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APC-TF Series MAINTENANCE

Thyristor protection

The thyristors in the APC-TF series controllers are protected in the following way:

· external high speed fuses against over-currents (except for short-wave infrared applications)

· RC snubbers and MOVs (varistors) protect against over-fast voltage variations and transient

over-voltages when the thyristors are not conducting.

*** MOVs (varistors) install : Optional

Nominal current

MODEL

Dimensions

H, L, W (mm)

Compatible Maker

Controller Fuse

30A 32A JR-61

40A 55A JR-61

55A 63A JR-61

70A 80A JR-61

90A 100A JR-61

110A 125A 660GH-125

130A 160A 660GH-160

160A 200A 660GH-160

200A 250A 660GH-200

250A 250A NH00-315

300A 300A NH00-350

400A 400A A50P400

500A 500A A50P500

* Recommended high-speed fuses for thyristor protection

DANGER!

High-speed fuses are used only for the protection of thyristors against large amplitude

overloads.

Under no circumstances should these high-speed fuses be used to protect the installation.

Attention!

For the use of high-speed fuses in short-wave infrared applications,

Please contact

CSM

Controls.

To protect the thyristors in the APC-TF series, 3 fuses and bus-bar must be used.

Details of these are given in the following table.

Maximum operating voltage for fuses: 500V to 660V (line-to-line).

EST APC-TF Series User Manual

Questions and Answers: