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SIA-E Self-Powered relay
50P, 50N, 51P and 51N protection functions
- Self-powerred overcurrent protection relay starts up from 5 A of primary single phase
- Reduces the operating cost of the centre: Installations and maintenance of batteries
- Can be temporarily supplied by an external battery
- Events can be recorded (optional) and specific test menu is provided depending on the model
- High electromagnetic compatibility
- Reduced depth of 80 mm makes it easy to install
- Contact-braker protection function by means of trip blocking
- External trip, activation of the trip or the coil
- Indicates the cause of the trip even though the relay loses the supply (bistable magnetic indicators)
- LCD screen allows the parameters to be set and monitored
- Uses a specific Fanox current transformer with dual-core.
- RS 232 serial port on the front and real RS 485 port on connection terminals. The ModBus RTU protocol is implemented for both ports
Functions diagram
Connections diagram
Technical param.
Dimensions
Communications
- The relays have an RS-232 serial port on the front of the equipment with a DB9 connector and an optional rear RS-485 port on connection terminals. The Modbus RTU protocol is implemented for both ports.
- The SICom programme with WindowsÆ 2000/XP uses a graphic user interface to allow you to access all equipment information, modify the settings and save events.
The programme can be used locally by using the front port or remotely by using the rear RS485 port.
- There are 4 levels of access with user-definable codes.

Accessories
BATTERY POWER SUPPLY KITCOM
- Adaptor that lets you connect two batteries AAA type of 1,5V to the SIA relays using the front RS232 communications port.
- The adaptor allows the use of a 12V battery power supply and communication through the port at the same time.
- Ensures full operability of the SIA, even when tripping in case of a fault.
CT-DB DUAL-CORE TRANSFORMER
- Current transformer for indoor service - no primary coil.
- With two secondary coils, one for protection and the other for self-powering (3 days in case of a fault).
- For use with the SIA-E protection relay
- Highest voltage/Insulation rating: 0.72 kV/3kV
- Insulation class: Class B, 130º C
- Short-circuit therminal intensity/Dynamic: 20kA - 1s/50kA
- Plastic case with resin filling:self-exinguishing, halogen-free UL94-VO
- Standard: IEC 60044-1
STRIKER PRT
- This is a single effect solenoid. The striker is spring operated.

- The striker is activated is activated by low-power polarised electrical signal supplied by the relay in case of a fault.
- The striker is reset to its starting position manually.
- Travel: 8 mm
Spring strength:
Start of travel: 37 N
End of travel: 18 N
Response time: 4 ms
Protection rating: IP-40
TRIP ADAPTOR TCM
- This item is conn
ected to the relay trip outlet and supplies the energy needed to trip the coil.
- It is loaded using the auxiliary 230 Vac voltage of the transformation centre and retains power for up to 3 days without external power supply.
Model list
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