•
A user-defined signal is created in the Information routing matrix of the device (see the section
Processing Signals in DIGSI 5 Online Help). Then the signal is routed to the binary input (for example,
BI1) as L (active without voltage) and to a binary output BO5.
•
During normal faultless operation, the status is as follows:
– BO1 and the life contact are open.
– BI1 is dead and the corresponding BO5 is closed.
The undervoltage-tripping element of the circuit breaker initiates tripping of the circuit breaker in the
following cases:
•
A trip command issued by the protection device
•
An internal device fault
•
A fault in the trip circuit
•
A failure of the control voltage
Related to the preceding cases, the following information must be noticed:
•
If the device is in fault, the trip circuit in Figure 6-1 is applied to meet all ATEX-related requirements. The
normal trip circuit of the circuit breaker and this trip circuit work separately.
•
To avoid automatic shutdown of the motor for operational reasons in a device fault, the following
options are available:
– Redundant protection device
– Redundant protection functions or backup protection functions:
– Backup short-circuit protection
Via the corresponding design of the power-system protection, possibly including circuit-breaker
failure protection.
– Redundant t
E
-time supervision
Through the additional overcurrent protection, additional speed monitoring, or motor restart
inhibit in case of a device failure, in connection with the locked-rotor protection within the
protection system of the machine.
– Redundant thermal overload protection
Through the monitoring of the stator-winding temperature.
•
The trip circuit for the circuit breaker must be fused by a maximum of 6 A, tripping characteristic C
(EN 60898).
•
Hardware modifications are not necessary, provided the ordered model variant satisfies exactly the
system requirements (rated current, power-supply rating, and communication). Considering the high
safety requirements of the application area, omit hardware modifications generally.
•
An exchange of the fuse in the power-supply unit of the device must be treated as a repair action and as
such can only be performed in the factory of the manufacturer.
Information on Installation, Connection, and Operation
34 SIPROTEC 5, Additional Information on the Protection of Explosion-Proof Motors with Type of Protection Increased Safety e,
Manual
C53000-H5050-C078-1, Edition 03.2019
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