DCT Series Charger Manual IMPORTANT SAFETY INSTRUCTIONS SAVE THESE INSTRUCTIONS This manual contains important safety and operating instructions for Stored Energy Systems (SENS) model DCT. Before using the battery charger, read all instructions and cautionary markings on the battery charger, battery and equipment connected to the battery system.
Page 3
DCT Series Charger Manual This manual covers installation, operation and troubleshooting of SENS model DCT filtered battery charger in case size 2A. Overview READ THIS FIRST Please follow the installation and use instructions. They are vital to the satisfactory operation of the charger.
Page 4
DCT Series Charger Manual FIGURE 2.1 Lifting Instructions WHEN INSTALLING DO NOT LIFT UNIT FROM MIDDLE OF LOWER COVER - THE COVER WILL BEND. USE A SPREADER PLATE EQUIVALENT TO 1" THICK PLYWOOD ACROSS THE BOTTOM OF THE UNIT WHEN LIFTING The charger can be mounted either on a wall or in a standard 19”...
Page 5
DCT Series Charger Manual FIGURE 2.2a Power Connections - 240 Volts AC Input or Lower AC INPUT DC OUTPUT 240 VAC OR LESS MAKE INPUT & OUTPUT CONNECTIONS DIRECT TO CIRCUIT BREAKERS AS SHOWN. FIGURE 2.2b Power Connections - 277, 380, 415 or 480 VAC...
Page 6
DCT Series Charger Manual TABLE 2.2 AC Input Circuit Breaker Ratings Charger output Breaker Breaker 115 V 230 V amps amps same 24 100 same same same Caution: Do NOT connect the battery backwards; charger damage may result. The voltmeter will show battery voltage as soon as the DC connection is completed. Check the voltmeter as soon as the DC connection has been made.
Page 7
DCT Series Charger Manual TABLE 2.4 Charger Part Number Suffix and Alarms Configuration -4042, -6042, -4642, -6642, -7042, -8042 -7642, -8642 Alarms “0” Alarms “6” Charger alarm system code Indication None Float or boost mode None AC fail LED & Form C contact...
Page 8
DCT Series Charger Manual The two leads of the optional RTS are connected to a port on the control board as follows: Connect the yellow lead of the sensor to J7 “YEL” and the violet lead to J7 “VIO”. If the sensor is connected properly “RTS OFF”...
Page 9
DCT Series Charger Manual BOOST This voltage is slightly higher than the float setting. Boost slightly overcharges the battery in order to ensure that all the cells of a battery are fully charged to the same voltage. Continued operation in boost is not recommended because the high charging voltage will cause battery electrolyte to boil away quickly.
Page 10
DCT Series Charger Manual FIGURE 3.4 LED Indicators on Charger Front Panel LAMP TEST AC ON AC FAIL CHGR FAIL + GROUND LOW DC - GROUND BOOST HIGH DC FLOAT SHUTDOWN AC ON Indicates that AC power is being supplied to the charger.
Page 11
DCT Series Charger Manual HIGH DC SHTDN Indicates that the charger has been shut down by the high output voltage shutdown circuit. Probable causes of a high DC shutdown are as follows: a) The float or boost voltages have been increased above the pre-set shutdown voltage.
Page 12
DCT Series Charger Manual 4. Adjust the FLOAT pot until the desired voltage is achieved. Adjustment of the BOOST voltage is similar to adjustment of FLOAT, except that you adjust the BOOST pot instead of the FLOAT pot. Be sure that the charger front panel mode switch is in BOOST when you make adjustments.
Page 14
DCT Series Charger Manual Troubleshooting Table If there is a problem and you suspect the charger is at fault, turn off the AC mains supply before Trouble- proceeding. Ensure that the following are correct: AC input wiring, battery and/or load connections shooting and PC card connectors.
Page 15
DCT Series Charger Manual Component Diagnostic Tests Test #1: With transformer leads disconnected, energize the transformer with the normal AC supply voltage. Measure entire secondary voltage. It should be 1.5 to 2 times the nominal battery voltage. Test #2: With one or both leads disconnected from the inductor, measure the resistance across the inductor terminals.
Page 16
DCT Series Charger Manual Diagram of Automatic Boost Operation (Optional Feature) Appendix Boost voltage Float voltage Battery voltage Point at which charger changes from current limit to voltage limit Volts Point at which AUTOBOOST returns charger to float voltage 100% charger...
Page 18
FAIL FAIL FAIL NOTES: 1. INPUT VOLTAGES OF 277VAC & GREATER WILL REVERSE THE CONTRACT NO. SENS STORED ENERGY SYSTEMS Longmont, CO POSITION OF BREAKERS. DRAWN DATE TITLE CHECKED DCT 1 & 2A CASE 2. A3 OPTIONAL ONLY IF UNIT IS...
Need help?
Do you have a question about the DCT Series and is the answer not in the manual?
Questions and answers