Power Supply Module

All versions of Omega Air Circuit Breakers with MATRIX releases are self- powered. Display (O-LED type) is a standard feature in MATRIX Protection & Control (P&C) Units (MTX-1.5G Onwards) and it needs 10% of I-frame value to Power-Up through CTs.

If an auxiliary power source of 24Vdc (thru PS Module or any controlled supply source) is available, display will get Power-Up at NO-load/OFF condition also in these units (MTX-2.5 onwards).

1. It shall be possible to alter protection settings while ACB is in OFF condition through navigation keys.
2. If it is desired to see details of Fault/Event History after the ACB has tripped on Fault. However last trip record will be available on display without auxiliary power through Query button in P&C Unit.
3. To communicate with P&C Unit while ACB is in OFF condition.
4. For Powering-Up Modules like ZSI, UN-CO, etc.
5. Necessary to build communication between P&C Unit and external modules like REL, TCS, DIO, AO, TM, EF & REF

1. For point no.1, 2, 3 & 4 it is not necessary to use PS Module available with L&T only. Any continuous source of controlled 24V DC can serve the purpose. (Applicable for versions– MTX2.5/2.5G/3.5/3.5EC/3.5H/4.5)
2. For point no. 5, PS Module available with L&T is must to hardware each & all external module to get desired features (Applicable in MTX3.5/3.5EC/3.5H/4.5). In this case each MATRIX release needs a PS Module.
3. Before providing auxiliary power supply to MATRIX P&CU it is necessary to know the VA burden of MATRIX P&C Unit & Modules for the calculation of total VA demand.

Power Supply Module have 3 sets of auxiliary power output. Set - 2 & 3’s combined VA burden is 15.5VA & Set -1 with an additional VA burden of 4.8VA. So, total output power available from PS Module is 20.3VA.

Note:-

Power output set -2 or 3, has to be loaded first, while connecting P&C Unit & External Modules with Power Supply Module.

Recommended wire for connection of MATRIX release with PS Module through AS+/AS- SIC port in ACB is 24AWG ( 7/0.2).

Let us consider a Panel Board having 5 nos. Omega ACBs of different MATRIX P&C Units & auxiliary power has to be supplied through PS Module as there is no auxiliary power (24Vdc) source available–

1. Incomer ACB is with MTX3.5EC + ZSI - 1 no.
2. Outgoing ACBs are with MTX3.5 + Modbus COM + ZSI – 3 nos.

Solution: Total VA requirement of all P&CU & Modules are as follows:

Max VA available through PS module:

O/P set 1: 4.8 VA

O/P set 2: 15.6 VA

So, using only a single PS Module, the above set up can be powered ON.

However, above PS module quantity selection can vary depending on the location/distance of the modules in the panel as well as the type of module used (refer Point A Note I, II, III)

Cat no – CL90722OOOO