Omicron CIBANO 500 Getting Started page 18

CIBANO 500 Getting Started
2. Do one of the following:
► Assure that the points of connection carry no voltage. Voltage on the connection points can impact
the safety of the operator but poses no danger to the test set. Clamp CIBANO 500 to the circuit
breaker's trip and close coils without disconnecting other parts of the station. The advantage of
this method is that you do not need to modify the wiring of the circuit breaker to the station. The
disadvantage is that it is difficult to ensure that there is no voltage on the points of connection.
Connecting CIBANO 500 while voltage is present on the connection point requires special safety
precautions depending on the company and national standards and is explicitly not recommended
by OMICRON.
► Disconnect the circuit breaker at the points marked by the red crosses completely from the
substations. Then clamp CIBANO 500 to the circuit breaker's trip and close coils. You can often
do it easily on medium-voltage breakers by removing a single plug and therefore recommended
for maximum safety.
The following figures show typical CIBANO 500 measurement setups for testing medium-voltage and
high-voltage circuit breakers. Depending on the Primary Test Manager settings, many other
configurations are possible.
A1
A2
A3
AN
CIBANO 500
B1
B2
B4
BN
Figure 4-4: Typical measurement setup for the Timing test on medium-voltage circuit breakers with
complete disconnection from the station
18
Trip coil Close coil
–
M
OMICRON