Shihlin Inverter Introduction
3.6 Mini Jumper Instruction
Main power isolated from earth:
1. If the inverter is supplied with a non-grounded power supply (IT power), the Mini
Jumper must be cut off to prevent circuit damage (according to IEC61800-3) and
reduce earth leakage current.
2. Do not cut off the Mini Jumper if the input filter is active. This will increase earth
leakage current.
3. Cut off the Mini Jumper if the earth leakage current is overlarge. This will decrease
the filtering effect.
The Mini Jumper is shown as follows:
Figure 1: frame AA Figure 2: frame D/E/F
======Caution:===================================================================
1. Do not cut off the Mini jumper after applying power to the inverter. Please make sure that the main
power has been switched off before cutting of the Mini Jumper.
2. Electric conductivity of the capacitor will be cut off by cutting off the Mini Jumper. Moreover, the
electromagnetic capacitance of the inverter will be reduced by cutting of the Mini Jumper.
3. Do not switch off the Mini Jumper when the main power is a grounded power system. To prevent
machine damage, the Mini Jumper shall be cut off if the inverter is installed on an ungrounded power
system, a high resistance-grounded (over 30 ohms) power system, or a corner grounded TN system.
4. Mini jumper cannot be cut off when performing the Hi-pot tests.
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