Tettex MIDAS micro 2883 - Summary

Safety
7
After the MIDAS micro 2883 is properly grounded, the remaining test leads and the High Voltage Test Cable are
plugged into their receptacles. Do not connect test leads to the equipment terminals until after the leads are
connected to the MIDAS micro 2883.
The safety observer should supervise the proper procedures for connecting the MIDAS micro 2883 leads to the
device under test at all times.
The MIDAS operates from a single-phase power source. It has a three wire power cord and requires a two-pole,
three terminal, live, neutral and ground type connector. Do not bypass the grounding connection. Any interruption
of the grounding connection can create electric shock hazard. The power input connection should be the last step
in setting up the instrument.
After the tests are completed, all test leads should be disconnected first from the
device under test and earthed before they are disconnected from the instrument.
The green / yellow safety ground cable should be the LAST lead to be disconnected
from the set.
Do not disconnect the voltage cables from the front panel of the Midas micro unless
the MIDAS micro 2883 Voltage is set to HV OFF, and the Safety Switch is released.
Attempts to disconnect leads while the MIDAS micro 2883 is energized may result
in a serious and possibly lethal electrical shock.
4.5 Summary
Note: Many accidents that happen around high voltage equipment involve personnel who are familiar, and perhaps
too familiar, with high voltage equipment. Staying alert and ever watchful requires constant training and awareness
of the inherent hazards. The greatest hazard is the possibility of getting on a live circuit. To avoid this requires
constant vigilance - for oneself and for one's fellow workers.
In addition to the obvious dangers, personnel should be alert to recognize subtle dangers as well. For example,
during transformer excitation-current tests, the floating terminals may have significant voltages induced in them by
simple transformer action. Therefore, all terminals of a device under test, unless grounded, should be considered
to be live while the test is in progress.
When potential transformers or any transformers are interconnected, voltage can be back-fed through the
secondary windings to produce high voltage on the primary although the primary is seemingly isolated from the
power system. This entail a second important rule - all terminals of a device under test should be completely
isolated.
Finally it should be noted that the MIDAS micro 2883 is relatively lightweight. It can be lifted by a single person. We
recommend however that you lift it carefully and ergonomically in order to prevent injuries.
Make sure not to trap any fingers or cables when closing the Midas micro lid. The sharp edges might injure you or
damage the insulation.
Remember: Safety, FIRST, LAST, ALWAYS!