8
8
SIF5600 - Manual - 03 - 2008
Main characteristics
- Metal casing for projecting or flash mounting;
- screw terminals;
- connections to cts by means of detachable screw terminals (non short circuiting for the cts);
- 2x16 character backlit LcD displays on versions SIF5600#3D and SIF5600#3F;
- five indicator LeDs on the front of the casing, two of which are dedicated to indicating the cB
position and the rest to showing ON (green), 50-51 (red) as well as showing tripping of the overload
and short-circuit functions, and 50N-51N (red) as well as indicating tripping of the ground fault func-
tions;
- key switch for enabling the breaker command buttons and enabling modification of the settings;
- reSet button for resetting the LeD indicators and output relays;
- breaker open-close buttons (cB OPeN, cB cLOSe);
- two power supply versions:
- auxiliary voltage 110...230 Vac - 110...220 Vdc,
- auxiliary voltage 24...48 Vac - 24...48 Vdc,
- one block input circuit and two output circuits for the logical selectivity (pilot wire accelerated log-
ic), associable with second maximum overcurrent protection (50) and/or maximum residual current
(50N) thresholds; the block input and output circuits are equipped with periodic pilot wire continuity
checking functions and breaker failure and pilot wire short-circuit backup timers.
- two logical inputs, dedicated to sampling the breaker status (52a and 52b);
- four output relays (K1...K4) with one change-over switch, independently programmable for StArt,
trIPPING of each protective function threshold, SeLF-teStING or for controlling breaker opening/
closing. In addition, each output relay may be programmed to be normally energized or de-ener-
gized, and manually or automatically reset;
- isolated rS485 serial interface in the terminal block, operating by means of the MODBUS rtU pro-
tocol, for remote communication;
- isolated front panel rS232 serial interface with 9 pin connector, operating by means of the MOD-
BUS rtU protocol, for local communication. When activated it has priority with respect to the rS485
MODBUS rtU terminal interface;
- measurement of the current fundamental component effective value by means of DFt (Discrete
Fourier transform) with 32 samplings per current period (sampling period of 625
m
s at 50 Hz nominal
frequency or 521
m
s at 60 Hz nominal frequency).
- recording of the last eight events.
A BFO type electro-optical converter module is envisaged whenever transmission of the accelerated
logic signals for any distance by means of multimodal fibre optics is required.
the BFO module is in a casing suited to being mounted on a DIN rail, it has an auxiliary power supply,
and has 2 electrical to optical signal converters and 2 optical to electrical signal converters.
the most significant circuit characteristics are:
- the complete absence of any traditional mechanical calibration devices, since all calibration coef-
ficients are stored in non-volatile memory;
- galvanically isolated input and output circuits (including communication, block and digital input
circuits);
- measurement of input signals by means of sampling and conversion with 32 samplings per period;
- sampling of the state of the digital inputs with each process cycle (1...2 ms);
- optimal input signal filtering by means of the use of combined analogue and digital filters;
- traditional mechanical type output output contacts;
- auxiliary power supply provided by means of a switching circuit, having a particularly wide opera-
tional range and very reduced power dissipation;
- two or three phase current inputs (for functions 50-51) with the following characteristics:
- nominal phase current
I
n
1 A, 5 A selectable by means of jumpers;
- nominal frequency 50 Hz.
- one residual current input (for functions 50N-51N) with the following characteristics:
- nominal current
I
en
1 A, 5 A selectable by means of a jumper;
- nominal frequency 50 Hz.
the most significant operational characteristics are:
- operations to alter the characteristics do not interrupt normal relay operation;
- the impossibility to program unacceptable parameter values, thanks to automatic range parameter
limitation for the corresponding calibration fields
