DynAmp LKP Series Setup guide

DynAmp, LLC
3735 Gantz Road Phone [phone] www.dynamp.com
Grove City, Ohio 43123 USA Fax [phone] [email protected]
MODEL LKP SERIES (4 CHANNEL) OEM
DIRECT CURRENT METERING SYSTEMS
Installation, Operation and Service Manual
Manual Item No. 041593
Rev. O

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DYNAMP, LLC WARRANTY
Items and components manufactured by DynAmp, LLC for permanent installation are
warranted to be free from defects in material and workmanship for a period of two (2) years
from the date of shipment.
Items and components manufactured by DynAmp, LLC for portable and temporary use in more
than one location are warranted to be free from defects in material and workmanship for a
period of eighteen (18) months from the date of shipment.
Extended warranties may be available for purchase for some products. Extended warranties
are provided on a serial number by serial number basis as noted on DynAmp’s original invoice
and/or packing list.
Items and components not manufactured and resold by DynAmp, LLC are warranted by their
manufacturer.
Warranty repair shall be, at DynAmp’s option, in the form of repair or replacement of the
defective items or components. Concerning warranty repairs, DynAmp, LLC will be
responsible for DynAmp provided time, material and transportation costs (shipping or travel).
Actual method of warranty repair / correction will be determined by DynAmp, LLC at DynAmp’s
sole option. Such warranty repair shall constitute a fulfillment of all DynAmp, LLC liabilities in
respect to said items and components. In no event shall DynAmp, LLC be liable for
consequential damages.
Information in this document is subject to change without notice.
© 1997, 1998. 1999, 2000, 2001, 2002, 2003, 2004, 2006, 2008, 2010, 2012, 2016, 2019 DynAmp,
LLC. All rights reserved.
Reproduction in any manner whatsoever for purposes other than installation, operation or service by the
purchaser or end user without the written permission of DynAmp, LLC is strictly forbidden.
This manual is part of the complete set of product documentation that includes installation, operation and
service instructions, drawings and test results . Users should evaluate the information in the context of
the complete set of product documentation and their particular application. DynAmp, LLC assumes no
liability for any incidental, indirect, or consequential damages arising from the use of this documentation.
While all information presented is believed to be reliable and in accordance with accepted engineering
practices, DynAmp, LLC makes no warranties as to the completeness of the information.
All trademarks used in association with LKP are trademarks of DynAmp, LLC.

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TABLE OF CONTENTS
Paragraph Title Page
DYNAMP, LLC WARRANTY________________________________________________________ III
TABLE OF CONTENTS_____________________________________________________________V
HAZARD WARNING! _____________________________________________________________VII
SAFETY________________________________________________________________________ IX
DYNAMP, LLC CUSTOMER SUPPORT & SERVICE ASSISTANCE ________________________ XI
MANUAL REVISIONS____________________________________________________________ XIII
1. HANDLING AND STORAGE....................................................................................................... 1
2. PRODUCT DESCRIPTION.......................................................................................................... 3
2.1 SYSTEM OVERVIEW _____________________________________________________3
2.2 ADDITIONAL MEASURING HEAD DETAIL ____________________________________3
2.3 ADDITIONAL METERING UNIT DETAIL_______________________________________3
2.4 INTERCONNECTION CABLE DETAIL ________________________________________3
2.5 ELECTRICAL____________________________________________________________4
3. SPECIFICATIONS....................................................................................................................... 5
4. INSTALLATION........................................................................................................................... 7
4.1 HANDLING PRECAUTIONS ________________________________________________7
4.2 MAGNETIC CONSIDERATIONS: MEASURING HEAD ___________________________7
4.3 MEASURING HEAD INSTALLATION _________________________________________9
4.4 INSTALLATION CONSIDERATIONS ________________________________________10
4.5 INSTALLATION PRECAUTIONS (LIVE BUS)__________________________________12
4.6 COMPLETING THE MEASURING HEAD INSTALLATION________________________12
4.7 METERING UNIT INSTALLATION __________________________________________14
4.8 METERING UNIT WIRING_________________________________________________14
4.9 INITIAL SYSTEM CHECKOUT _____________________________________________15
4.10 MAGNETIC CENTERING _________________________________________________17
5. THEORY OF OPERATION........................................................................................................ 19
5.1 GENERAL _____________________________________________________________19
5.2 MAGNETIC SENSOR (NULL DETECTOR)____________________________________19
5.3 MEASURING HEAD______________________________________________________19
5.4 METERING UNIT________________________________________________________20
5.5 POWER SUPPLIES______________________________________________________20
5.6 SYNC, PLL, AND RAMPS _________________________________________________20
5.7 ERROR AMPLIFIERS ____________________________________________________20
5.8 COMPARATORS AND PULSE GENERATOR _________________________________20
5.9 PULSE TRANSFORMER DRIVERS _________________________________________21
5.10 OUTPUT CIRCUIT_______________________________________________________21
5.11 ACCURACY DIAGNOSTICS (OPTIONAL) ____________________________________21

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6. MAINTENANCE & SPARE PARTS...........................................................................................25
6.1 PERIODIC MAINTENANCE _______________________________________________ 25
6.2 ANNUAL MAINTENANCE ________________________________________________ 25
6.3 RECOMMENDED CALIBRATION VERIFICATION INTERVALS___________________ 26
6.4 SPARE PARTS ORDERS - ROUTINE OR EMERGENCY _______________________ 27
6.5 RECOMMENDED SPARE PARTS__________________________________________ 27
7. TECHNICAL BULLETINS..........................................................................................................29
8. DRAWINGS...............................................................................................................................31
FIGURES, FORMS & TABLES _______________________________________________________
Figure # Title.................................................................................................................................Page
Figure 4.1 General Guidelines for Locating Measuring Heads.............................................................8
Figure 4.2 Window Insulation Description Typical for LKP-15 and LKP-30 Measuring Heads.............9
Figure 4.3 Measuring Head Orientation.............................................................................................16
Figure 4.4 Magnetic Centering...........................................................................................................17
Figure 5.1 Magnetic Null Detector Diagram .......................................................................................19
Table 3.1 LKP Series 4 Channel OEM Specifications..........................................................................5
Table 3.2 Typical Error At Zero Bus Current........................................................................................6
Table 4.1 Measuring Head Resistance Chart: LKP-6 & LKP-12........................................................13
Table 4.2 Measuring Head Resistance Chart: LKP-15 & LKP-30......................................................13
Table 4.3 Form For Recording Channel Voltage Measurements........................................................18
Table 6.1 Spare Parts List *...............................................................................................................27
Table 7.1 Technical Bulletin List ........................................................................................................29
Table 8.1 Drawing List.......................................................................................................................31

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HAZARD WARNING!
Symbol Identification:
General definitions of safety symbols used on equipment and manual.
Caution/Warning: Refer to accompanying documents for instructions.
GENERAL
All installation, maintenance and service must be performed by qualified
technicians who are familiar with the warnings and instructions of this manual.
Disconnect power to the system before servicing or replacing fuses.
Use of the equipment in a manner not specified by the manufacturer can impair
the protection provided within.
DynAmp does not assume liability for the customer’s failure to comply with the
rules and requirements provided in this manual.
HAZARDOUS
VOLTAGE
This equipment is designed to be connected to hazardous electric voltages.
Ignoring the installation precautions and warnings can result in severe personal
injury or equipment damage.
To avoid the risk of electrical shock or fire, the safety instructions and guidelines
in this manual must be followed. The electrical specifications must not be
exceeded and the unit must be installed according to directions provided.
This equipment is intended for indoor use only. It should be mounted in a well-
ventilated area, away from high heat, dust, and corrosive atmosphere. The
ambient temperature must not exceed the specified limits.
For mounting considerations that fall outside the recommended specifications
provided in this manual, the factory should be contacted for approval.
This unit is rated for installation category III and pollution degree 2.
INSTALLATION

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SAFETY
This equipment is designed to be connected to hazardous electric voltages. Ignoring the
installation precautions and warnings can result in severe personal injury or equipment
damage. Also, the equipment is heavy and requires special handling procedures to ensure
the safety of both personnel and equipment itself. The following are general guidelines that
should be followed when installing, operation and servicing the Metering Unit and Measuring
Head.
•All installation, maintenance and service must be performed by qualified technicians who
are familiar with the warnings and instructions of this manual.
•Always follow all local and plant safety procedures.
•Service must be performed by qualified technicians only. If use of an oscilloscope
becomes necessary during servicing, the scope must be floating and not grounded. The
Metering Unit is isolated from the mains via the power transformers. If a grounded scope
is used, a hazardous condition is created since current will flow through the probe to
ground.
•Units are not intrinsically safe. Do not place in explosive atmospheres
•Do not place in the rain, or under water, or submerge any part of the Measuring Head or
Metering Unit. The Measuring Heads are splash proof but are not waterproof.
•The surface on which the Measuring Head is mounted must be sound and capable of
supporting the Measuring Head. Fasteners used must be capable of supporting the
weight of the Measuring Head.
•Make sure that the cables are disconnected from the Measuring Head during
installation.
•The Measuring Heads are supplied with connector covers, which must be used
whenever the Measuring Head cables are disconnected from the Measuring Head. The
covers are necessary to prevent dust and water from entering the Measuring Heads. The
covers also prevent fingers from contacting the connector pins during installation, which
can carry hazardous voltages if the Measuring Head is installed on a live bus.
•If the installation is to be made on a "live" bus, the Measuring Head cables must be
disconnected from the Measuring Head. A condition hazardous to the Measuring Head
and any person handling un-insulated cable-lead terminals will result if metal parts of the
Measuring Head contact the bus, or sudden changes in the bus current occur. Personal
protective gear should be worn when reconnecting cable back to Measuring Head.
Please refer to “Installation Considerations” section 4.4 for Measuring head
storage on a live bus.
•Measuring Head should be electrically isolated from the bus bars. A ¼” (6mm) minimum
distance between the bus and window insulation should be maintained. This will insure
electrical isolation of the Measuring Head structure from the bus. The Measuring Head
itself is grounded via the cables to the Metering Unit. Refer to the “Installation
Considerations” section of the manual for more details.
•An external circuit breaker or fuse with proper rating is required for branch circuit
protection when wiring the main circuit to this Metering Unit. Each Metering Unit must
have its own breaker. Use a wire and breaker or fuse (time-delay) sized adequately for
the maximum burden of 20 VA/kA of measured current. The wire should have an
insulation rating of 600Vac and 80°C minimum temperature rating.

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•Replace fuses with correct type, size and value. All channel fuses are Type MDA time
delay fuses 3AB style, 1/4” x 1-1/4” (6.3mm x 32mm). Refer to the servicing instructions
or spare parts list for more information on replacement fuses. Do not bypass the fuses
or modify the electronics. Disconnect power to the System before replacing fuses.
Failure to follow these instructions will result in intermittent operation and premature
failure and will void the warranty.
•Metering Unit enclosure doors and module covers must be present and remain closed at
all times during operation to insure safety of personnel. A set of keys is provided for
locking enclosure doors. Only authorized personnel or technicians should be permitted
to open and service the unit.
•Bus current must be zero when taking resistance measurements.
•Use of the equipment in a manner not specified by the manufacturer can impair the
protection provided within.
DynAmp, LLC does not assume liability for the customer’s failure to comply with the rules
and requirements provided in this manual.

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DYNAMP, LLC CUSTOMER SUPPORT & SERVICE ASSISTANCE
For further assistance, contact DynAmp Customer Support at:
Americas:
Telephone: [phone] Fax: [phone]
8:00 AM to 5:00 PM USA Eastern Time
From first Sunday in November to second Sunday in March – 13:00 GMT to 22:00 GMT
From second Sunday in March to first Sunday in November – 12:00 GMT to 21:00 GMT
After Hours Critical Service Emergency:
Telephone: [phone]
5:00 PM to 8:00 AM USA Eastern Time
From first Sunday in November to second Sunday in March – 22:00 GMT to 13:00 GMT
From second Sunday in March to first Sunday in November – 21:00 GMT to 12:00 GMT
Central e-mail:
[email protected]
DynAmp web:
www.dynamp.com

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MANUAL REVISIONS
Page
Change
Reason For Revision
Date
All
Rev New
06/97
Front,
10,26,27
Rev A
Warranty Statement, Resistance Chart, Spare Parts
List, Drawings
01/98
iii, 27
Rev A1
Table of contents, Communication Procedures
12/99
Front,
8,11,13
Rev B
Warranty Statement, Installation Considerations
replaced, Table 2-1 replaced, Note changed
01/00
all
Rev C
Updated to current manual format
05/01
23, 29
Rev D
Update Accuracy Diagnostics, Spare Parts section
02/02
14-20
23
Rev E
Revised 4-3 paragraph 1, Circuit numbers in 4-8, 5-
10 & Table 4-3, removed section 4-10 & 4-11 / figure
4-5 & 4-6
12/02
13
Rev F
Revised Table 4-1.
03/03
iii, 5, 7, 16,
18
Rev G
Updated Warranty page and Installation paragraph,
Updated Table 3-2 & 4-3
09/03
all
Rev H
Update to DynAmp, LLC
11/04
5,16 Rev I
Update per ECO-3131 - insert line regarding fusing
of isolation transformer
10/05
v, 1, 26, 28
Rev J
Update fuse precautions per ECR 1304
07/06
33
K
ECO 3166 update accuracy diagnostics drawings/list
09/08
all
Rev L
PAR 10245 – Handling & Storage, ECR 1440-
Calibration Intervals / New Manual Format
11/10
31
Rev M
ECO 3265 Correct drawing list/update drawing
07/12
1,2,13,16
Rev N
ECO 3307 – Section 1 Safety, Installation
Precautions, Metering Unit Wiring
10/16
6, 31, iii, xi
Rev O
ECO 3350 – Add head assembly torque, add
drawing revisions in Table 8.1, replace drawing
G86.33.15.68 with 02A109641, update title blocks in
drawings, minor general verbiage updates for
Warranty Page and Customer Support & Service.
09/19

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1. HANDLING AND STORAGE
DynAmp products are engineered and manufactured for use in industrial environments.
However, they contain sensitive electronic and mechanical components which may be
damaged and fail if not handled and stored properly. All products must be handled and stored
with the same care as any precision measurement instrument. Severe bumps or jolts may
damage internal parts and cause malfunction or premature failure. DynAmp products are
designed and assembled with conformal coating, shock mounting, and environmental seals,
when appropriate or when specified. However, this protection requires that the product must be
properly installed and operational before the protection is fully functional. Therefore, adequate
protection from humidity, shock, and temperature must be provided during handling and storage
prior to installation.
The handling and storage of equipment must be sufficient to meet the storage temperature and
humidity specifications of the product and to prevent any condensation or contact with water or
any other liquid. The storage location and container or crate must provide adequate protection
from precipitation (rain, snow, ice) and direct water contact. Adequate shelter must be provided
to prevent the accumulation of precipitation (rain, snow, ice) and water which can lead to the
deterioration or failure of shipping containers or crates and cause water ingress. Storage in
coastal or industrial areas subject to salt-laden or corrosive air or areas of wind-driven sand or
other abrasive dust must be adequate to prevent the deterioration or failure of shipping
containers or crates and cause ingress. Frequent inspection of storage areas and storage
containers or crates is required to ensure proper storage conditions are being maintained.
If the shipping container or crate is opened and/or the equipment is removed for inspection prior
to installation, the equipment must be repackaged in the original undamaged container or crate
in the same manner as it was shipped to prevent environmental damage or placed in a storage
location that meets the required environmental and storage conditions.
General product storage temperature and humidity requirements:
Storage Temperature: -40 to 70°C
-40 to 158°F
Storage Humidity: Maximum 85%, non-condensing
DynAmp, LLC does not assume liability for the customer’s failure to comply with handling and
storage requirements.
For further assistance, contact DynAmp customer support.

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2. PRODUCT DESCRIPTION
2.1 SYSTEM OVERVIEW
The DynAmp, LLC LKP Series 4 Channel OEM is a system for accurately measuring direct
current in a bus. Each model of the LKP Series 4 Channel OEM consists of a two-piece
Measuring Head, a Metering Unit, and one or two multi-conductor cable depending on the
model.
2.2 ADDITIONAL MEASURING HEAD DETAIL
A magnetic core encircles the bus passing through the center of the Measuring Head.
Magnetic null detectors are mounted in air gaps around the core. Each null detector is flanked
by coils located on the magnetic core.
The housing material for the LKP-6 and LKP-12 models is a tough plastic with a fiberglass fill.
The larger LKP-15, LKP-30 Measuring Heads are constructed of cast aluminum with a tough
epoxy finish, insulation from the bus being provided by a 3/8 in.(9.5 mm) layer of high grade
epoxy. The Measuring Head halves are easily joined around the bus by use of 8 bolts.
Electrical connections for LKP-15, LKP-30 models are made through two multi-conductor
cables connected to each half of the Measuring Head. On LKP-6 and LKP-12 models,
individual conductors from each half of the Measuring Head are brought out to an external
terminal block, which in turn is connected to the Metering Unit via a single cable. All wires from
the Measuring Head are color coded and clearly marked according to the interconnection
diagrams supplied with this manual.
2.3 ADDITIONAL METERING UNIT DETAIL
The solid-state components of the Metering Unit are mounted on a heavy aluminum base plate
and are protected by an aluminum cover. The enclosure has a rating of IP20, with an available
IP54 enclosure option. Electrical connections from the control board and power board are
brought out to a terminal block which serves as a tie point for the Measuring Head cable, output
circuit, and ac input power. The Metering Unit provides output terminals that can provide the
customer a voltage signal proportional to the measured current and/or a current output.
2.4 INTERCONNECTION CABLE DETAIL
A standard 33-foot (10 meter) interconnecting cable is supplied with each system (longer cable
lengths are available - consult the factory for details). Each of the individual conductors is
tagged with a numbered label corresponding to a terminal block connection, providing an easy,
hookup.

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2.5 ELECTRICAL
Four outputs are provided by the system:
a. A current output of 1 Adc per 5 kA of bus current, at TB1-30 and TB1-29. Maximum
allowable voltage drop across the terminals is 15 Vdc at the maximum current output of the
bus.
b. A standard voltage output at terminals TB1-32 & TB1-31. The voltage is 100mV/kA for models
LKP-6 & LKP-12; and 10mV/kA for models LKP-15 & LKP-30.
c. An additional voltage at TB1-36 & TB1-35, when an optional shunt is installed.
A normally closed relay contact for accuracy diagnostics output at TB1-37 & TB1-38. This
feature is only available when the accuracy diagnostics option is ordered.

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3. SPECIFICATIONS
Table 3.1
LKP Series 4 Channel OEM Specifications
MODEL
MAX. FULL-SCALE RANGE*
MEASURING HEAD
WEIGHT
METERING UNIT
WEIGHT
LKP-6
6 kA
11 lb. (5 kg)
12 lb. (5.5 kg)
LKP-12
12 kA
28 lb. (13 kg)
12 lb. (5.5 kg)
LKP-15
15 kA
90 lb. (41 kg)
12 lb. (5.5 kg)
LKP-30
30 kA
125 lb. (57 kg)
12 lb. (5.5 kg)
Ambient Temperature Range of Measuring
Head
-20°C to 55°C
Ambient Temperature Range of Metering Unit
Location
-20°C to 55°C
Humidity (Measuring Head and Metering Unit)
85% maximum
AC Line Voltage at 50or60 Hz ±5Hz**
120 Vac +10%, -15%
Burden on ac Line ***
20 VA/kA
Maximum Allowable Burden of Output Circuit
15 volts
Linearity Error

±0.03% of full scale from 5% to 100% of bus
current.
Repeatability Error Limits
±0.02% of full scale plus zero error. 
Measuring Head To Bus Isolation
LKP-6, LKP-12
6kVac for 1 minute with 25mm air gap
LKP-15, LKP-30
12kVac for 1 minute with 25mm air gap
Installation Category
III
Pollution Degree
2
OUTPUTS
Current output: LKP-6, LKP-12
LKP-15, LKP-30
1 A/5 kA, ±0.2% full scale
1 A/5 kA, ±0.1% full scale
Voltage output, LKP-6, LKP-12
100mV per kA of bus current
Voltage output, LKP-1, LKP-30
10mv per kA of bus current
* Contingent upon DynAmp, LLC computer analysis of bus system.
** The LKP systems are factory-set for 50 or 60 Hz, per customer order. To operate a LKP system at a
different line frequency than was ordered, move jumper JP1 (located on the control board inside each
module) to the desired frequency.
*** Size any external isolation transformers for 30VA/kA to avoid overheating the transformers due to the
presence of SCR generated harmonics on the input ac line. If an isolation transformer is used both
input lines must be fused.
When tested at 115 Vac, less 1 V burden, 24°C ambient.
 Typical zero primary current errors (bus equiv.) for each model are shown in table 3.2.

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Table 3.1
LKP Series 4 Channel OEM Specifications, cont’d.
PHYSICAL
LKP Series 4 Channel OEM Overall Dimensions, in. (mm):
LKP Metering Unit (all)
14 (356) x 7.75 (197) x 7.625 (194)
LKP-6 Measuring Head 9.25 (235) x 10.25 (260.5)
LKP-12 Measuring Head
14.38 (365) x 17.75 (374.6)
LKP-15 Measuring Head 17.91 (455) x 18.00 (457)
LKP-30 Measuring Head 23.11 (587) x 23.23 (590)
Aperture Dimensions in. (mm):
LKP-6 Measuring Head
4.50 (114) x 4.50 (114)
LKP-12 Measuring Head 7.25 (184) x 7.25 (184)
LKP-15 Measuring Head 7.87 (200) x 7.87 (200)
LKP-30 Measuring Head
13.2 (335) x 13.2 (335)
LKP-15 & 30
Torque – Head assembly bolts M8- tighten until snug
(head top half to bottom assembly)
Never exceed 14 N.m (125 lb. in.)
NOTE
The Measuring Head window insulation rating is directly proportional to the clearance of the
head to the bus. For instance, a Measuring Head in direct contact with a bus will have an
insulation rating of 300V (LKP-6 & LKP-12) or 6kV (LKP-15 & LKP-30). A clearance of 1"
increases the window insulation rating to 6 kV (LKP-6 & LKP-12) and 2" clearance increases
the rating to 12 kV 12kV (LKP-15 & LKP-30),. Thus, the greater the distance through the air
between the bus and the Measuring Head, the greater the insulation rating will be.
Table 3.2
Typical Error At Zero Bus Current
Models
Max. Core Set
LKP-6
±7.5 amperes
LKP-12
±12 amperes
LKP-15
±2.25 amperes
LKP-30
±4.5 amperes