- MV Panels
PLC implementation of Firemen Remote Panel (FRP) for MV Fan system of commercial and residential buildings.
Local Control Panel
Control Panel (LCP) is an essential electrical system that connects the
control power from the electrical isolator to the motor of the ACMV
equipment. It is wired with essential electrical components for safety
and electrical protection purposes. Such as MCB and RCB as illustrated
in Figure 1.
from safety and protection, the LCP provides the Interlocking Circuits
for interface with respective monitoring and control systems of the
building, such as:-
- Firemen Remote Panel (FRP) at FCC Room
- Building Automation System (BAS) at the Adminstration Office
Controls are implemented using Relay-Logic as illustrated in Figure 2. Provisions
for Interlocking Circuits to FRP and BAS systems are in the form of
Volt-Free contacts and low voltage signals as shown in Figure 3.
Cabling Requirement for these
Interlocking Circuits is very substantial. For example, for each and
every LCP, the requirements are :-
- To FRP system - 8 x 1C 1mm2 FR Cable
- To BAS system - 8 x 1C 1mm2 PVC Cable
For MV Fan system with 26
fans, the above interlocking circuits will be multiplied by 26 times.
For example, to FRP sysyem — 26 x 8 x 1C 1mm2 FR Cable
lnterlocking Cables from LCP to FRP and BAS System
below shows the Interlocking cables from field local Control Panels to
Firemen Remote Panel at FCC and BAS computer in administration office.
Cabling From Each and every Local Control Panel to FRP/ BAS system
- FRP - 8 x 1c 1mm2 FR cable
- BAS - 8 x 1c 1mm2 PVC cable
Summary of Cabling Requirements for Interlocking Circuits
- 83.2 km of 1C 1mm2/ 10.4 km of 1 x 8C 1mm2 FR Cable
- 10.4 km of 1C 1mm2/ 1.3km of 1 x 8C 1mm2 PVC Cable
- 800 m of 1P STP 1mm2 PVC Network Cable
As illustrated above, the cabling required is very substantial with
tens of kilometers of cables. The strategy in adoption of PLC system
for FRP (to save cost) is to collapse these tens of kilometers of
cables to a network single cable and at a fraction of the cable
IP2 PLC Implementation
the LCP with IP2 PLC RTU eliminates the need of Relay-Logic and most
importantly to digitize the IO signals. Such that, IO information can
be communicated with the FRP and BAS systems electronically using PLC
networks and without the need for provisions of physical volt-free
contacts and low voltage signals. Figure 6, illustrates the use of IP2
PLC RTU to automate the LCP. IP2 PLC RTU has two (2) Industrial
- CAN Fieldbus — Network to FRP
- RS485 Modbus — Network to BAS
Cabling Requirement for Interlocking Circuits is now in the form of electronic networks as illustrated in Figure 7.
- Network to FRP system - 1P STP 1mm2 FR
- Network to BAS system - 1P STP 1mm2 PVC
Building Automation System
PLC RTU units are equipped with RS485 Modbus network. Without any
further investments in hardware (eg. BAS DDC Controllers), the BAS
system can be implemented by using any Off-the-shelf PC-based SCADA
software. Huge Savings.
Summary of Cost Savings with MV Panels
Tens of kilometers of FR cables can be collapsed into mere few hundreds of meters of network cable.
Application Note for MV Fan Automation [ Brochure ]
Application Note for MV Panels [ Brochure ]
On-line technical support available to assist in design of single line drawings.