Teal PDF
Teal PDF
Teal PDF
TABLE OF CONTENTS
SPECIFICATIONS ...........................................................................................................ii
1- SAFETY ......................................................................................................................1
2 - PRODUCT DESCRIPTION.........................................................................................2
2-1 Product ................................................................................................................................................... 2
2-2 Grounding .............................................................................................................................................. 2
2-3 Additional Features ................................................................................................................................ 3
3- PHYSICAL INSTALLATION .......................................................................................3
3-1 Unpacking .............................................................................................................................................. 3
3-2 Shipping Brackets .................................................................................................................................. 3
3-3 Mounting ................................................................................................................................................ 4
4- CONNECTIONS ..........................................................................................................4
4-1 Line ........................................................................................................................................................ 4
4-2 Load ....................................................................................................................................................... 5
4-3 Voltage Adjustment................................................................................................................................ 5
4-4 ABB Option ............................................................................................................................................ 6
5- MAINTENANCE ..........................................................................................................7
5-1 Surge Suppression ................................................................................................................................ 7
6- REVISION HISTORY ...................................................................................................7
7- DRAWINGS
Dimension Diagram
Component Location
Schematic
Appendix A
Appendix B
Appendix C
Appendix D
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SPECIFICATIONS
COMMON ALL MODEL NUMBERS
SPECIFICATIONS
Input Voltage 200/208/240/380/400/416/440/480/500 VAC DELTA
Surge Withstand Will withstand and protect against worst case power line surges as defined by
ANSI/IEEE C62.41 Categories A and B up to 6000V, 3000A capability ringwave and
impulse waveform.
Spike Protection With Category A ringwave applied to input either normal mode or common mode,
output transient will be less than 50V H-N and 0.5V N-G.
Construction Materials All transformer wires are insulated with Haptz Class H materials. Windings are
insulated with a Nomex paper insulation system before vacuum varnishing. Internal
wiring is minimum 200 degree C rated and sleeved with Class H material. A grain-
oriented silicon iron core with 14-mil laminations interleaved 1-1 is used to minimize
eddy currents and to keep external magnetic fields below 0.1 oersted (measured at 12
inches from unit in any direction).
Transfer Impedance
60 Hz (L-L) .1 Ω .1 Ω
Load Regulation
(0-Peak% Load) < 3.026% < 3.026%
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1- SAFETY
Even when an EPO/EMO switch is present, this does not guarantee that the power has
been cut off coming into the unit. Units are heavy, ensure adequate lifting capacity is
used. To avoid tipping over, do not tip beyond 10° from vertical and avoid abrupt
movements.
2 - PRODUCT DESCRIPTION
2-1 Product
• A very well insulated, well shielded, low impedance isolation transformer. This
provides protection against “common mode” noise and spikes (neutral-ground
potentials). The system can withstand and protect against impulses up to 6000
volts. It can also provide the inrush and peak currents required by disk drives and
modern switch mode power supplies in today’s computer systems.
• A low pass power filter with an exceptional ability to suppress “normal mode” noise
(fast line-neutral voltage spikes and dips).
• A surge suppressor, which shunts large impulses to ground. While the isolation
transformer and low pass filter handle virtually all disturbances, this surge
suppressor’s function is to reduce unusually large voltage spikes to levels that are
harmless to electronic equipment.
• An output contactor that can be controlled by a remote ON/OFF switch.
This Isotran Plus removes noise and spikes from the AC power line. It is installed
between the source of power (such as a wall outlet) and the equipment that needs
protection from power lines disturbances.
Clean power enhances the reliability and mean time between failure of computers and
other sensitive electronic equipment. Depending upon the type of system being
protected, cleaner power can for example, enhance testing sensitivity, testing yields, or
image quality.
2-2 Grounding
Good grounding and ground bonding are critical to the reliable operation of electronic
systems as well as personnel safety. The following directions should be followed only in
as far as they are consistent with all local and national electrical codes. Grounding can
often be confusing and difficult. Contact TEAL Electronics at 858-558-9000 if you wish
more specific advice.
This Isotran Plus includes an isolation transformer that can significantly improve the
quality of system grounding. By re-referencing the phase conductors to ground, it
eliminates incoming line-side "common mode" noise (and complies with Article 250-5 of
the NEC). The output neutral (if present) is bonded to ground.
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minimum input grounds can then be used. Verify input grounding meets codes prior to
installation.
If the system has non-isolated communications lines from other devices not
powered by the Isotran Plus, the system is then less isolated and incoming ground
quality becomes more important. The communications line becomes a "back door"
through which power and grounding problems can disrupt or damage the system. Good
grounding of devices on both ends of the line helps minimize potential problems, as
would surge suppressors on the communications line or an Isotran Plus on the device
on the other end. Surge suppressors on the device, however, hurt much more than they
help. Isolation of the communications line (optical or magnetic) eliminates this problem
altogether.
Local Grounding Bond: Article 250-30 of the National Electric Code (NEC) requires
that hard wired power conditioners (including the Isotran Plus) be bonded to nearest
available local building grounding electrode as well as the equipment ground. The
required local ground bond points are:
a. Building Steel, or
b. Grounded metal water pipe if building steel is not available, or
c. Other types of electrodes per NEC 250-50 and 250-52 if building steel or
grounded metal water pipe is not available.
This also helps reduce electrical noise issues by referencing the system to local ground
potential in case parts of the system might be touching grounded parts.
Isolated output grounding: Except at the single local ground point at the Isotran Plus,
it is important that the output ground from the Isotran Plus be kept isolated from building
ground in any output wiring. If receptacles are hard wired to the Isotran Plus in the field,
isolated ground receptacles must be used. These special receptacles avoid re-
connecting the output ground to the conduit, and because they look different they
reduce the chance of non-critical loads being inadvertently plugged into the Isotran Plus
power.
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A customer supplied momentary ON switch with a normally closed OFF switch must be
installed at TB7, if not installed at the factory, for proper operation of the system.
A customer supplied, normally open external EPO switch may be installed at the EPO
terminal block (TB5) at terminals 1 and 2. (Refer to Schematic).
3- PHYSICAL INSTALLATION
3-1 Unpacking
• Ensure levelers are raised to avoid damage when moving off pallet.
• Protect finish, light, extended handles and buttons from damage while uncrating and
placement.
• If forklift is used, lift only by frame, avoiding damage to sheet metal covers. Avoid
casters with forks. If there is a removable door remove it while uncrating and during
placement to avoid damage to hinges and latches.
Please retain packing materials until the unit is satisfactorily install and accepted.
Damage in transit is always possible. Visible external damage should be noted on the
bill of lading upon receipt and a claim filed with the shipper. Concealed damage can
also be claimed with the shipper within 15 days. Contact TEAL if you wish assistance in
filing your claim.
Each unit is inspected and tested before it leaves the factory. An individual check-out
sheet is maintained on file by TEAL and retrievable by power size and serial number.
Items tested include voltages input/output, current, and spike attenuation both normal
and common mode.
The shipping brackets used with this unit were designed to be utilized when mounting
the unit to the floor. Refer to Seismic Calculation section (Section 4) for more
information.
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3-3 Mounting
Refer to the attached mechanical drawing for dimensional information. The unit should
be mounted in a dry location. Conduit entrance may be through the rear of the unit.
If the unit is mounted on a raised floor (such as a computer room floor) provisions must
be made to support the weight of the unit
Because the TEAL Isotran Plus is designed to operate at a high efficiency, a minimum
amount of ventilation is required for proper operation. However, one should not block
the vents at the top of the unit and always allow at least one inch around the unit for
natural convection to take place.
4- CONNECTIONS
Check the labels on the Isotran Plus to make sure that the input and output voltages and
currents match the system’s requirements. If there are any questions, please call TEAL
or your local representative.
4-1 Line
The Isotran Plus is connected through terminal blocks and receptacles. Input
connections are made to the Input terminal blocks and the Output connections are
made to terminal blocks and 5-20R receptacles. The terminal blocks are compression
type, so no special hardware is required. Check to make sure that all leads and
connections are well insulated. Recheck the tightness of all lugs, as a loose connection
may damage the unit and/or the load.
This unit has multiple input voltages that can be changed in the field. There will be a
tag attached to the input circuit breaker specifying which input voltage tap has been
selected at the factory. Check the voltage present to determine if it is correctly set. If
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not, refer to the “Voltage Adjustment “ Section 4-3 and drawing “Voltage Selection” for
instructions.
4-2 Load
Once voltage has been applied to the Isotran Plus, without a load connected, turn on the
main input circuit breaker switch. There should be a soft hum and the switch should
stay on. Energize the 277/480V output by pushing the customer supplied momentary-
ON start switch (Refer to Schematic). Using a voltmeter, check the output for proper
voltage. With no load, these voltages will often be a few percent higher than the input
voltage (e.g. 123V for nominal 120V circuit). This is to compensate for circuit losses
when the load is connected.
This unit is equipped with voltage adjustment taps to compensate for different voltages in
different areas. Only qualified personnel may do this adjustment as it involves a high
voltage electrical connection. Failure to make this adjustment will result in the wrong
output voltage from the Isotran Plus that could potentially harm the load.
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In April 2010 TEAL attempted to change the tap change wiring in the PDU.
Unfortunately, the actual wiring was not changed, but the wiring diagram in the manual
was. As the above table shows, Case II PDUs shipped between April 1010 and
October 2010, s/n range 122315 through 124521, have a mismatch with their manuals.
Trying to change taps on a PDU wired up per the photo in appendix A with the wiring
diagrams in appendix D will result in the PDU tripping its input breaker. There is no
hazard involved, just the PDU will not work.
The serial number data is thought to be 99% accurate. As there may be a serial
number or two outside the above range, inspection is needed.
The wiring difference between Appendix A and Appendix C is easily determined with
one observation. Look at the left most transformer coil. Find wire 0013 coming down
from the input circuit breaker. If wire 0013 terminates at the second tap from the left at
the top of the coil, the wiring matches Appendix A. This is the proper configuration for
units below serial number 124521 and below.
The proper termination tap for Appendix C (serial numbers 124522 and above) is to the
right most tap at the top of the left most coil.
Step-By-Step Checklist
• Retap the main transformer to the required voltage.
• Re-configure the input circuit breaker (if necessary).
• Retap the control transformer to the correct voltage.
When changing input voltage it may also be necessary to change the circuit breaker
current rating switches (refer to Schematic). To change the circuit breaker switches,
remove the circuit breaker panel. Open the plastic cover located at the bottom of the
circuit breaker to access switches. Reverse the preceding steps replacing circuit
breaker panel.
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Fram e
Current rating Instantaneous threshold
Tripping threshold value control switches (I3),
control switches (S/I)
(I1)
t2 switches
Tim e-current
curve control
switch (t1) Tm ax
Three dip-switches on the circuit breaker panel control the input voltage overload
setting, the overload delay, and the short-circuit trip adjustment. Factory settings for the
three switches are:
• I1 - set based on the input voltage. Refer to the Schematic for a table of the other I1
settings.
• t1 - longest delay (set to 12s)
• I/S – longest delay (set to I position)
• t2 – All three dip switches in down position
• I3 – All four dip switches in up position
Use a small blade screwdriver to move the dip switch toggles to the appropriate
settings.
5- MAINTENANCE
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The surge suppressors are equipped with indicator flag on the front of the unit to
indicate that the suppressor modules are operational for the 277/480V output. If the red
indicator flag is visible, the surge suppressor is not operational.
To replace any of the (3) surge suppressor modules on the front of unit, proceed as
follows:
1. Turn off the input circuit breaker.
2. Remove suppressor module.
3. Replace module with module of the same type, size, and rating.
4. Turn on the input circuit breaker. All circuits should operate properly.
No other maintenance is required other than periodically (i.e. every 6 months) all
electrical connections should be checked for tightness. Any accumulations of dust or
debris should be removed to keep ventilation working for convection cooling.
6- REVISION HISTORY
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Revision A6 Added more voltage selection information to
help field installers choose the right voltage
selection page
Approved By: D. Bilak Date: 10-26-10
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Wire number 0013