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300.365 HARMONIC FILTERS:

Harmonic filters shall be designed to meet the intent of EA BS G5/4, EN 61000-3-4, AS2279 and IEEE-519.
Harmonic Filter Systems shall be a low pass harmonic filter intended for use with one or more 6-pulse variable frequency drives and other 6-pulse, 3-phase diode or SCR rectifiers to eliminate as far as possible the input harmonic current reflected onto the power system.
Harmonic Filters shall treat all of the characteristic low frequency harmonics generated by a
3-phase, 6-pulse rectifier load including the 5th, 7th, 11th, 13th, 17th, 19th, 23rd, 25th, etc.
3-phase characteristic harmonics shall be suppressed without the need for tuning the filter or adjusting capacitors, inductors or other components.
Harmonic mitigation shall be by passive, series connected, low pass filter network consisting of inductors and capacitors plus damping resistors to prevent the possibility of filter excitation and resonance. IGBT based active filters shall not be used. Harmonic traps shall not be used. Harmonic attenuation shall be accomplished without the need for phase shifting loads against other harmonic sources.
To assure quality control and proper performance, the filter shall be manufactured in the supplier's own manufacturing facility, not by a contract manufacturer. Filters shall be fully tested prior to shipment.
The supplier shall provide evidence of relevant application experience of not less than 5 years upon request.
The harmonics filter shall be warranted to be free of defects in materials and workmanship for a period of one year from the date of shipment when applied in accordance with manufacturer's recommended installation procedures.
The harmonic filter shall be suitable for use with one or more 6-pulse drives, whether the rectifier consists of diodes or SCRs and whether or not the drives have internal inductance such as line reactors or de link chokes.
The Harmonic Filter shall be easy to select and simple to apply.
The characteristic three phase harmonics shall be filtered to guaranteed distortion levels and the filter warranty validated without the need for a manufacturer's representative to verify or validate the installation.
The filter shall be suitable for use with variable torque loads. The factory shall be consulted by the Contractor for selection of filters for constant torque loads.
The filter shall suppress characteristic harmonics to guaranteed levels provided that the power supply line voltage unbalance is between 0% and 1%. If the voltage unbalance is between 1% and 3%, per ANSI C84.1-1995, the total input harmonic current distortion at any reduced load condition shall not exceed the full load THID by more than 50% (i.e.: if 5%
THID at full load, then 7.5% THID at reduced load when voltage unbalance is >1%).

300.375 CONTROL PANELS AND MOTOR CONTROL CENTRES:
Where designated on the drawing, or the Mechanical Services Specification, all MCC's shall be constructed as described for L.V. Switchboards and in accordance with BS EN 60439-1
Form 4 Type 2 having draw-out cubicles.
All other control panels shall be of BS EN 60439-1 Form 2 construction and as generally constructed as described below for SMDB's but to the approval of the Engineer.
The MCC's and control panels which form part of the automatic control systems of the
Building Services systems, shall be fully coordinated to operate with the system to achieve the desired effects. For specific details of the MCC, operation, interlocks, controls and function refer to relevant Electrical and Mechanical Services Specifications and specification specifications 'V72' and 'V92'.
All MCC's and control panels shall be provided with instruments, indications, labelling, and all other relevant components described elsewhere in the specifications.
The panels shall be assembled at the factory and the Engineer reserves the right to inspect the manufacturer's workshop and equipment before approving the chosen manufacturer of the products. From time to time during the construction period 01 the products, the Engineer reserves the right to inspect the manufacturer's workshop and equipment to satisfy himself that the best workmanship is being employed.
The panels shall be suitable for operation of 400V, 3-phase, 4-wire, 50 Hz and full neutral in all circuits. The control circuit supplies shall be 230V, 50 Hz, Line to neutral. All equipment shall be rated at 50'C ambient temperature and 90% relative humidity.
Construction and finish shall be as specified in Y71.2020A. Degree of ingress protection shall be in accordance with BS EN 60529, IP54.
The MCC's and other control panels shall house all components required for the proper and safe functioning 01 the mechanical plant in line with the design intent and control philosophy detailed in these documents and the mechanical services specifications.
VFD starter sections must be provided with auxiliary contacts to interface with the local equipment isolator to ensure disconnection of VFD prior to local isolation
On the front of each panel H-O-A switches shall be fitted for all equipment controlled from that panel including indications for 'Run', 'Trip' etc, Ammeters for all motors above 5 kW rating, indications such as power ON, control power ON, hour run meters (where specified), audible alarm (with Mute push button) for common fault on panel and other indications as described elsewhere in the specification. The audible alarm shall be used to annunciate an audio alarm.
All MCC's and pump control panels (all pumps including transfer and BCW) shall include:
• Timers for staggered starting of the connected motors
• Ammeters for all motors above 5kW

300.385 VARIABLE FREQUENCY DRIVES
Particular Specification - Part B
Section V20
Each VFD shall be designed and manufactured in accordance with the current edition of the following European and international standards and directives:
• EN 55011 - Limits and methods of measurement of radio disturbance characteristics
(EMC Emission).
• EN 50178 - Electronic equipment for use in Power Installations.
• EN 61800-3 - Adjustable speed electrical power drive systems - Part 3: EMC product standard. • EN 61000-3-2 - Limits for harmonic current emissions (equipment input current below
16 A per phase).
• prEN 61000-3-4 - Limits for harmonic current emissions (equipment input current above 16 A per phase).
• ENV 50140 - EMC/Radiated radio frequency electrical field (simulation of impact from
GSM telephones).
• EMC Directive 89/336/EEC.
• Low Voltage Directive 73/231EEC.
• EN50082-2 - Generic Immunity, Industry.
• EN61 000-4-2/IEC 1000-4-2 - Electrostatic Discharge (EMC Immunity).
• EN61 000-4-3/IEC 1000-4-3 - Radiated electromagnetic field (EMC Immunity).
• EN61 000-4-4/IEC 1000-4-4 - Burst (EMC Immunity).
• EN61 000-4-5/IEC 1000-4-5 - Surge (EMC Immunity).
• EN61 000-4-6/IEC 1000-4-6 - Cable born HF (EMC Immunity).
• UK Electricity Council Recommendation G5I3 Stage 2 (EMC Emission).
Design Criteria:
Variable frequency drives shall be designed for HVAC and Pump applications, shall be of the pulse width modulated voltage vector control type, and shall be able to operate any asynchronous AC motor with a variable torque load.
Regulatory Requirements:
The variable frequency drives shall be CE marked in accordance with the EMC Directive
89/336/EEC and the Low Voltage Directive 73/231EEC.
A Manufacturers Declaration shall be issued in accordance with the Machine Directive
89/3921EEC and amendments 91/3681EEC and 93/44/EEC.
Conducted Radio Frequency Interference (RFI) shall be in accordance with EN 55011 Group
1 Class B with built-in RFI filters.
Total Harmonic Voltage Distortion in the electrical power system shall not exceed 5% at the
Point of Common Coupling (transformer secondary side).
The variable frequency drive immunity shall be in accordance with EN 50082-2.
The manufacturer shall be certified in accordance with ISO 14001: Environmental.
Quality Assurance:
Variable frequency drives shall be manufactured in accordance with ISO 9001: Quality
Systems.
To ensure quality and minimise infantile failures at the site, every VFD shall be type tested by the manufacturer. The VFD shall operate a dynamometer at full load, and the load and speed shall be cycled during the test.

All optional features shall be functionally tested at the factory for proper operation.
Submittals:
Submit installation and manufacturer's drawings and performance data including:
1) dimensional and layout drawings
2) power circuit diagrams
3) installation and maintenance manuals
4) warranty description
5) VFD's full load ampere rating
6) Third Party certification agency file numbers
7) catalogue information
8) VFD selection chart based on actual equipment loads
9) Protection settings schedule.

The specification lists the minimum VFD performance requirements for this project. Each supplier shall list any exceptions to the specification. If no departures from the specification are identified, the supplier shall be bound by the specification.
The VFD manufacturer shall carry out a harmonics study to determine compliance with the standards listed under section 370.130 and at the Point of Common Coupling prior to commencement of contract. Refer to and comply with Y71. 2280A.
Where specified, necessary provision shall be made for interfacing with the BMS (or other remote panel) as required.
Motors for Equipment with VFD shall comply with the following:
• The variable frequency drive motors shall be tested in accordance with VFD and motor manufacturers specific recommendations.

• The motor shall be of a special high efficiency design specifically intended for variable load and variable speed applications to provide optimized efficiency performance at partial load conditions.
The Contractor shall ensure ADDC/ADWEA approval of the VFD proposed before procurement. 300.395 PROGRAMMABLE LOGIC CONTROLLERS:
The Contractor shall provide the Control systems shall be in accordance with the
Performance Criteria Section of this specification and as detailed on the applicable Drawings and schedules. Each PLC system shall include but not to be limited to: a processor adapter
(CPU) mounted on a local 110 module, distributed 110 modules that include communications interface adapter, software for applications programming, operator interface system diagnostics, communications, data acquisition, connectors, and cables.
PLC's shall read input data, solve control logic, write output data, and communicate with other PLC's and devices using a communication network to distribute operational information. The control programs shall have the facility to be down loaded from programmer's terminal locally to the PLC or connected to a communication network for remote programming.
PLC's system shall have the flexibility in their design to be configured as a stand-alone system with local and/or distributed 110 modules, and a distributed control system with multiple PLC's communicating over a communication network. The PLC's shall have provisions for communicating unsolicited messages (report by exception) to an operator interface to reduce network traffic.

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Electrical Installation Standards

...MINISTRY OF POWER AND MINERAL RESOURCES OF THE REPUBLIC OF KAZAKHSTAN APPROVED by Prikaz No 189 of the Minister of Power and Mineral Resources of the Republic of Kazakhstan, as of August 26, 2004.) REGULATIONS ON ELECTRICAL INSTALLATIONS OF THE REPUBLIC OF KAZAKHSTAN (PUE) Astana, 2003 TABLE OF CONTENTS SECTION 1: GENERAL REGULATIONS 10 CHAPTER 1.1: GENERAL 10 SCOPE, TERMS AND DEFINITIONS 10 GENERAL REGULATIONS FOR INSTALLATION OF ELECTRICAL EQUIPMENT 11 CONNECTION OF ELECTRICAL INSTALLATIONS TO THE POWER STATIONS 13 COMMISSIONING OF ELECTRICAL INSTALLATIONS 14 CHAPTER 1.2 POWER SUPPLY AND POWER SYSTEMS 14 SCOPE, DEFINITIONS 14 GENERAL REQUIREMENTS 14 CATEGORIES OF POWER CONSUMING DEVICES AND RELIABILITY OF POWER SUPPLY 15 VOLTAGE LEVELS AND CONTROLS, REACTIVE POWER COMPENSATION 16 CHAPTER 1.3 SELECTION OF CONDUCTORS: HEATING, CURRENT DENSITY AND CORONA DISCHARGE CONDITIONS 16 SCOPE 16 SELECTION OF CROSS-SECTION OF CONDUCTORS: HEATING 17 MAXUIMUM CONTINUOUS CURRENTS FOR WIRES, CORDS AND CABLES IN RUBBER OR PLASTIC INSULATION 18 MAXIMUM CONTINUOUS CURRENTS FOR CABLES IN IMPREGNATED PAPER INSULATION 22 MAXIMUM CONTINUOUS CURRENTS FOR BARE WIRES...

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