Schneider Electric 9070 manual Frequently Asked Questions, Question Answer

Industrial Control Transformers

Frequently Asked Questions

FREQUENTLY ASKED QUESTIONS

Question	Answer
	When A Multitap Unit Might Be For You:
	1. Transformer will be installed in a device whose source voltage is unknown at time of shipment
	2. Space is not critical (MultiTaps are larger than standard units)
	3. You sell to markets with multiple source voltages
Should you consolidate your control	4. Reduced number of parts will offset premium for MultiTap units
transformer to a MultiTap or Universal	When A MultiTap Unit Might Not Be Beneficial
Control Transformer?	1. High percentage of your business is 240 x 480 source voltage
	2. Space is an issue
	3. Source voltage is always known at time of shipment
	4. Source voltage changes other components in the control circuit
	5. Premium for MultiTap does not get offset by having fewer parts
	No, they cannot. Industrial control transformers terminals are specifically marked “primary” and ”secondary”. As such,
Can a 9070 type T or TF control transformer	the National Electrical Code (NEC) and Underwriters Laboratories (UL) prohibit connecting the source to other than
be used in a back (reverse) feed application	the primary terminals. Also, since industrial control transformers utilize compensated windings to accomodate the high
as a step-up transformer?	regulation inherent in such small transformers, the resulting voltage ratio would be lower than desired. In other words,
	if a control transformer were reverse fed, the output voltage would be lower than desired.
Does Schneider Electric provide fuses for the	While the 9070 Type TF industrial control transformer comes with a three-pole fuse block (two rejection type Class CC
primary and the secondary of a 9070 Type TF	fuses for the primary, and one non-rejection type midget fuse for the secondary), Schneider Electric does not provide
	the fuses. Proper fuse selection is the installer’s responsibility and is dictated by NEC table 450-3(b) and any specific
industrial control transformer?	application parameters that exist with any industrial control transformer installation.
My 9070 Type T or TF industrial control	The nameplate of your Schneider Electric 9070 Type T or TF industrial control transformer clearly marks out that the
transformer has four terminals on both the
	outside terminals of each side are used for the customer installed wire connections. Schneider Electric makes a
primary and secondary, but only markings on
the wiring diagram of H1and H2 on the	standard four- or six-terminal block for various transformer designs for commercial cost effectiveness. With only two
	terminals being used, it is standard practice for it to always be the outside terminals. Several different transformer
primary and X1 and X2 on the secondary.
	voltage and wiring arrangements are shown in this catalog.
Which terminal do I use?
How do the 9070-FB3A, 9070-FB2A, and	When factory installed on a 9070 Type TF control transformer, they mount on the center of the core on factory
9070-FB-1A fuse blocks mount on a 9070	installed studs. When field installed by the customer on a 9070 Type T control transformer, they mount over one of the
Type T control transformer when factory	terminal strips using hardware supplied with the fuse block kit. (There are no studs on the 9070 Type T, only on the
installed? When field installed?	Type TF.)
Does Schneider Electric offer epoxy	Schneider Electric does not offer epoxy encapsulated industrial control transformers. The 9070 Type T and TF
encapsulated versions of its 9070 Type T and	industrial control transformer is the premier offering in the industry and is suitable for virtually any installation
TF control power transformers?	appropriate for a CPT.
What is the sound level for a 9070 Type T	Sound levels for general purpose and control transformers are per NEMA ST-20 sound levels. For Type T control
control transformer?	transformers, this level is 40dB maximum.
Are replacement jumper kits offered for	Yes. Replacement jumper kits contain two jumpers per kit and must be ordered in minimum quantities of 50 kits.
	Use kit number 30033-027-53 for Accessory Key I (25–200 VA) and Accessory Key II (25–150 VA).
Schneider Electric’s 9070 Type T and TF
	Use kit number 30033-027-54 for Accessory Key I (250–5000 VA), Accessory Key II (200–3000 VA), and Accessory
industrial control transformers?
	Key III ( 25–3000 VA).
Do 9070 industrial control transformers	Schneider Electric 9070 Type T and TF industrial control transformers do not contain any material that would require
contain any materials, such as PCBs, lead, or
other heavy metals, that would require	any special disposal means and can be disposed of in the normal manner. Since the majority of the transformer is built
	of recyclable material (steel, copper, etc.), Schneider Electric urges the customer to recycle the unit if possible.
special disposal means
	A triple rating on the control transformer`s voltage code basically means that the transformer is designed to
	successfully operate at voltages slightly different than the nominal voltage at its full VA capacity. This is done to allow
	for different voltage systems that require the same voltage ratios, say 4:1 or 2:1.
What does a “triple rating” mean in terms of	Example: The 9070T250D1 is a triple rated voltage code unit that can supply 250VA with the following input voltages
an industrial control transformers voltage	and the corresponding output:
code?	Input: 240 or 480	Output: 120
	Input: 230 or 460	Output: 115
	Input: 220 or 440	Output: 110
What is the maximum fuse ampere rating that	The maximum ampere rating of the fuse blocks and fuse clips offered by Schneider Electric for the 9070 Type T
can be used in a factory or field installed fuse	control transformers is 30 amps. If higher fuse ratings are required, then the customer will have to provide the
block or fuse clip for a 9070 Type T control	supplementary fuse holder provisions.
transformer?
On a 9070 Type T or TF industrial control	The capabilities of the various 9070 Type T and TF tranformers vary widely. Some units can only have one voltage out
	with a given voltage in. Others can have more than one. Contact your Schneider Electric representative for
transformer with more than one secondary
	assistance.
voltage available, can more than one
	If a satisfactory model is not available, Schneider Electric has the capability of building virtually any industrial control
secondary voltage be utilized or only one?
	transformer a customer may need.

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