3 Fig. 3.3 - 11 Removing contactor SZ1 ? Remove auxiliary contact blocks K11, K12 and K14 from contactor SZ1. ? To do this, push the lug (3) on the top of the auxiliary contact block towards the front panel and hold in place. ? Raise the auxiliary contact blocks (1) and remove from the slots. ? Loosen the clamping screws (4) on contactor SZ1. ? Pull the terminal wires out one by one and identify with adhesive labels. ? Use the screwdriver to press down the locking lug (5) on the back of the contactor. ? Tilt the contactor upwards and detach from the top-hat rail. 3.3.7.4 Fitting contactor SZ1 ? Attach the contactor to the top edge of the top-hat rail. ? Push down on the contactor until it snaps into place. ? Check that it is firmly seated. ? Connect up the terminal wires. ? Insert auxiliary contact blocks K11, K12 and K14 from the top and snap into place. ? Switch the placement system on. ? Test the 24 VDC control voltage between terminals A1 and A2. ? Test the supply voltage between terminals L1, L2, L3 and T1, T2 and T3. ? Complete the servicing work as described in 3.3.3 on page 3 - 29. 38 03/2003 Edition Student Guide HS-50 / HS-60 Advanced II 3 Power Supply
3.3.8
3.3.8.1
Replacing contactors SZ2, SZ3 and SZ23 (00341208-01)
Tools and equipment
– Set of slotted-head screwdrivers – Self-adhesive labels – Digital multimeter – HS-50 detailed circuit diagrams
3.3.8.2 Parts Contactor SZ2 SZ3 SZ23 Designation SIRIUS 3RT10/24 VDC, size S0 SIRIUS 3RT10/24 VDC, size S0 SIRIUS 3RT10/24 VDC, size S0 Item number 00341208-01 00341208-01 00341208-01 3.3.8.3 Removing contactors SZ2, SZ3 and SZ23 DANGER Switch off the placement system and disconnect from the power 3 supply (see sections 3.3.1 and 3.3.2). 3 Fig. 3.3 - 12 Removing contactors SZ2, SZ3 and SZ23 Student Guide HS-50 / HS-60 Advanced II 3 Power Supply 03/2003 Edition 39 ? Remove the auxiliary contact blocks
K21, K22, K23, K24 K31, K32, K33, K34 K232, K234 place.
3 from SZ2 3 from SZ3 3 from SZ23 3 3 3
? Push the lug (1) at the top of the auxiliary contact blocks towards the front panel and hold in ? Lift the auxiliary contact blocks (2) and remove from their slots. ? Loosen the contactor clamping screws (3). ? Pull the terminal wires out one by one and identify with adhesive labels. ? Use the screwdriver to press down the locking lug (4) on the back of the contactor. ? Tilt the contactor (5) upwards and detach from the top-hat rail. 3.3.8.4 Fitting contactors SZ2, SZ3 and SZ23 ? Attach the contactor to the top edge of the top-hat rail. ? Push down on the contactor until it snaps into place. ? Connect up the terminal wires. ? Snap the auxiliary contact blocks into place on SZ2, SZ3 and SZ23. ? Switch the placement system on and start it up, then measure the voltages shown in the table in section 3.2.2.2 on page 3 - 12. ? Complete the servicing work as described in 3.3.3 on page 3 - 29. 3.3.9 Replacing auxiliary contact blocks (K1x, K2x, K3x) (00341210-01, 00341221- 01) Tools and equipment – Set of slotted-head screwdrivers – Self-adhesive labels – Digital multimeter 3.3.9.1 – HS-50 detailed circuit diagrams 3.3.9.2 Parts Designation Auxiliary contact block 3RT1/1-pole/1 NC (K11, K12, K24, K34, K234) Auxiliary contact block 3RT1/1-pole/1 NO (K14, K21, K22, K23, K31, K32, K33, K232) Item number 00341210-01 00341221-01 40 03/2003 Edition Student Guide HS-50 / HS-60 Advanced II 3 Power Supply
PLEASE NOTE
The 3RT1/1-pole/1NC auxiliary contact block has a normally closed contact. The terminals are designated 1 NC and 2NC (NC = normally closed contact).
3
3
The 3RT1/1-pole/1NO auxiliary contact block has a normally open contact. The terminals are des- ignated 3NO and 4NO (NO = normally open contact). 3 Position of the auxiliary contact blocks Auxiliary contact block K11, K12 normally closed K14, normally open K24, normally closed K21, K22, K23, normally open K34, normally closed K31, K32, K33, normally open K234, normally closed K232, normally open Contactor SZ1 SZ1 SZ2 SZ2 SZ3 SZ3 SZ23 SZ23 3 3.3.9.3 Removing the auxiliary contact block DANGER Switch off the placement system and disconnect from the power 3 supply (see sections 3.3.1 and 3.3.2). Student Guide HS-50 / HS-60 Advanced II 3 Power Supply 03/2003 Edition 41 3 Fig. 3.3 - 13 Removing the auxiliary contact block ? Loosen the clamping screws (1). ? Pull the terminal wires up or down to remove and identify with adhesive labels. ? Push the grey lug at the top of the auxiliary contact block (2) towards the front panel and hold in place. ? Raise the auxiliary contact block (3) and remove from the slots. 3.3.9.4 Fitting the auxiliary contact block ? Check the type of the new auxiliary contact block (see table in section 3.3.9.2 on page 3 - 40). ? Insert the auxiliary contact block from the top. ? Attach the cable. ? Switch the placement system on and start it up, then measure the voltages at the auxiliary con- tact blocks as per circuit diagram 00336145-XXXXXxLD4. ? Complete the servicing work as described in 3.3.3 on page 3 - 29. 3.3.10 3.3.10.1 Replacing contactor SZ4 (00341209-01) Tools and equipment – Set of slotted-head screwdrivers – Self-adhesive labels – Digital multimeter – HS-50 detailed circuit diagrams 42 03/2003 Edition Student Guide HS-50 / HS-60 Advanced II 3 Power Supply
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