PRODUCTSTRANSFORMERS

ENERGY SAVING TRANSFORMERS (EST)

TRANSFORMER RECTIFIER UNITS

3rd HARMONIC REJECTION TRANSFORMERS (HRT)

ULTRA HIGH ISOLATION TRANSFORMERS (TRX)

CONSTANT VOLTAGE TRANSFORMERS (CVT/VCT/HST)

VARIABLE UNITS

TRANSFORMERS

AUTO WOUND

NON ISOLATED SUPPLY

NORMALLY USED FOR TRANSFORMING VOLTAGES WITHIN A SMALL MARGIN OF THE INCOMING MAINS

ie: 100 KVA UNIT, 415 VOLTS TO 380 VOLTS

EQUIVALENT FRAME SIZE WOULD BE 8.4KVA

AUTOWOUND

TRANSFORMERSDOUBLE WOUND

ISOLATED SUPPLY

INPUT AND OUTPUT ELECTRICAL SEPARATE

ANY VOLTAGE RANGE

DOUBLE WOUND

VARIATIONS AUTOWOUND (A.W.) OR DOUBLE WOUND (D.W.)

INPUT VOLTS AND TAPPINGS

FREQUENCY 50Hz OR 60Hz OR BOTH OR OTHER?

CURRENT RATING OR KVA

OUTPUT VOLTS AND TAPPINGS

FREQUENCY 50Hz OR 60Hz OR BOTH OR OTHER?

CURRENT RATING OR KVA

VARIATIONSNUMBER OF PHASES

SINGLE PHASE (generally Line to Neutral volts)

2 PHASE (Generally the same as single phase except across two lines ie: 415 volts)

3 to 2 PHASE (SCOTT CONNECTED)

3 to 1 PHASE

3 PHASE (Vector group or connection ie: DYn11, DYn1, Dd0 etc this information tell us how to connect the windings and work out the currents in the phase’s

VARIATIONSCOOLING MEDIUM

NATURALLY AIR COOLED

OIL COOLED

FORCED AIR COOLED

AMBIENT TEMPERATURE ( this will govern the temperature rise in the coil for the Class of insulation)

Temperature rise Class ( O, A, E, F, H, C)

Insulation Class ( O, A, E, F, H, C)

VARIATIONS

OPEN TYPE OR ENCLOSED

ENCLOSED TYPE IP PROTECTION RANGE FROM IP22 TO IP54

IP65 NORMALLY QUOTE AS OIL IMMERSED

OTHER FURNITURE ie: FUSES, METERS TAP CHANGING SWITCHES, ISOLATOR SWITCHES, CONTACTORS, REGAVOLTS? Etc.

VARIATIONS

ALL TRANSFORMERS ARE BUILT TO BS OR IEC SPECIFICATIONS

BS 171 POWER TRANSFORMERS

BS 3535 ISOLATING TRANSFORMERS

BS EN 60076-1 & -2 POWER TRANSFORMERS

IEC 61558 pt 2.1 , 2.4, 2.6 SAFETY OF POWER TRANSFORMERS

BS EN 60601 / BS5724 MEDICAL ELECTRICAL EQUIPMENT

JUST SOME OF THE MANY THAT MAY BE QUOTED

VARIATIONS

“CE” BADGING EN61010 (1993)

AS PART OF THE “EMC” AND “LVD” DIRECTIVES ALL EQUIPMENT THAT IS HOUSED AND FITTED WITH AUXILLIARY EQUIPMENT IS REQUIRED TO BE “CE” BADGED AND A DECLARATION OF CONFORMITY ISSUED.

ENERGY SAVING

PRINCIPAL OBJECT OF THE PRODUCT IS TO REDUCE INPUT VOLTS

MOST MODERN EQUIPMENT IS SUITABLE TO WORK FROM 207 / 254Volts

THEREFORE THE NEARER TO THE EQUIPMENTS OPTIMUM OPERATING VOLTAGE THE LESS CURRENT IS BEING USED.

BENEFITS INCLUDE LESS POWER CONSUMPTION LOWER ELECTRICITY BILLS, LONGER LIFE OF EQUIPMENT

ENERGY SAVING

TWO SOLUTIONS TO THE SAME PROBLEM

EST = ENERGY SAVING TRANSFORMER

LIMITATIONS

FIXED TAPPING STEPS

UNIT FOLLOWS MAINS FLUCTUATIONS SO IF NORMAL VOLTS FALL THE STEP DOWN VOLTAGE FALLS AS WELL LEADING TO POSSIBLE PROBLEMS THEREFORE MAXIMUM VOLT DROP 8/9%

NORMAL VOLT DROPS ARE 3% 5% 7%

ENERGY SAVING

ESS = ENERGY SAVING STABILISER

CAN STEP VOLTAGE DOWN LOWER THAN (EST) OUTPUT VOLTAGE REMAINS STABLE REGARDLESS OF MAINS FLUCTUATIONS (WITHIN SET PARAMETERS 12.5% approx, THEN IT WILL TRACK MAINS)

ADDED BENEFIT OF KEEPING EACH PHASE INDEPENDENTLY CONSTANT, WHICH CAN ADD TO MOTOR LIFE

ENERGY SAVINGENERGY SAVING UNITS WILL NOT WORK ON ALL LOADS?

SWITCH MODE POWER SUPPLIES ie ( COMPUTER SUPPLIES)

HIGH FREQUENCY BALLAST LIGHTING ?????

HRT

3RD HARMONIC REJECTION TRANSFORMERS

NON LINEAR LOADS GENERATE HARMONICS

DESIGNED TO ELIMINATE PRIMARILY MULTIPLES OF THE 3RD HARMONICS AND SOME OF THE 5THS

HRT

PRODUCT BENEFITS

EASE OF INSTALLATION (can be installed without switching off the supply as fitted in parallel)

REDUCES HARMONICS

REDUCES NEUTRAL CURRENT (high neutral currents can burn out transformers that have not been designed for the purpose, and more consumption of power)

REDUCES PHASE CURRENTS

REDUCES TRANSFORMER OVERLOADING

TRX

ULTRA HIGH ISOLATION TRANSFORMERS

DESIGNED TO PROTECT COMPUTERS AND OTHER SENSITIVE EQUIPMENT FROM VOLTAGE TRANSIENTS, SPIKES, NOISE etc.

TRXTYPICAL SPECIFICATION

TRANSIENT SUPPRESSION

COMMON MODE 88dB

TRANSVERSE MODE 65dB

NOISE SUPPRESSION

COMMON MODE 120dB

TRANSVERSE MODE 65dB

SINGLE PHASE OR 3 PHASE UNITS AVAILABLE

CONSTANT VOLTGE CVT/VCT/HST

WILL SUPPLY A REGULATED OUTPUT VOLTAGE REGARDLESS OF MAINS FLUCTUATIONS

SHORT CIRCUIT PROOF ALMOST INDESTRUCTABLE

HAS A LIMITED STORAGE CAPACITY FOR A PERIOD OF HALF CYCLE

CONSTANT VOLTAGE CVT/VCT/HST

INPUT VOLTAGE TOLERANCE +-15%

OUTPUT ACCURACY +-3%

WAVEFORM REMAINS SINOSOIDAL WITH LESS THAN 3% HARMONIC DISTORTION

EFFICIENCY GREATER THAN 80%

FREQUENCY MUST BE 50Hz OR 60Hz

AVAILABLE IN VOLTAGES FROM 110 – 440 VOLTS

AVAILABLE IN SINGLE PHASE OR 3 PHASE

THERE IS A LIMITATION ON SIZE???

TRANSFORMER RECTIFIERS

TYPICAL UNITS WILL BE SINGLE PHASE BRIDGE RECTIFIED OR 3 PHASE BRIDGE RECTIFED

SINGLE PHASE BRIDGE RECTIFIER

TYPICAL RIPPLE CONTENT 48%

CAN BE SMOOTHED VIA CHOKE / CAPACITOR CIRCUIT TO APPROX 5-10%

MAY INCREASE OFF LOAD VOLTAGES (so information concerning maximum off load volts may be required)

TRANSFORMER RECTIFIERS

TRANSFORMER RECTIFIERS

3 PHASE BRIDGE RECTIFER

TYPICAL RIPPLE CONTENT 5%

TRANSFORMER RECTIFIERSRIPPLE CONTENT CAN BE LOWERED BY SIX PHASE (12 PULSE RECTIFIER UNITS) TYPICAL RIPPLE CONTENT 1%

VARIABLE UNITS

A CLAUDE LYONS VARIABLE CAN BE ADDED TO THE MAJORITY OF THE TRANSFORMERS (auto and double wound) DISCUSSED, AND RECTIFIER UNITS.

THERE ARE LIMITATIONS

THE REGAVOLT IS MANUFACTURED IN STRICT CURRENT CARRYING CAPACITY MODELS, TO INCREASE THIS CAPABILITY MULTIPLE MODELS ARE GANGED TOGETHER SO LIMITATIONS ARE PURELY PHYSICAL.

VARIABLE UNITS

TO OVERCOME THIS OTHER ALTERNATIVE’S CAN BE OFFERED

A BUCK/BOOST UNIT WHERE THE CUSTOMER ONLY WISHES TO VARY A SMALL AMOUNT AROUND A VOLTAGE

A TAPPED BUCK/BOOST UNIT WHERE THE CUSTOMER WISHES ZERO TO (X) VOLTS A FIXED TRANSFORMER IS TAPPED IN EQUAL STEPS SELECTED VIA A SWITCH AND A SMALLER VARIABLE TRANSFORMER IS CONNECTED IN SERIES WITH THE OUTPUT.