Current Sensor; Brake Igbt Module (Optional) - Danfoss VLT HVAC Drive FC100 Service Manual

Disassembly/Assembly - Inve...

8.2.8 Current Sensor

NOTE: There are two types of current sensors, 500 A or
1000 A, depending on the size of the unit. Removal for
both are the same except for an additional final step for
the 1000 A sensor.
1. Remove lower capacitor bank assembly in
accordance with procedure.
2. Remove six screws (T30) connecting the bus bar
to the IGBT module at IGBT end of bus bar.
3. Remove three screws (7mm) on standoffs from
IGBT end of bus bar.
4. Remove one screw (T40) from opposite end of
bus bar attached to output bus bar.
5. Unplug wire from current sensor (not shown).
6. Remove two screws (7 mm) attaching base of
current sensor to back panel.
8 8 7. Remove bus bar and slide current sensor free
from bus bar.
8. For 1000A units, remove mounting bracket from
back of current sensor by removing four screws
(8mm). NOTE: Retain mounting bracket and
screws for reassembly of replacement part.
Reassembly is done in reverse order.
NOTE
The six screws (T30) connecting the bus bar to the IGBT
module should be tightened to 4 Nm (35 in lbs).
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1 Current sensor
2 T30 screw (step 2)
3 7mm screw (step 3)
4 T40 screw (step 4)
5 Mounting bracket (1000A sensor) (step 8)
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High Power Service Manual for Modular F Frame Drives
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MG90K202 - VLT is a registered Danfoss trademark

8.2.9 Brake IGBT Module (Optional)

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1 Attaching nut (step 4)
2 Left attached bus bar (step 4)
3 Jumper bus bar between brakes (step 5)
4 Attaching nut (step 5)
5 IGBT-Ind bus bar assembly (step 6)
6 Brake IGBT cable (step 3)
7 Brake IGBT module
8 IGBT-Ind bus bar assembly (steps 9 and 10)
9 Snubber capacitor (step 7)
10 IGBT capacitor bus bar (step 8)
NOTE: The brake IGBT is an option and may not be present
on all units.
1. Remove both upper and lower capacitor bank
assemblies in accordance with instructions.
2. Remove high frequency board in accordance with
instructions.
3. Unplug brake IGBT cable from connector on each
of the two brake IGBT modules.
4. Remove bus bar attached to left side of panel
and to left most brake IGBT by removing two
nuts at each end of bus bar.
5. Remove jumper bus bar between two brake
IGBTs by removing retaining nut on each end of
jumper bus bar.
6. Remove the two screws (T30) connecting the
IGBT-Ind bus bar assembly to each brake IGBT
module.
7. Remove nine snubber capacitors by removing
two screws (T30) from each capacitor.
8. Remove the three IGBT bus bars freed by
removing screws in step 7.
9. Remove four retaining nuts (13mm) connecting
IGBT-Ind base bar assembly to two DC bus bars
from inductor.
10. Remove IGBT-Ind bus bar assembly.
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