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C&D Technologies UPS12-300MR Battery Replacement
C&D Technologies UPS12-300MR Battery Replacement
C&D Dynasty UPS12-300MR Battery - 12V 78.6 Ah High Rate Max AGM
Warranty
Reading the 300MR Discharge Table
- Recommended maximum charging current - C20 divided by 5, which for this block's 78.6 Ah works out to 15.7 amps per unit.
- UL-recognized component - compliant with UL1778, UL 924, UL 1989 and UL 94 V-2, and with the European BS6290-4 and IEC-896-2 references.
- Thermally welded case-to-cover bond - a flame retardant polypropylene case and cover with no mechanical seam to seep at the joint.
- Non-hazardous by land, sea and air - outside DOT-CFR Title 49 parts 171-189, IMDG Amendment 27, and IATA and ICAO Special Provisions A67.
- Float charge voltage 13.65 ± 0.15 VDC - the average per 12V unit; C&D's separate equalize and cycle-service window runs 14.4 to 14.8 VDC at 77°F.
Technical Specifications
| C&D UPS12-300MR Specifications | |
|---|---|
| Part Number | UPS12-300MR (also searched as UPS12 300MR, UPS12300MR; sold under the C&D Dynasty brand) |
| Series | UPS High Rate Max (MR), retired by C&D, replaced by UPS12-305PLP |
| Battery Type | AGM, valve regulated lead acid (VRLA), high rate |
| Nominal Voltage | 12V (6 cells per unit) |
| Nominal Capacity | 78.6 Ah at the 20-hour rate to 1.75 VPC at 25°C (77°F) |
| Watts Per Cell | 300 W per cell at the 15-minute rate to 1.67 VPC at 77°F |
| Constant Power to 1.75 VPC | 493 W/cell at 5 min, 360 at 10 min, 281 at 15 min, 232 at 20 min, 175 at 30 min, 103 at 60 min, 73.5 at 90 min |
| Constant Power to 1.70 VPC | 525 W/cell at 5 min, 379 at 10 min, 293 at 15 min, 240 at 20 min, 179 at 30 min, 104 at 60 min, 74 at 90 min |
| Constant Power to 1.67 VPC | 546 W/cell at 5 min, 385 at 10 min, 300 at 15 min, 245 at 20 min, 183 at 30 min, 106 at 60 min, 75 at 90 min |
| Terminal Type | Top terminal, threaded insert, 1/4-20 UNC bolt |
| Terminal Torque | 110 in-lbs (12.4 N-m) |
| Length | 10.27 inches (260.9 mm) |
| Width | 6.83 inches (173.4 mm) |
| Height | 7.89 inches to case top (200.3 mm) |
| Total Height | 8.01 inches over terminals (203.5 mm) |
| Weight | 58.4 lbs (26.5 kg) |
| Short Circuit Current | 3,600 A at 0.1 second |
| Impedance | 0.004 ohms at 60 Hz (reference figure; C&D recommends individual baselines) |
| Design Life | 10 year design life at 25°C (C&D) |
| Warranty | 3 years at 25°C (77°F) (C&D Form 41-9027, UPS High Rate Max series) |
| Minimum Order | 4 units |
Where This Battery Is Used
- Data center and colocation UPS strings - twenty to forty blocks in series, carrying the load to generator transfer.
- Power generation plants - switchgear control and tripping power held on a maintained float charge.
- Semiconductor fabs - tool and process power where the restart, not the outage, is the expensive part.
Ordering and Freight
Frequently Asked Questions
What does a UPS12-300MR string hold at 20 and 30 minutes?
At 20 minutes, 232 watts per cell to 1.75 volts per cell or 245 to 1.67. At 30 minutes, 175 and 183. Per block that is 1,392 watts for twenty minutes and 1,050 for thirty at the 1.75 end point, so a 40-block 480 VDC string carries roughly 55.7 kW for twenty minutes. Send the UPS load and the runtime and a specialist works the count from the published row.
How should the 1/4-20 terminals be prepared before the cables go on?
Brush the lead contact faces lightly with a brass bristle brush to take off transport oxidation, then coat them with an antioxidant grease such as NO-OX-ID or NCP-2. Do the same to the cable lug face. C&D's rack guide calls for this on every connection and then a torque wrench at 110 in-lbs. Do not grease the rack rails or the case itself, because some compounds attack the plastic.
What charger ripple does C&D allow on a 300MR string?
C&D recommends 0.5 percent RMS, or 1.5 percent peak to peak, of the float charge voltage. The published maximum allowed is 1.4 percent RMS, which is 4 percent peak to peak, with maximum ripple current capped at C divided by 20 at the 20-hour rate. On this block that current cap is 3.93 amps. Ripple above the limit heats the plates and shortens the string.
What freshening charge does a new UPS12-300MR string need?
2.4 volts per cell average for 24 hours, which is 14.4 volts per 12V unit with a tolerance of plus or minus 0.50 volts. C&D calls for it when the blocks have been in storage or transit for a while, when the plant floats at the low end of the range, or when more than 24 cells sit in series. Watch that current acceptance declines and that no block runs more than 5°F off its neighbors, then move to float.
Send the quantity, your delivery ZIP and your requested-by date. A specialist confirms availability, the warranty term, volume pricing and freight in writing, with no obligation to buy.
Call 1-877-775-4381 · battery specialists, not a call centerWARNING: Cancer and Reproductive Harm - www.P65Warnings.ca.gov (State of California only).
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