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Transformer Disconnects
CONTENTS
Description
Page
Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2
Factory Installed Options . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3
NEMA 1 Transformer Disconnects . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4
NEMA 12 Transformer Disconnects . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
Wiring Diagrams . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10
Frequently Asked Questions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13
Technical Information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14
Pricing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15
Class 9070
Transformer Disconnects

CONTENTS
Description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .Page
Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3
Standard Features . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3
Factory-Installed Options . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4
Specifying Product Catalog Numbers . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
NEMA 1 Transformer Disconnects . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
NEMA 12 Transformer Disconnects . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10
Wiring Diagrams . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12
Frequently Asked Questions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15
Cross Reference to Old Part Numbers . . . . . . . . . . . . . . . . . . . . . . . . . . . 16
Technical Information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17
Catalog
April
05
Courtesy of Steven Engineering, Inc.-230 Ryan Way, South San Francisco, CA 94080-6370-Main Office: (650) 588-9200-Outside Local Area: (800) 258-9200-www.stevenengineering.com Courtesy of Steven Engineering, Inc.-230 Ryan Way, South San Francisco, CA 94080-6370-Main Office: (650) 588-9200-Outside Local Area: (800) 258-9200-www.stevenengineering.com Transformer Disconnects
Introduction
3
04/2005
� 20032005 Schneider Electric All Rights Reserved
INTRODUCTION
Schneider Electrics Square D
�
Transformer Disconnects mount inside or outside a control system enclosure and provide power
to auxiliary, single-phase loads when the main three-phase disconnect is either ON or OFF. The transformer disconnect is
normally wired to the line side of the control panel's main disconnect.
This convenient source of 120 V power can be used for auxiliary or isolated loads, such as panel lighting, portable power tools,
and programmable controller equipment.
Units consist of copper-wound transformers, a disconnect switch, and primary and secondary fuse blocks. All blocks are installed
in NEMA 1 or NEMA 12 enclosures.
STANDARD FEATURES Meets UL standardsUL Listed
Meets CSA standardscUL Listed Use Square D, type TF industrial control transformers
Rated for 50/60 Hz
Trilingual nameplate (English, Spanish, and French)
Molded terminal boards 255000 VA
Welded core and base plate
Type T transformers are designed for various temperature classes:
50150 VA with a 55� C temperature rise
200350 VA with an 80� C temperature rise
5005000 VA with a 115� C temperature rise
Separate Fingersafe� cover accessory kits may be purchased and installed
Rejection-style fuse block connected to primary
Secondary fuse block Use Square D disconnect switch:
600 Volts
45 Amperes
100,000 A, short-circuit withstand, integrated rating when protected by Class CC fuses
Disconnect can be locked in the OFF position Multiple enclosure options to choose from:
Standard NEMA 1
G1: 2501000 VA
G2: 15003000 VA
G4: 5000 VA
Mini NEMA 1
G0: 100500 VA
Compact NEMA 1
G3: 7503000 VA; designed to be installed in 12-inch deep, standard boxes
NEMA 12
A2: 2503000 VA; standard NEMA 12 option; can be factory modified for NEMA 3R applications
A3: 2502000 VA; NEMA 12 option with special disconnect switch KnockoutsConveniently located on NEMA 1 enclosures Ground terminal External mounting flanges with slotted holes for hook and hang mounting on NEMA 1 enclosures 90� access cover stop
Courtesy of Steven Engineering, Inc.-230 Ryan Way, South San Francisco, CA 94080-6370-Main Office: (650) 588-9200-Outside Local Area: (800) 258-9200-www.stevenengineering.com Transformer Disconnects
Factory-Installed Options
4
� 20032005 Schneider Electric All Rights Reserved
04/2005
FACTORY-INSTALLED OPTIONS Multiple voltage combinations
240 x 480 to 120 (Voltage Code D1)
208 to 120 (Voltage Code D3)
277 to 120 (Voltage Code D4)
600 to 120 (Voltage Code D5)
380 to 110 (Voltage Code D6)
480 to 120 (Voltage Code D9); Available on 5000 VA only
415 to 110 (Voltage Code D17)
120 to 120 (Voltage Code D24)
480/575 to 115 (Voltage Code D101); Requires special wiring 55� C rise transformers (Form C)
9070 type EO transformers
Standard on 250 VA and below Electrostatically-shielded transformers (Form E23) Additional 1-1/2-inch x 13/32-inch secondary fuse block for multiple secondary circuits (Form F11) Change standard primary fuse holder from:
1-1/2-inch x 13/32-inch to 5-inch x 13/16-inch (Form F30)
5-inch x 13/16-inch to 1-1/2-inch x 13/32-inch (Form F32) Enclosure door grounded with wire lead (Form GRD) Duplex receptacle; door-mounted
One receptacle (Form G13)
One Class A, ground fault-protected (GFI) receptacle (Form G14)
Two receptacles (Form G16) Convert enclosure from NEMA 12 to NEMA 3R (Form N3) Pilot lightON red warning light to tell operator that 120 VAC power is ON (Form P1); Option with strain relief (Form P2)
Courtesy of Steven Engineering, Inc.-230 Ryan Way, South San Francisco, CA 94080-6370-Main Office: (650) 588-9200-Outside Local Area: (800) 258-9200-www.stevenengineering.com Transformer Disconnects
Specifying Product Catalog Numbers
5
04/2005
� 20032005 Schneider Electric All Rights Reserved
SPECIFYING PRODUCT CATALOG NUMBERS
When ordering, specify the following information: Class, Type, VA rating, Enclosure, Voltage code, and
Form(s).
Forms are added after the voltage code in alphabetical order:
Sample Catalog Number
Class
Type
VA Rating
Enclosure
Voltage Code
Form(s)
9070
SK
1000
A2
D1
E23
G13
N3
For example, to order a 1000 VA, A2 enclosure with the following options:
Use this catalog number:
Electrostatically-shielded, duplex receptacle, NEMA 3R
9070SK1000A2D1E23G13N3
Courtesy of Steven Engineering, Inc.-230 Ryan Way, South San Francisco, CA 94080-6370-Main Office: (650) 588-9200-Outside Local Area: (800) 258-9200-www.stevenengineering.com 6
� 20032005 Schneider Electric All Rights Reserved
04/2005
Transformer Disconnects
NEMA 1 Transformer Disconnects
NEMA 1 TRANSFORMER DISCONNECTS
Standard NEMA 1 Offering (G1 and G2) Voltage 240 x 480 to 120 (D1) 2503000 VA
Square D
�
disconnect switch (V3) 45 A, 600 V, 100,000 AIC rating when protected with
Class CC fuses Fuse block requires:
1-1/2-inch x 13/32-inch rejection-style primary fuses
1-1/2-inch x 13/32-inch secondary fuses Ground terminal Conveniently located 1/2-inch to 3/4-inch knockouts External mounting flanges with slotted holes for hook and hang mounting 90� access cover stop
Table 1:
Enclosure Dimensions
VA
Enclosure
A
B
C
D
E
F
G
H
I
J
2501000
G1
10.80
1.70
6.00
11.80
9.40
8.96
16.81
2.09
.32
.32
15003000
G2
13.80
1.70
10.00
14.80
13.40
12.21
23.06
2.09
1.00
1.00
Table 2:
Factory Available Options for Standard 9070 SK Units (Enclosures G1 and G2)
OptionDescription
Factory Modification Form
Special voltages
Change voltage code from D1 to appropriate D code
55� C rise transformer
C **
Electrostatically-shielded transformer
E23
Additional 1-1/2-inch x 13/32-inch secondary fuse block
F11
Primary fuse block5-inch x 13/16-inch *
F30
Duplex receptacle, door-mounted
G13
Class A, GFI, duplex receptacle, door-mounted
G14
Two duplex receptacles, door-mounted *
G16
ON red warning pilot light
P1
ON red warning pilot light, with strain relief
P2
* Available on G2 enclosures only. If required on 2501000 VA, change G1 to G2 in catalog number
** Not available on 3000 VA
G1
G2
1/2-3/4-inch
Knockouts
1/23/4-inch Conduit
E
F
H
J
90 G
C
B
A
D
I
ON
OFF
Courtesy of Steven Engineering, Inc.-230 Ryan Way, South San Francisco, CA 94080-6370-Main Office: (650) 588-9200-Outside Local Area: (800) 258-9200-www.stevenengineering.com Transformer Disconnects
NEMA 1 Transformer Disconnects
7
04/2005
� 20032005 Schneider Electric All Rights Reserved
Standard NEMA 1 Offering (G4) Voltage 480 to 120 (D9) 5000 VA
Square D
�
disconnect switch (V3) 45 A, 600 V, 100,000 AIC rating when protected with
Class CC fuses Fuse block requires:
1-1/2-inch x 13/32 rejection-style primary fuses
3-inch x 3/4-inch secondary fuses Ground terminal Conveniently located 1/2-inch to 3/4-inch knockouts External mounting flanges with slotted holes for hook and hang mounting 90� access cover stop 60 Hz only
Table 3:
Factory A