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6.1.3 Test Cables
The test cables bypass the main DC bus capacitors and supply DC voltage to the power card from
the soft charge card. This provides voltage for testing the power card without the adjustable
frequency drive circuitry being powered. The SCR shorting plug ensures that the SCRs do not fire.
There are two cable types, the D frame adjustable frequency drives use the 2-pin cable and the
E frame adjustable frequency drives use the 3-pin cable (see the figures below). The D frame
cable connects to the wire harness above the power card by the SMPS fuse to the power card
connector MK105. The E frame connects between the soft charge connector MK3 and the power
card connector MK105.
130BX64.10
Figure 6.2: SCR Shorting Plug
WHITE
BLACK
PIN 1
PIN 2
Figure 6.3: Two-Pin D frame test cable
PIN 1
PIN 1
PIN 2
PIN 3
PIN 2
Figure 6.4: Three-Pin E Frame Test Cable
High Power Service Manual for VLT
®
FC Series
Adjustable Frequency Drives
6 Test Procedures
MG.90.L1.22 - VLT
®
is a registered Danfoss trademark
6-3
6
Содержание VLT HVAC FC 100
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