KEPCO JQE 150-1.5MVPY-26956 Half Rack - Manual (Page 11)

JQE 26956 081111
1-1
SECTION 1 - INTRODUCTION
1.1 SCOPE OF MANUAL
This manual contains instructions for the installation, operation and maintenance of the specially
modified Kepco JQE 150-1.5MVPY-26956, "HALF-RACK" Power Supplies, manufactured by
Kepco, Inc., Flushing, New York, U.S.A. This model is one of a group of three specially modified
JQE power supplies (see Table 1-1) referred to, hereafter referred to as JQE Special Power Sup-
plies or JQE Specials. Additional copies of this manual can be downloaded from the Kepco web
site at
http://www.kepcopower.com/support/opmanls.htm#jqe.
1.2 GENERAL DESCRIPTION
The Kepco JQE Special Power Supplies are general purpose, precision regulated voltage
sources in the “half-rack” configuration. JQE Power Supplies feature full range voltage control
and current limit adjustment by means of multi-turn front panel controls. JQE Special power sup-
plies have linear, full-dissipation series-regulators (NPN) driven by an integrated circuit opera-
tional amplifier. A sharp current-limit circuit enables current control operation of the power
supply. The output of the JQE power supply is programmable. All necessary connections are
available on terminals at the rear barrier-strips.
The compact design of the JQE Specials was made possible by a unique heatsink design of
exceptional efficiency in combination with highly reliable low-noise fans. All JQE power supplies
feature all-silicon design with conservatively rated components for added reliability.
JQE special power supplies are identical in their mechanical dimensions (Refer to FIG. 1-3) and
in their electrical specifications, except as noted in Table 1-1.
1.3 FEATURES.
The three JQE Specials include the following features:
a) Two panel meters which permit simultaneous monitoring of the output voltage and out-
put current.
b) Overvoltage Protection. This protection acts simlutaneously on the circuit breaker’s volt-
age coil and the electrical "crowbar" that shorts the output through a silicon-controlled
rectifier (SCR) if the output voltage exceeds a preadjustable limit (see paragraph 1.7.5a)
for specifications).
c) Zero and full scale voltage calibration for local front panel voltage control.
d) Zero and full scale current calibration for CURRENT LIMIT “B”
e) Full scale current calibration for CURRENT LIMIT “A”
f) Zero and full scale current calibration for CURRENT MONITOR
g) Full scale calibration for remote resistive voltage control
h) Overvoltage protection adjustment
i) Overvoltage protection delay adjustment
The main chassis frame of the power supply is constructed from cold-rolled steel, as is the per-
forated wrap-around cover. Front panel material is aluminum (Refer to FIG. 1-3 for finish).