American Magnetics 601 User Manual

American Magnetics, Inc.

P.O. Box 2509, 112 Flint Road, Oak Ridge, TN 37831-2509

Phone: [phone] Fax: [phone]

Internet: http://www.americanmagnetics.com
E-Mail: [e-mail]

AMI MODEL 601 ENERGY ABSORBER

INSTALLATION, OPERATION, AND

MAINTENANCE INSTRUCTIONS

I. INTRODUCTION

The AMI Model 601 Energy Absorber is designed to provide a compact, f ast-rampdown
option of up to 5 VDC fo r A M I power supply system s . T h e Mo de l 60 1 i s de si gn e d to
operate safely in the event of loss of facility AC power by drawing the necessary power
for internal cooling from the superconducting magnet. Upon loss of AC power to a
power supply system, the Model 601 will ramp the system to zero current at a
discharge rate of approximately 5 VDC.

AMI

II. SPECIFICATIONS @ 25°C

AC Input Ratings:. . . . . . . . . . . . . . . . . . . . . . . . . . . 100 to 240 VAC ± 10%, 50/60 Hz,

100 VA max

DC Input Ratings:. . . . . . . . . . . . . . . . . . . . . . . . . . . 5 VDC ± 5%, 4 A max

Maximum Magnet Operating Current: . . . . . . . . . . 130 A @ 25

100 A @ 40

Nominal Disch a rge V oltage:. . . . . . . . . . . . . . . . . . . 5.0 VDC ± 2%

Discharge Voltage Temperature Coefficient: . . . . . ± 150 ppm/

Internal Series Resistance:

Rated Operating Temperature: . . . . . . . . . . . . . . . . 0 to 40

Rated Operating Relative Humidity:. . . . . . . . . . . . 0 to 95% non-condensing

Torque Lim i t on C u rr ent Terminals:. . . . . . . . . . . . 50 in -l b s.

1

. . . . . . . . . . . . . . . . . . . 2 mΩ ± 1 mΩ

0 to 25

°C, derated linearly to
°C

°C max

°C @ 100 A,
°C @ 130 A

1

(nominally adds 200 mV voltage drop at 100 A)

Instruction manual symbol: the product is marked with this symbol when it
is necessary for you to refer to the instruction manual in order to protect
against damage to the product or personal injury .

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Rev. 5, July 2003

AMI

III. INSTALLATION

The AMI Model 601 is designed to operate in an AMI power supply system consisting
of a unipolar powe r su pply, a power supply pro gr a mmer, and a supercon d uc t i n g
magnet. The following paragraphs document the proce dures and interconnects
necessary to use the Model 601.

WARNING

the protection provided by the equipment may be impaired.

A. Carefully remove the Model 601 from t he shipping conta iner and remove all packaging

material.

NOTE

and contact the shipping representative to a file a damage claim. Do not
return the instrumen t t o AMI unless prior authorization has been
received.

B. If the Model 601 is to be mounted in a rack:

Install the Model 601 in a 19" wide instrument rack by securing the front panel to
the rail in each of the four corners with mounting har dware supplied by the cabi net
manufacturer.

C. Install the Model 601 in a magnet power supply system by completing the following

steps:

CAUTION

601 (maximum torque is 50 in-lbs). Overtightening can result in
damage to the terminals.

: If the Model 601 is use d in a manner no t speci fied by AMI,

: If there is any shipping damage, save all packaging material

: Do not overtighten the n uts on the curre nt lugs of the Mode l

1. Connect a power lead cable from the power supply positive (+) out put lug to the

positive (+) lug on the rear of the Model 601. No other connections should be made
to the Model 601 positive (+) lug.

2. Connect a power lead cable to the negative (

the positive (+) current lead of the supe rconducting magnet. No other connections
should be made to the Model 601 negative (

WARNING

magnet. Metallic objects shorted across the lugs may conduct large DC
currents which are capable of melting the object and causing severe
burns.

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EXCELLENCE IN MAGNETICS AND CRYOGENICS

: Exercise care near the power lugs when operating a

−) lug on the rear of the Model 601 to

−) lug.

AMI

CAUTION: Current flow should be from the positive (+) to negative (−)
lug of the Model 601. If this is reversed, severe damage of the Model 601
will result.

NOTE

: If an AMI Model 420 Power Supply Programmer is to be used

with the system , re fe r to th e a ppropriate installation section in th e
Model 420 Power Supply Programmer manual for a complete system
diagram and step-by-step instructions for all the system interconnects.

D. If you have purchased multiple Model 601 units with the Parallel Operation Option,

then up to five Model 601 units may be operated in parallel with a total current rating
of 90% of the sum of the ratings for each individual unit .

Typically, if multiple Model 601 units are to be connect ed, the positive (+ ) and negative
(

−) lugs will be ganged together as illustrated below using a conductive plate. Simply

follow the installation directions in Step C above by treating each ganged lug as a
single output lug. The power leads, from the supply and to the magnet, may be
connected to any mounting lug if an additional lug is not provided in the ganged
conductive plate.

Ganged positive lugs

Coaxial interconnect
for parallel operation

Ganged negative lugs

In addition to the ganged lugs, the coaxial connectors on the rear of each Model 601
must also be connected. If more than two units are connected in parallel, the middle
units may be connected to the coaxial cable by using standard BNC “T” adaptors. The
“end” units should be connected directly to the coaxial cable — no BNC “terminators”
should be used.

E. Supply power to the Model 601 by connecting the suppl ied external DC power

converter to the matching connector at the rear of the Model 601, and then connecting
the AC power cord to the appropriate power receptacle. The Model 601 is operational
immediately upon connection to a power receptacle.

WARNING

: Do not position the external power supply or the Model 601

so that it is difficult to disconnect the power cords.

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EXCELLENCE IN MAGNETICS AND CRYOGENICS