KEPCO KRR 12-20 Railroad Battery Charger - Manual

©2006, KEPCO, INC 1
Data subject to change without notice 228-1561
I N S T R U C T I O N M A N U A L
KEPCO
KEPCO, INC. " 131-38 SANFORD AVENUE " FLUSHING, NY. 11352 U.S.A. " TEL (718) 461-7000 " FAX (718) 767-1102
http://www.kepcopower.com " email: [email protected]
An ISO 9001 Company.
KRR
12-20
12 VOLT, 300W RAILROAD BATTERY CHARGER
I — INTRODUCTION
SCOPE OF MANUAL.
This instruction manual covers the installation and operation of the Kepco Model KRR 12-20 12-Volt, 300W Railroad Battery
Charger.
DESCRIPTION.
The Kepco Model KRR 12-20 12-Volt, 300W Railroad Battery Charger is a wall-mounted unit designed to charge 12-Volt lead-
acid or nickel cadmium batteries used in railroad applications. The output voltage is set to 13.50V d-c, and is adjustable from
10.5 to 18V d-c from the front panel. An optional temperature compensation probe (supplied) provides automatic adjustment of
the float voltage to accommodate temperatures from 0° to 50°C. Units may be operated with a nominal 100V a-c to 240V a-c
(input voltage range 85 to 265 Va-c), 50-60 Hz (input frequency range 47-66Hz.). Both line and neutral lines are protected by
10A fuses. A front panel ammeter shows charging current.
The heart of the Model KRR 12-20 is a 300W solid-state switching power supply, Kepco’s RKW 15-22K-26534, which has an
integral cooling fan. A front panel CHARGER ON indicator lights while input power is applied to the a-c input terminals. The
front panel TEMP PROBE ERROR indicator lights to show that the temperature compensation probe is not connected to the
unit. An internal diode network across the output provides protection in the event that the battery connections are reversed,
causing the front panel circuit breaker to open.
FEATURES
• Wide Range Input - Operates from input voltage range of 85 to 265V a-c, input frequency range 47-66Hz
with no adjustment or modification required.
• Adjustable Float Voltage - The float voltage is factory set to 13.50V d-c, and is adjustable from 10.5 to 18V
d-c at the front panel by connecting a precision voltmeter to the + and – VOLTAGE MONITOR test points
and adjusting the output using the V. FLOAT ADJUST potentiometer.
• Temperature Compensation - An optional temperature compensation probe (supplied) provides automatic
adjustment of the float voltage to accommodate temperatures from 0° to 50°C
• CHARGER ON indicator - on while a-c input power applied to unit.
• Charging Current ammeter - indicates charging current
• Input protection - Two line fuses (10A/250V) are provided.
• Battery connection protection - If battery connections are reversed, an internal diode network across the
output is forward biased; the resulting current flow causes the front panel circuit breaker to pop open. The
connections must be switched and the circuit breaker pushed in to reset.