Siemens 3VA1 100 A, Руководство пользователя

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Accessories
4.10 EFB300 external function box
3VA molded case circuit breakers
380
Manual, 04/2015, A5E03603177010-02
4.10.2 Power supply
The EFB300 external function box is supplied with 24 V DC and acts as a power supply for
the connected ETU. This allows the ETU to remain operational even when a 3VA molded
case circuit breaker has tripped.
4.10.3 Functions of the digital input and digital outputs
Functions of the digital input
Active alarms transmitted by the ETU can be acknowledged via the digital input.
Functions of the digital outputs
With the powerconfig software application, it is possible to selectively assign signals
transmitted by the connected ETU to the four digital outputs of the EFB300. powerconfig can
be accessed via the TD500 test device or by means of the COM800 or COM100 breaker
data server through the interface to the communication system.
The following signals (dependent on the ETU) can be assigned:
● All reasons for ETU tripping (L, S, I, N and G) plus
Phase loss
Underload
Blocking
● Overload alarms AL 1 and AL 2
● Pre-trip alarm for overload protection
An alarm is output in advance of a trip event, allowing time for a load to be shut down
before a maximum output or current limit is exceeded.
● Load shedding/load pick up
By means of the load shedding and load pick up signals, a load can be switched off or
connected automatically depending on the capacity utilization of the 3VA molded case
circuit breaker.
● RCD trip
● Energy pulse (with ETU 8-series only)
An energy pulse (S0 signal pulse) contains information pertaining to the consumption of a
specific quantity of energy. The data are transmitted by weighted pulses, i.e. a specific
number of pulses are transferred to represent one kWh unit.
Settings for the energy pulse, see table on next page.
Example of energy pulse:
Energy meter source: Active energy kWh
Pulses per unit: 5
Unit: 20 kWh
Pulse length: 30 ms
Output of 140 kWh: Output of 35 pulses, each 30 ms in length