AAA Infotek Limited

AUTOMATIC TRANSFER SWITCH (ATS) PANEL
This is a triple input Automatic Transfer Switch panel used to control two generator sets and one PHCN source. It is designed around two microprocessor based AMF (Automatic Mains Fail) modules. The ATS is capable of switching load between the two generators at a set timed interval in absence of mains supply. When a fault occurs on a running generator, the ATS will start the idle generator. It also has the option of master / slave arrangement for the generators.

ATS FUNCTIONS
The controller for the diesel generator set performs the voltage, power and frequency parameters (programmable by the operator) of the mains and diesel alternator sets.
Oil pressure parameters (programmable by the operator) of the diesel generator sets.
High Temperature parameters(programmable by the operator) of the diesel generator set.
Starting and Stopping of the generator sets as well as switching between the generator sets are designed to balance the runtime evenly. If a fault occurs on the running generator, the idle one is started even if the time to switch is not due. A summary alarm is then generated and send to the telemetry system for the dispatch of field team to rectify the fault.

The automatic control makes provision for programmable crank, rest, number of start attempt of the generator sets. In case of a failure to start, the indication of the fault is activated on the controller and voltage free contact is also provided for the fail to start fault condition.
All power input sources of PHCN, Generator 1 and Generator 2 are connected by mechanical and electrical interlocks of the contactors.

The load consumed in KW and power factor are measured at all times. In case of excess power consumption, (which is programmable by the operator) the panel disconnects the load and shut down the generator set.
Voltage free alarm contacts and terminals showing sections for the generator sets and other alarms are provided.

A bypass switch to bypass the mains around the ATS is provided and it is designed such that there cannot be accidental short circuit. It also has Normal, Bypass and OFF positions.
A five pin industrial male connector of IP 67 protection rating is mounted on the side of the control cabinet to enable a mobile generator to be connected to the system in an emergency, through a manual change over.

SUMMARY OF THE FEATURES OF THE ATS

Microprocessor based controller

Compatible with all diesel generators

2 Generators and 1 PHCN Input

1 emergency (mobile) generator input

Battery charger

Indicator lamp

Generator swap mode

Generator Master / Slave mode

Second generator auto back up when running generator fails

Generator fault alarm output

Generator start fail alarm output

Generator on load alarm output

Mains fail alarm output

Automatic mains failure

Engine Control

Built in alarm and warning

3 mains phase voltage input

3 phase generator voltage input

Engine oil pressure measurement

3 phase generator CT input

Generator sets Power factor measurement

Remote monitoring through

LAN connection
IP addressing
Modem communication

LED display

Available capacities

2KVA – 5000KVA

Periodic Maintenance request indicator
Field adjustable parameters
Engine hour counter
Event logging
Statistical counter

TECHNICAL PARAMETERS

Alternator Voltage: 0 to300VAC Phase to Neutral

0 to 520VAC Phase to Phase

Alternator Frequency: 0 to 100Hz
Mains Voltage: 0 to300VAC Phase to Neutral

0 to 520VAC Phase to Phase

Mains Frequency: 0 to 100Hz
DC Supply range: 9.0 to 30.0 VDC
Cracking drop outs: survives: 0 V for 100ms
Typical standby current consumption: 130mA DC
Maximum current consumption: 250mA DC
Generator / Mains contactor Output: 16A at 250VAC
DC output: 3A at 28VDC Protected semiconductor output
Charge alternator excitation current: min 150 mA DC at 10 to 30VDC
Current Inputs from current transformer: 5A Max load 0.7VA per phase
Digital Input Voltage: 0 to 30 VDC. Internally connected to battery positive via a 4k700 ohms
Analogue inputs: Resistor input 0 to 5k000 ohms connected to battery negative. 10mA when connected to battery
Measurement category: CAT II
Air category: Pollution degree II
Communication ports: RS -232, 9600 Bauds, no parity, 1 stop bit
Operating temperature range: -200C to +700C (-40F to +1580F)
Storage Temperature range : -400C to +800C (-400F to +1760F)
Maximum Humidity: 95%, non condensing
IP Protection: Ip55

ATS CABINET / ENCLOSURE SPECIFICATION

Impact Rating: Ip55
Compliance Code: IEC 60529
Operating Environment: Weather proof and UV resistance
Cable Entry: Bottom via removable glands
Door: 180 degree single swing with double locks
Sheet Metal type RAL 7032 Powder paint

guage and finishing:

Safety Compliance Code: IEEEC2

CONCLUSION
Our ATS, and DBs are of high quality, industry standard and well designed for compatibility with any electric generator. With the global recession that is challenging most existing businesses today, industries and businesses all over the world are trying to minimize the cost of doing business one way or the other. We seek the interest of our customers and we make our pricing very reasonable and to fit in into the business plans of our clients.
One advantage to be enjoyed by patronizing our products and services in the quality and integrity of our support systems. Our team of experienced and well trained staff has the required industrial and telecoms site knowledge to enable us meet your needs effectively and efficiently. We also have the advantage of wide, deep and relevance experiences in the businesses of Power Control systems with over 700 sites already covered in Sales, Installation, repairs and maintenance.

Product range
We are capable of designing, assembling, repairing and maintaining any type of ATS panel ranging from a power rating of 5KVA to 5000KVA. This include

Single ATS panel
Dual ATS panel
Synchronizing panels for up to 8 generators and mains
Hybrid ATS for telecoms industry
Outdoor AC Distribution Board
Indoor AC Distribution Board

This is a drawing showing the electrical and RF connection for a base transceiver station site.