cpu module 3BSE018151R1


External connections:
• Excitation current to the load cells
• 2 or 4 analog inputs for load cell signals
• 4 analog outputs, voltage or current
• 8 digital inputs for control signals
• 8 digital outputs
• +24 V supply for external units, max 0.5 A
• Ethernet connection
• Service and multiple control units
• 2 serial interfaces of type RS-232 for
external displays, control, etc.


Category: SKU: 3BSE018151R1 Tag:
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cpu module 3BSE018151R1

cpu module 3BSE018151R1


Application All trip signals from the different protection functions shall be routed through the trip logic. In its simplest alternative the logic will only link the TRIP signal and make sure that it is long enough.

Tripping logic SMPPTRC offers three different operating modes:

• Three-phase tripping for all fault types (3ph operating mode)

• Single-phase tripping for single-phase faults and three-phase tripping for multiphase and evolving faults (1ph/3ph operating mode). The logic also issues a three-phase tripping command when phase selection within the operating protection functions is not possible, or when external conditions request threephase tripping.

• Two-phase tripping for two-phase faults. The three-phase trip for all faults offers a simple solution and is often sufficient in well meshed transmission systems and in sub-transmission systems.

Since most faults, especially at the highest voltage levels, are single phase-to-earth faults, single-phase tripping can be of great value. If only the faulty phase is tripped, power can still be transferred on the line during the dead time that arises before reclosing. Single-phase tripping during single-phase faults must be combined with single pole reclosing. To meet the different double, 1½ breaker and other multiple circuit breaker arrangements, two identical SMPPTRC function blocks may be provided within the IED.


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