Control Transformers

Transcription

1 J., APRJL, 1983 SUP RSEPES1/8111TION Control Transformers FILE: Control Products Catalog Machine Tool Transformer Disconnects CONTENTS Description Class Pages General Application Data Selection Guide Dimensions Transformer Disconnects I,,SQUARED COMPANY 1 www. ElectricalPartManuals ElectricalPartManuals. com com

2 II I SQUARED COMPANY 4/83 TP Printed in U.S.A.

3 Sheet Page 1 December, 1966 Continuous VA 6 Hertz 5 Hertz Hertz 2448/ / I 11 o 6/12 575/115 55/ /24 CONTROL CIRCUIT TRANSFORMERS 5 Hertz may be applied to 6 Hertz transformer at reduced VA rating shown. Do not apply 25 Hertz to transformer rated at 6 Hertz. Windings of 25 Hertz transformers differ from 5 and 6 Hertz transformers. 25 Hertz STANDARD VOLTAGES 5 Hertz 25 Hertz 2346/ / /11 575/ / /24 55/11 E1 AP1 and AP2 fuse block and bracket assemblies are available for use on s E1 through E4 transformers. In the case of open type transformers, these assemblies are furnished as separate items to provide The AP1 includes a fuse block lor an NEC (3 amp., 25 Volts max.) fuse and a bracket which is held in place by a screw on the transformer. Two AP1 assemblies can be mounted on each transformer. E2 E3 E4 E5 E6 E7 E8 E9 Standard Voltage Transformers 97 PAGE 1 Open General Purpose Enclosure NEMA 1 $ 12. EG1 $ EG EG EG EG EG EG EG EG NONSTANDARD VOLTAGES Description Nonstandard single primary and/or single secondary voltage rating Nonstandard dual voltage primary with any single voltage secondary rating. SECONDARY CIRCUIT PROTECTION E1 Transformer with AP1 Fuse Block Installed AP1 $3. Addition $5. 7. maximum flexibility with m1mmum stocking. Factory mounted assemblies are only available on enclosed type transformers. The AP2 fuse block has been designed especially for use with the E transformer. It consists of a fuse holder for a 1 V." x V." fuse (3 amp., 25 Volts max.), a bracket for holding the assembly on the transformer and a lead assembly lor connecting the fuse to one of the transformer terminals. The bracket is furnished with a tapped hole and is held in position by one of the screws on the transformer. Two AP2 assemblies can be mounted on each transformer. FACTORY MOUNTED FUSE ASSEMBLIES FOR ENCLOSED TRANSFORMERS Description NEC fuse block, AP1, (3 A., 25 V.) mounted in transformer enclosure (NEMA 1 only.) One fuse block Two fuse blocks.. ORDERING INFORMATION REQUIRED Class, type, VA rating, voltage, and fuse block or form number, if any. E1 Transformer w1th AP2 Fuse Block Installed AP2 3. Form F2 F3 Addition www. ElectricalPartManuals ElectricalPartManuals. com com :::::::: :::S!_!Q!l!U!:!)A RE D CD MPANY s subject to change without notice. ;: SCHEDULE DS1 DISCOUNTS $4. 8.

4 97 PAGE 2 APPLICATION Control circuit transformers are widely used to reduce control circuit voltages for many reasons, the most important of which are as follows: 1. Operator safety is increased by the use of a low voltage at the control stations and other pilot devices. Also, because of the reduced potential, there is less chance of a fault occurring between lines of the control circuit wiring or to ground. 2. Simplifies voltage changeover of complicated control panels the transformer is replaced, or, in the case of a transformer with a dual primary, the primary windings are reconnected instead of changing the magnet coil of each device. REGULATION E control circuit transformers are designed specifically for use with industrial control equipment. Devices such as starters, contactors, relays, timers and solenoids are characterized by high, momentary inrush currents to the magnet operating coil during the pickup period. These devices require a transformer with excellent voltage regulation to keep the voltage drop in the transformer to a minimum when high inrush currents are encountered. Otherwise the voltage applied to the coil will be too low to provide satisfactory pickup. Selection of a proper control circuit transformer must be made from a determination of the maximum inrush VA and the maximum continuous VA to which it is subjected. This data can be determined as follows: 1. Determine inrush and sealed VA of all coils to be used. 2. Determine maximum sealed VA load on the transformer. 3. Determine the maximum inrush VA load on the transformer at 1 per cent secondary voltage. Add this value vectorially to any sealed VA present at time inrush occurs. 4. Calculate the power factor of the VA load obtained in (3). Actual coil power factors should be used. If this value is unknown, an inrush power factor of 3% may be assumed. 5. Select a transformer: (a) With a continuous VA rating equal to or greater than the value obtained in (2) and (b) Whose maximum inrush VA from (3) at the load power factor calculated in (4) falls on or below the corresponding curve in Fig. 15 for the transformer selected in (5a). CONTROL CIRCUIT TRANSFORMERS APPLICATION DATA SELECTION OF TRANSFORMERS Descriptive Sheet Pages 12 January, 1963 NEMA standards require magnetic devices such as starters to operate satisfactorily at 85% of rated voltage. Allowing for a line voltage of 1% below rated voltage, the voltage drop of the transformer is limited to 5% to insure continued satisfactory operation. E transformers are designed with windings of low impedance to provide this excellent voltage regulation see regulation curves on pages 3 and 4. Good transformer regulation characteristics are essential in order that transformer selection can be made on the basis of continuous VA rating which is always the most economical choice. CONSTRUCTION E transformers are compact in design and built for control panel mounting. Oblong mounting holes, directly accessible from the front, are provided to simplify mounting and alignment of the transformer on the panel. Screw type terminals are accessible from the front and eliminate terminal boards or splicing usually required with flexible leads. Each terminal is clearly marked and correct connections for the voltage desired are shown on the nameplate which is mounted on top of the transformer for easy reference. Transformer coils are precision layerwound with insulating paper between layers of wire and are well insulated between primary and secondary, and to ground. Maximum temperature rise is limited to 55 a C. Windings are of additive polarity. ENCLOSURES NEMA 1 general purpose enclosures are intended to prevent accidental contact with live parts and are suitable for general indoor use where normal atmospheric conditions prevail. Enclosures are constructed of sheet steel finished in a standard gray enamel. s EG1 through EG4 enclosures are furnished with slipon covers. Enclosures for s EG5 through EG7 are provided with a hinged cover. E transformers may be used with Square D Class 852 contactors and Class 8536 starters as follows: TYPES A THRU G CONTACTORS AND STARTERS Starter or Contactor NEMA Size 6/5 Hertz 25/3 Hertz E1, and 1 E2 2 and 1 E3 3 and 4 2 E4 3 and 4 NOTE: Standard eng1neenng pract1ce for S1ze 5 and larger contactors IS to use a 5 VA transformer and a control relay. lh&a:t CONTACTORS AND STARTERS NEMA of No. of Auxiliary Size Device Poles Units W/ Timer E1 and 1 Non 13 3 External Interlocks Reversing W/Timer 2 External Interlocks With or Without Non 4 and 5 External Interlock and 1 Reversing or Timer With and E2 Reversing 15 Without Any Attachment Non With and 2 Reversing & 15 Without Reversing Any Attachment Non With and E3 3* Reversing & 3 Without Reversing Any Attachment *For S1ze 3m NE MA s 1, 4 or 12 enclosures, use 97 GFT3 transformer kit. Refer to Page 11 for application information and pricing. www. ElectricalPartManuals ElectricalPartManuals. com com SQUR REDtDMPRNY ::a

5 Descriptive Sheet Page 3 January, 1963 REGULATION CURVES 97 PAGE 3 These curves indicate maximum permissible, inrush loads (voltamperes at 1% secondary voltage) which, if applied to the transformer secondary, will not cause the secondary voltage to drop below 85% of rated voltage when the primary voltage has been reduced to 9% of rated voltage. w (!) <I :I: en ::::) :: >?: ww _.en m en 2 :: Q LIJ Q. :E en ::::) L1.l 2 :: L1.l X Q. <I :E :E <I > L1.l (!) <I :I: en ::::) :: > z LIJ w _. en lxi en :E :: w Q.!;( :E en ::::) LIJ 2 :: w X Q. <I :E 2 <I > 1,6 1,5 1,4 1,3 1,2 1,1 1, , 19, 18, 17, 16, 15, 14, 13, 12, 11, 1, 9, 8, 7,. "". ". [ L". to r._ r.. c: 15 VA 6Hz 12 VA 5 Hz r IOO VA 6H z LOAD POWER FACTOR (PERCENT) I " " l Fig. 1 6/5 Hertz 7 VA 5 Hz 5VA 6Hz 35VA 5 Hz 1. """" IOOOVA 6Hz 6, 5, ;:::: / IOOOVA 5 Hz 4, I 75VA 6Hz 5VA 5Hz I f""" 3, 5VA 6Hz r r 2, 4VA 5 Hz f 1, 3 VA 6Hz 24 VA 5Hz LOAD POWER FACTOR (PERCENT) : F1g. 2 6,5 Hertz SQUARE D tdmpany

6 9 7 PAGE 4 IIJ (!) 8 75 I J 5 > 45 d IIJ 4 Ill crf 35 Q 3 C( Ill IIJ a: IIJ 25 Q. 15 ::::t C( 1 J > au ISO,OOO 14, 13, g 12, z II, u "" 1&1 1, _. en 9, it 8, t/) 7, i 2 6, ffi 1 5, c 4, en :Jill 3. ffi 2, X 11 <:::e c( g 1 "" 1.. "" 1" r.! 1. rr 1tt REGULATION CURVES (Continued) : o [, 1 LOAD POWER FACTOR (PERCENT) "" 2VA i 15 VA LOAD POWER FACTOR (PERCENT) Fig. 4 25,3 Hertz 75VA 5 VA Fig. 3 6/5 Hertz I 2VA 6Hz 2VA 5 Hz 15 VA 6 l::iz_. 15 VA 5 Hz 1 Descriptive Sheet Page 4 January, (!) 1 15 > Ill at r 5VA 1. 9 : [ 8 7 [_ 6 t 35VA > LQAD POWER FACTOR (PERCENT) Fig. 5 25/3 Hertz www. ElectricalPartManuals ElectricalPartManuals. com com!square D tdmpany! :?:

7 Di mansion Sheet Page 1 August, 1965 CONTROL CIRCUIT TRANSFORMERS 9 7 PAGE 5 APPROXIMATE DIMENSIONS AND SHIPPING WEIGHTS FOR STANDARD VOLTAGE TRANSFORMERS A 97 TYPE E TRANSFORMERS (4) K DIA. OPEN TYPE MTG. SLOTS Weight in Pounds AT B* c D E Dimensions F G H* E o/Jz 3!4 2 % 2V.!4 311hz E2 5 3% 4Y,, 4 2% 2 % 31o/3z E3 8 3% 4Y,, 4% 2Ya o/1 3Yo y,. 3fo E4 12 4V. 5% 5% 3!4 1Y,o 3% % 41o/3z E5 18 5!4 6 4% E6 28 5!4 7% E7 Series B 33 6Ya 6% 4 1Y,o E8 48 7!4 8 5V. 1!4 5V. E9 54 7Yo 9!4 5Ya 1% 5V. i"add 1%" to d1mens1on "A" 1f AP1 fuse block used. * AP2 fuse block shown. Use dimension "C" and "L" if AP1 used. 5% 1 4% v o/1 4% v 5o/io ENCLOSED NEMA TYPE 1 Weight Dimensions Diagram 1 1n Pounds A B c D E EG1 7 4Y, 94 7Ya 3% 1 v EG2 12 EG3 15 6Y,. 111l,z 9Ya 4Y2 11Yio EG4 19 Weight Dimensions Diagram 2 in Pounds A B c D E F EG5 31 EG6 41 9!4 13!4 EG7 46 EG8 7 1!4 15% EG9 76 7o/, y,. 8o/. 7V. 13 v Above dimensions and weights also apply to Forms F2 and F3. s EG5 through EG9 have two V."%" knockouts in top and bottom and one V." knockout near top and bottom on each side. Dimensions are in inches.!soua RE D : B zy,, 1 1 F G H 1Y.o Y2% 4Yo 1 Y2% 5o/Jz Diagram 2 W:j r E J J K L.83 x 2o/, "%4 x 1,i4 X 24 2Ya 3Ylo 1)t4 X Yo y,. X YI 4% :y,, o/io X 11j,6 4% Yo y,. X YI 6!4!4 v X YI 6o/.o Yo V.o X Yio 6V. Diagram 1 CDMPA NY

8 Sheet Page 2 December, 1966 TYPE GO CONTROL CIRCUIT TRANSFORMERS STANDARD VOLTAGE TRANSFORMERS WITH FUSE BLOCK ELEVATOR KIT FOR TYPE S 8538 AND 8539 COMBINATION STARTERS Continuous VA 6 Hertz 5 Hertz Hertz 2448/ / /11 6/12 575/115 55/ /24 7 G2 12 G3 24 G4 STANDARD VOLTAGES Open 5 Hertz 2346/ /11 575/115 55/11 NONSTANDARD VOLTAGES Description $ Addition Nonstandard single primary and/or single secondary voltage rating $5. Nonstandard dual voltage primary with any single voltage secondary rating The GO transformer is designed for factory or field installation in Class 8538 and 8539 S combination starters. In Class 8538 fusible combination starters, the transformer is mounted underneath the fuse block. A fuse block elevator kit is furnished with each transformer to Class S Size APPLICATION DATA CONTROL TRANSFORMER SELECTION GUIDE Enclosure and 1 1, 4, , 4, , 4, , 4, 12 Max. A G2 5% G3 5Y, G4 5fs Form FT (Standard 5 VA transformer).... FT 11 (1 Watt Extra Capacity)... FT 12 (2 Watt Extra Capacity). FT (Standard 1 VA transformer). FT11 (1 Watt Extra Capacity). 97 PAGE U GO Mounts underneath fuse block on Class 8538 and between circuit breaker and starter on Class 8539 permit field installation. In Class 8539 devices, the transformer is mounted on end and the fuse block supports are not used. Holes are provided in the combination starter panel for mounting the GO transformer and supports where necessary.. FT 12 (2 Watt Extra Capacity)... FT (Standard 15 VA Transformer)... FT11 (1 Watt Extra Capacity) FT 12 (2 Watt Extra Capacity)... FT (Standard 15 VA Transformer). Dimensions B c D E 2Y, 5fs 2 1% 2Y, 5fs 2% 2 2Y, 5fs 2Ys 2Y, ORDERING INFORMATION REQUIRED Class,, VA rating and Voltages. E1 G3 G4 G2 G4 G4 E3 E4 E5 GFT3 GFT3 $5. The GFT3 transformer kit is designed to be used with Class 852 and 8536 S Size 3 contactors and starters in NEMA 1, 4 and 12 enclosures. The kit includes a G3 transformer, AP1 fuse block with proper fuse; necessary wiring is included and all the components are mounted on the bracket. :SQUARE DCDMPANY s subject to change without notice..;:;: SCHEDULE DS1 DISCOUNTS

9 Supplementary Page 115 April, 1969 HO APPROXIMATE DIMENSIONS f71 I., I, 2 AC TO DC SOLID STATE CONVERTER PROV. FOR " G MTG. SCREW A35438A CONNECTION DIAGRAM 9 7 PAGE 21 The HO solid state converter is a device that converts an ac input voltage to a de output voltage for de loads. It can be used with devices such as de relays, timers, contactors and starters with de control circuits, as well as other devices where energization with de is desirable. The converter will permit the use of such devices in systems employing voltage sources of 25 through 45 hertz without requiring any modification to the devices themselves. A typical application would be that of controlling lighting or power loads in areas where the magnet hum of ac devices may be objectionable, such as hospitals and schools HERTZ VOLTS MAX. AC Input DC Output Volts Volts Max. Amps H1 $ H2 26. APPLICATION DATA Ratings The converter can be used with both resistive and inductive loads within the ratings shown in the table above. If used at reduced input voltage, the output amperage must not be exceeded. Mounting The device is completely encapsulated and provided with two mounting slots for #632 screws. It can be mounted by the mounting projections provided on the housing or it can be mounted to an adaptor bracket which permits its use with the Square D terminal block mounting channel. Terminations Four color coded #16 stranded wire leads, two feet long, are provided for circuit connection. ORDERING INFORMATION REQUIRED 1For panel mounting, order by class and type number. 2For channel mounting, order converter and bracket , price $.4. All dimensions are in inches. s subject to change without notice. SQURRE D CDMPRNY SCHEDULE DS1 DISCOUNTS