TAVRIDA ELECTRIC ISM Shell_2 Series, Applications Manual

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Operating test
Disconnect the breaker from the high voltage source before functional testing.
· Turn on the CM auxiliary power supply and check the following operating indications:
- The POWER LED must light up immediately.
- The READY LED must blink during charging of capacitors and light up continuously within 15 s
after switching on. The READY relay contact (X2:1,2) must close within 15 s.
- The READY relay contact (X2:1,2) must close within 15 s.
- The MALFUNCTION LED must not light up.
· Check of all basic and extended functions (if any) according to the chapters “Switching and Control Functions” and
“Signalling”.
· During operation both CM-actuator voltage (on CM X2:9,10 and ISM XT2:13,14) and internal auxiliary
voltage for ISM auxiliary switch S13 (on CM X2:7,8 and ISM XT2:15,16) amounts to approximately 230 V DC.
· After switching off the CM, there is still a voltage at the terminals of the capacitors. Only after the
MALFUNCTION LED is extinguished the voltage has dropped to a safe value.
In the factory the magnetic actuator coils are connected and tested according to the existing circuit diagram.
If the actuator coil is connected with reversed polarity it is possible that the first operations cannot be performed
successfully. This is no failure of the ISM and after a few switching operations this possible effect disappears
permanently (unless the polarity is changed again).
After above listed functionality tests are performed succesfully the ISM can be tested under high voltage and with
load connected.
Maintenance
Under normal operating conditions (see chapter “Regulations and ambient conditions, Ambient conditions”, page
73) the ISM is maintenance free for a period of at least 25 years or until it has reached the permissible number of
operating cycles. Nevertheless the surface of the ISM must be kept clean. Deposits of any kind must be removed.
Non-Conformity
If during installation, commissioning, operation or maintenance any non-conformity occurs, action shall be taken
in accordance with the non-conformity report on page 78.
Caution
Danger!
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