Manual Energy Storage Inverter ESI-S
Safety instructions 9
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2 Safety Instructions
These safety instructions are intended for all work on the ESI-S. Neglecting these
instructions can cause physical injury and death. All electrical installation and
maintenance work on the ESI-S should be carried out by qualified electricians. Do not
attempt to work on a powered ESI-S.
After switching off the supply to the ESI-S, always wait for at least 25 minutes before
working on the unit in order to allow the discharge of DC capacitors through the
discharge resistors. Always verify by measurement that the capacitors have discharged.
DC capacitors may be charged to more than 800 Vdc.
Before manipulating current transformers, make sure that the secondary is short-
circuited. Never open the secondary of a loaded current transformer.
You must always wear isolating gloves and eye-protection when working on electrical
installations. Also make sure that all local safety regulations are fulfilled.
DANGER: To ensure safe access, supplies to each individual enclosure must be isolated
before opening.
WARNING: This equipment contains capacitors that are connected between phase and
earth. A leakage current will flow during normal operation. Therefore, a good earth
connection is essential and must be properly connected before applying power to the
inverter.
WARNING: There are AC capacitors & DC capacitors connected inside this inverter.
Before performing any maintenance work, please short and ground the three line
terminals. The DC capacitor needs 25 mins to discharge after disconnection. Please
wait for this duration before touching any live parts, even after discharging the AC
capacitors, to avoid electrical shock. Never discharge DC capacitors through short
circuit. Always use a current limiting resistor of minimum 100
Ω
.
WARNING: To avoid electrical shock due to residual voltage on the capacitors, the left
side cover of the inverter should not be removed once the system is commissioned.
