©2015, KEPCO, INC
1
Data subject to change without notice
228-1744 REV 3
I N S T R U C T I O N M A N U A L
BOP 1000W
KEPCO
KEPCO, INC.
131-38 SANFORD AVENUE
FLUSHING, NY. 11355 U.S.A.
TEL (718) 461-7000
FAX (718) 767-1102
http://www.kepcopower.com
email: [email protected]
An ISO 9001 Company.
Transition Circuit
KIT 219-0548
BOP 6-125MG
TRANSITION CIRCUIT KIT
1. DESCRIPTION
Kepco KIT 219-0548 contains components used for a field upgrade of BOP 6-125MG power supplies to allow
smoother transitions through zero power when driving inductive loads at low frequencies and/or at a low rate of
output power changes. This upgrade avoids possible faults under these conditions which can cause the unit to dis-
play an error and reduce output power to zero.
The Transition circuit detects when the voltage and the current at the BOP output have opposite signs, showing
that the unit is beginning to sink power. This turns on a preload placed between the Front End Module and the Out-
put Module of the BOP. If the Sink power increases to the point that the Source-Recuperation Detector is triggered,
the Front End switches to Sink-Recuperation mode at an increased level of power, as the preload is turned off by
the Source-Recuperation Detector. This permits a sharper transition towards Sink-Recuperation mode. If the Front
End switches to Source mode, the preload is activated for a predetermined period of time in order to boost the
power requested from the Front End, resulting in a sharper transition towards the Source mode.
2. APPLICABILITY
This KIT applies only to BOP 6-125MG models. Contact Kepco for kits applicable to other models. This manual
applies only to Rev 2 Transition Circuit Assemblies.
3. INSTALLATION INSTRUCTIONS
3.1 MATERIAL SUPPLIED
(See Table 1.)
TABLE 1. MATERIAL SUPPLIED
MATERIAL
KEPCO PART NUMBER
QUANTITY
Transition Circuit assembly (A7A3)
comprised of (1) Printed Circuit Board assembly (236-
3069), (1) Heat Sink assembly (136-0481) and other related
components
300-0535
1
Screw, PHPH, 6-32 x 0.5 in.
101-0519
2
Cable Assembly, A2A5 to A7A3J1 (5-Pin connector)
118-1265
1
Cable Assembly, A4A8 to A7A3J3 (4-Pin connector)
118-1266
1
Cable Assembly, A4A8 to A7A3J4 (3-Pin connector)
118-1267
1
Resistor, 150KOhms, 1%, 1/8W (R59)
115-2597
1
Resistor 200KOhms, 1%, 1/4W (R58, R70)
115-2809
2
Cable Tie
138-0076
5
Adapter Plate
128-2412
1
Screw, FLPO, 6-32, 0.375 IN., ST
101-0332
2
Self-adhesive Plastic Mount Cable Tie
138-0089
3
Instruction Manual
228-1744 REV 3
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