning the cabinet.
•
Remove any solid particles
•
Clean the inside of the cabinet
•
Clean ventilation grilles
7.3 Maintenance with the capacitor bank connected.
•
Check that the main switch turns on and off, without having to force the mechanism
•
If there is individual earth leakage protection for the capacitor bank, check its proper operation
by pressing the test button
•
Check that the auxiliary control voltage is within the tolerance limits. If the capacitor bank has
an autotransformer, check that it is in good condition and does not show signs of deterioration
•
Force the connection and disconnection of the capacitors in manual mode. (refer to the
regulator manual before carrying out this operation) and perform the following checks:
- Check that the steps connect and disconnect properly
- Check that there is no consumption in any phase with the step disconnected. If there is
consumption this means that some of the thyristors are defective.
- Check the consumption of the different steps, in each phase. The normal values are
shown in , in accordance with the power of each step , in accordance with the power of
each step in Table 7-4.