SIA-B Dual & Self-powered Relay OC&EF Protection Relays

SIA-B Dual & Self-powered Relay OC&EF Protection Relays

SIA-B Standard CT’s

  • The SIA-B is an overcurrent protection relay with self powered and dual powered (Self-powering + Auxiliary power) options.
  • The relay is self powered using the operating current through three /1 (<2VA) standard current transformers fitted on the lines. These transformers are also used to obtain current measurements. Besides, SIA-B relay can be used with auxiliary power supply (24-230 Vac/dc). The relay can be also supplied by a USB cable connected to the laptop, with the USB KITCOM adapter or an standard power bank.
  • Internal commissioning battery included.
  • 50_1, 50/51, 50G_1, 50/51G, 49, SHB, PGC protection functions.
  • Micro USB front port connection (Modbus RTU protocol) for local communication. Remote communication through rear RS485 port (Modbus RTU or DNP 3.0 selectable by general setting) as optional.
  • 49T function available through configurable inputs.
  • 52 function to control the state of the circuit breaker.
  • 50_2, 50G_2, CLP, 46, 50BF and trip block for switch disconnector as optional.
  • Specific test menu is provided.
  • High electromagnetic compatibility.
  • The installation and subsequent maintenance of external batteries is eliminated. The operating costs of the centre are reduced.
  • Really low start-up levels: 75 mA in three phase system /160 mA in single phase system.
  • The line opening mechanism is activated by means of a striker PRT, operated by the energy supplied by the relay.
  • There are 4 configurable LEDs. When the relay is switched off, their previous states can be checked by powering the relay up (by self-powering the relay, through USB cable, auxiliary voltage or pressing commissioning battery).
  • The SIA-B is fitted with the demand of current (load data profiling) with the following characteristics: Number of records: 168 Recording mode circular, Sampling rate (interval): configurable through communications: 1 – 60 min.
  • Non-volatile RAM memory in order to store up to 1.024 events, disturbance fault recording (DFR- 20 fault reports and 10 oscillographic records in COMTRADE format), maintaining date & time thanks to its internal RTC (Real Time Clock) even without power supply.

Protection Functions:

50 Instantaneous Phase Overcurrent
50/51 Inverse Time Phase Overcurrent
50G Instantaneous Neutral Overcurrent
50/51G Inverse Time Neutral Overcurrent
46 Negative Secquence Instant Overcurrent
49 Thermal image
CLP Cold Load Pickup
SHB Second Harmonic Blocking
50BF Circuit Breaker Opening Failure
52 Breaker wear Monitoring
86 Trip Output Lockout
49T External Trip
TB Trip Block Protection

The relay can be also supplied by a USB cable connected to the laptop, with the USB KITCOM adapter or an standard power bank.

SIA-B Specific CT’s

  • Dual & Self powered overcurrent protection relay using the operating current through three specific current transformers fitted on the lines. These transformers are also used to obtain current measurements. Optionally, SIAB relay can be used with auxiliary power supply (24 Vdc, 110 Vac or 230 Vac).
    The equipment can be occasionally supplied by an external battery portable kit (KITCOM).
  • Internal commissioning battery as optional.
  • 50, 50/51, 50N, 50/51N protection functions.
  • Trip block for switch disconnector + 49T + 49 as optional.
  • Its compact size makes SIA-B really easy to install and its light weight helps the customer to save costs in transport.
  • Low power consumption (0.5 W, 24 Vdc).
  • Non-volatile RAM memory in order to store up to 100 events and 4 fault reports, without power supply thanks to its internal RTC (Real Time Clock).
  • USB connection on the front (Modbus RTU communication protocol).
  • There are bistable magnetic indicators which indicate the trip cause, maintaining their position even though the relay loses the supply (flags).
  • In self powered modes, SIA-B starts-up from 0.4 Is of primary three phase current using specific CTs.

Protection Functions:

50 Instantaneous Phase Overcurrent
51 Phase inverse time overcurrent
50N Neutral instantaneous overcurrent
51N Neutral inverse time overcurrent
49 Thermal image
49T External trip
TB Trip Block for switch disconnector

Specifications