DV Power RMO10T, Руководство пользователя

Страница: 4 / 33

4
RMO10T Designated Use, Functionality
Safe Operation Procedures
• Hazardous voltages of up to 400V can occur inside RMO10T. Therefore, it is not permitted to open
RMO10T.
• Do not insert objects (e.g., screwdrivers, etc.) into the ventilation slots.
• Before putting RMO10T into operation, check the test set for any visible damage.
• Do not operate RMO10T under wet or moist conditions (condensation).
• Do not operate RMO10T when explosive gas or vapors are present.
• The serial interface of RMO10T should only have external devices connected that meet the
requirements for SELV equipment according to EN 60950 or IEC 60950.
• When setting up RMO10T, make sure that the air slots of the test set remain unobstructed.
• If RMO10T is opened by the customer, all guarantees are invalidated.
• If RMO10T seems to be functioning improperly, please contact the IBEKO POWER AB (refer to
section ”Manufacturer Contact Information”) after first checking the section Error Messages.
• Do not use RMO10T without the extra protective ground cables for RMO10T and winding connection.
Always establish this connection as the first one before you do any other connections, and separate
this connection as the very last one.
• Never open the measuring circuit while current flows as dangerous high voltage may occur. This is
indicated by the red discharge LED and the beeper.
Power Supply
• Supply RMO10T only from a power outlet that is equipped with protective ground.
• Instead of supplying RMO10T from phase – neutral (L1-N, A-N), it may also be supplied from phase
to phase (e.g., L1-L2; A-B). However, the voltage must not exceed 240 V AC, please refer to the
section Technical Data.
3 Designated Use
The Winding Ohmmeter RMO10T is designed for measuring resistances of inductive test objects used in
the electric power industry or similar industries. It is employed for resistance measurement during
manufacturing, commissioning and testing of:
ƒ transformers,
ƒ on-load tap changers,
ƒ generators and electrical motors,
ƒ high current busbar joints,
ƒ cable splices.
Any other use of the RMO10T than the ones mentioned above is to be considered improper and will not
only invalidate all customer warranty claims but also exempt the manufacturer from its liability for repair
or exchange.
4 Functionality
4.1 Current Test
The RMO10T generates a filtered (true) DC current.
RMO10T test set can measure the winding resistance of any transformer; small or very large, single or
three phase, star, delta or zig-zag connected. There are two independent measuring channels which can
be used to simultaneously measure resistance of up to two windings at the same time.
Choose the test current so that the maximum value is obtained for the expected resistance
(refer
to section 6.1).