PRODUCTS - The Transformer and Electrical Co Ltd,Constant

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Transcript PRODUCTS - The Transformer and Electrical Co Ltd,Constant

PRODUCTS
TRANSFORMERS
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
TRANSFORMERS
DOUBLE 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
VARIATIONS
NUMBER 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
VARIATIONS
COOLING 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 SAVING
ENERGY 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.
TRX
TYPICAL 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 RECTIFIERS
RIPPLE 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.