HS50 HS60 维修手册2(8)

3.3.13

3.3.13.1

Replacing the combined contactor/protective device (SSK) (00341222-01)

Tools and equipment

– Set of slotted-head screwdrivers – Self-adhesive labels – Digital multimeter – HS-50 detailed circuit diagrams

3.3.13.2 Parts 3TK2805/24 VDC/5S-1NC combined contactor/protective device, item number 00341222-01 3 3.3.13.3 Removing the combined contactor/protective device DANGER Switch off the placement system and disconnect from the power 3 supply (see sections 3.3.1 and 3.3.2). Fig. 3.3 - 18 Removing the combined contactor/protective device 48 03/2003 Edition Student Guide HS-50 / HS-60 Advanced II 3 Power Supply ? Loosen the clamping screws (1). Pull the terminal wires out one by one and identify with adhe- sive labels.

? Use the screwdriver to press down on the locking lug (2) on the back of the combined contac- tor/protective device (3).

? Tilt the combined contactor/protective device upwards slightly and remove.

3

3.3.13.4 Fitting the combined contactor/protective device ? Place the combined contactor/protective device on the top-hat rail and snap into place. ? Connect up the terminal wires. ? Switch the placement system on and start it up. ? Use the digital voltmeter to measure the voltages at the terminals as per circuit diagram 00336145-XXXXXX-LD4. ? Complete the servicing work as described in 3.3.3 on page 3 - 29. 3 3.3.14 3.3.14.1 Replacing transformer T1 (00345634-01) Tools and equipment – Set of slotted-head screwdrivers – Open-ended spanner, size 13 – DIN 911 Allen key, size 6 – Self-adhesive labels – Fork-lift truck – Tripod with block and tackle for lifting the transformer – Digital multimeter – HS-50 detailed circuit diagrams 3.3.14.2 Parts 11.1 kVA transformer, item number 00345634-01 3 3.3.14.3 Removing transformer T1 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 49 3 Fig. 3.3 - 19 Fixing bar for the power supply unit WARNING The power supply unit is very heavy (the transformer alone weighs 70 kg) so two people will be needed to remove it. 3 3 ? Lift the power supply unit until it is half-way out. ? Loosen the M8 hexagon socket-head screw (1) and remove the fixing bar (2). ? Push the forks of the fork-lift truck beneath the power supply unit. ? Raise the forks until the power supply unit is resting on them. ? Push the power supply unit until the entire weight is resting on the forks. To do this, one person should hold the truck in position while the other person pushes the power supply unit onto the forks. CAUTION Ensure that the cables do not become trapped otherwise the insulation will be damaged. 3 ? Detach the terminal wires from the primary terminal strip (item 1 in Fig. 3.3 - 20) one by one and identify with adhesive labels. ? Detach the terminal wires from the secondary terminal strip (item 2 in Fig. 3.3 - 21) one by one and identify with adhesive labels. 50 03/2003 Edition Student Guide HS-50 / HS-60 Advanced II 3 Power Supply

? Loosen the M8 hexagon nuts (item 3 in the Fig. 3.3 - 20 and 3.3 - 21).

? Remove the four plain washers (4) and four rubber washers (5) (see Figs. 3.3 - 20 and 3.3 -

21).

? Lift the transformer out of the unit.

WARNING The transformer is very heavy so it should either be lifted by two 3 people or by one person using a tripod with block and tackle. 3 Fig. 3.3 - 20 Detaching the terminal wires from the primary terminal strip Student Guide HS-50 / HS-60 Advanced II 3 Power Supply 03/2003 Edition 51 3 Fig. 3.3 - 21 Detaching the terminal wires from the secondary terminal strip 3.3.14.4 Fitting the transformer T1 ? Check that there are four rubber washers and four plain washers on the screw bolts on the bot- tom of the unit. ? Place the transformer in the power supply unit. ? Place the four rubber washers (5) on the screw bolts. PLEASE NOTE: These rubber washers are important because they absorb noise and vibration. 3 ? Attach the four plain washers (4). ? Use the four M8 hexagon nuts to fix the transformer T1 in place. ? Connect the terminal wires to the primary and secondary terminals. ? Switch the placement system on and use the digital voltmeter to measure the voltages on the primary and secondary sides of the transformer (see Fig. 3.2 - 4 and 3.2 - 5 on page 3 - 18. 3 DANGER Switch off the placement system and disconnect from the power 3 supply (see sections 3.3.1 and 3.3.2). ? Push the power supply unit so that it is half-way in the placement system. 03/2003 Edition Student Guide HS-50 / HS-60 Advanced II 3 Power Supply 52

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