DELTA SMPS or Site monitoring & Control System(SMCS) V30.11

 

1  SMCS Overview :

SMCS( Site Monitoring & control system) is power conditioning & distribution unit with several features aimed to meet passive requirement of telecom sites.This units unique solution for dual AC input power source conditioning,control and monitoring.

for the safety purpose of the equipment from lightning and surge,Class C surge protection devices are connected at the AC input side.

Heart of system is built around advanced ORION controller which manages and controls different modules to ensure  optional performance and unmatched efficiency.High and PLC based controller is able to monitor and manage all the passive components of the telecom site such as AC & DC distribution, Battery charging and many more.

Key feature of the system are programmable parameters which make it easy to work under different site conditions. User friendly front end LCD & LED display system measurements and setting are provided to know the present status/mode. Also programmable potential free contacts can be interfaced for remote monitoring.

2  System description : 

SMCS is designed with high efficiency components like DCPS (DC power system with high efficiency rectifiers), HPS and site monitoring alarms which reduced the losses and increased the efficiency.

SMCS has ultimate capacity upto 120 KW. It manage & control AC & DC loads at telecommunication site. It also maintained the fully charged Li-ion battery bank for the power backup.

SMCS synchronizes different modules  to perform desired operation for the control and monitoring the system parameters. Module design of SMCS gives freedom to the customer to choose the function for desire application by selecting the appropriate modules. All required system parameters are set at the controller unit. 

An integrated web server offers a user-friendly graphical interface for the detailed  monitoring and control of the SMCS using a web browser. SMCS can be accessed from visually anywhere, over internet or internet by modem. SMCS also allows remote alarms by means of potential-free relay contacts,modem, or LAN/Ethernet.

Fig 2.1 Architecture of SMCS

Line block diagram describes how various modules of the SMCS are synchronized with ORION controller unit to make complete system functional.

This system is designed to work in the indoor(IP20&IP21) application as per requirement.

IP20 & IP21 complient system is designed to work for the indoor applications and need to install inside the shelter with proper cooling arrangements.

3.  Introduction to different system :

Before starting with installation and commission let's get introduced to the important section of SMCS,Showing in fig 3.1  & 3.2

introduction to different sections will facilitate the installation procedure.

 Fig. 3.1 Door open view of SMCS

fig 3.2 Door close view of SMCS

3.1 DC Distribution units :

Extended DC distribution units consist of Load Fuses ( As shown in above fig 3.1). This units connects the DC loads to the SMCS. Rectifiers feed DC loads through fuses in DC distribution and battery bank feeds DC load through fuses in mounted in main cabinet.

3.2 OROPN Controller

ORION is a sophisticated power system controller that can be used for both small and very large, complex power systems. It consist of a single pluggable central unit, which provide basis I/o periphery. A very robust and reliable CAN standard- based communication bus(IMBUS) provides easy expansion.

                                                            fig  3.3 Isometric View of ORION

ORION uses external modules for monitoring system elements. this modules approach is perfect for expendable power systems with decentralized distributions (DBFB) and battery in separate rooms. this integrated PLC offers the flexibility for monitoring and auxiliary devices, system upgrades, and capacity expansions. 

The key function of ORION system include :

• Modular concept : ORION can be customized for both small and large system.
• flexible setup and supervision of battery-, source- and strings.
• AC mains voltage measuring without external equipment.
• The system integration via back plane
• Teleinfra E- Monitor  from ESI MU has potential to be offered to customers outside India, but communication via LAN should be added to enhance versatility
• Integration of third party devices to ORION

fig  3.4 ORION Front view

ORION allow remote alarm by means of potential-free relay contacts,modem, or LAN/Ethernet or via SMS

An integrated web server offers a user-friendly graphical interface for detailed monitoring and control using a web browser. The ORION can be accessed from virtually anywhere, over internet or internet by modem.

3.2 Rectifier Unit(SMPS Unit)

Rectifier Unit (SMPS Unit) section consists of High efficiency DPR 4000W Rectifiers. A total six number of rectifiers can be installed in one shelf. Rectifiers require a nominal input of 100/240 VAC and provide 48 VDC output for DC loads and battery bank charging. The number of rectifiers used depends upon the system requirements.

Fig 3.5 Rectifier Shelf

Rectifiers consist in the DCPS section. DC distribution section is directly fed through DCPS section.

3.3 Over voltage protection

Protection of system against overvoltage caused by different reasons like lightning, switching, short circuits, load changes, tolerances of the mains supply is very important. A proper protection concept is installed to achieve acceptable failure rates of the system. 

Concept of levels of protection : To profit from a transient overvoltage protection concept, it has to be installed correctly. The commonly used technique is a three level protection concept where transients are limited step by step. This concept is specified in IEC 60364-5-53/A2 and is applied all over the world. The concept is suitable for DC Power Systems with Rectifiers.

3.4 HPS (Healthy Phase Selector)

HPS module measures AC parameters like voltages, currents, frequency, power and energy. It is controlled by ORION controller module through HPS control card. AC supply received at HPS is provided to the rectifiers.

3.5 Auto Changeover Section

Auto Changeover section detects & monitors the dual source AC input supply. It switches between any of the available power sources either source 1 or source 2. Auto changeover section consists with Contactor and HPS (Healthy Phase Selector

3.6 AC Power Distribution Unit (ACPDU)

AC Power Distribution Unit is powered by direct supply from the dual input AC Source. This unit consists of all MCCBs which are provided for Source 1 & Source 2. This unit consists with Class C SPD also

3.7 LED driver board

The IOM-LED is a front end module, which can be used to extend the amount of peripherals in a modular manner. Up to nine IOM-LEDs can be connected to the IMBUS. The power supply is provided from the ORION.

The IOM-LED provides the following functions:

• 20 open collector outputs to drive LEDs.
• 2 digital inputs.
• The IOM-LED is available as an open frame module. An optional casing is available for DIN Rail mounting.

4   Do’s and Don’ts

4.1   Do’s

• Do make sure equipment is in proper working order and operating in a safe manner
• Attention and commitment to routine maintenance goes a long way to ensuring operator safety
• It is recommended to use electrical insulated hand gloves to avoid risk of shock.
• Ensure adequate insulation from ground potential (earth) when working on the rack or changing fuses.
• Fuses should only be gripped using the tools provided for this purpose (Fuse Puller etc.)
• Localized areas of high temperature may occur within the rectifier /distributer rack, therefore adequate precautions against accidental burns must be taken.
• AC/DC/control wire should be routed separately to avoid ORION control card failure during lightning.
• Ensure that the alarm limit values/trigger thresholds are set correctly. Incorrect settings may trigger false alarms and cause the rectifiers modules to switch off.
• SPD needs to be checked for fault tag during preventive maintenance. If found faulty, needs immediate replacement.
• All temporary manipulations of the equipment or parts there of that are carried out (e.g. for test purpose) must be reset manually. Automatic reset facilities are not provided.
• Ensure there are no loose connections AC, DC, System ground and check for the proper earthing of power plant

4.2  Dont’s

• Do not allow unskilled person to operate these equipments.
• Do not force the module into the slot. If it does not slide in and connect easily, remove and reinsert the unit.
• Do not touch the DC output Bus when pulling out the SMR module.
• Do not remove cover from any component /Module, it create risk & may affect performance.
• Do not use spray cleanser to clean the equipment. Using a spray cleanser directly on the equipment can result in serious equipment damage.