Cooper offers a family of standardized transformer designs (SST Transformers) that can provide you with faster delivery at very competitive prices. By standardizing on the designs and accessories most often requested by customers, Cooper Power Systems is able to offer transformers from stock or with very short lead times, so your project can get on-line faster. Available in overhead, pad and substation configurations, single- and three-phase, mineral oil or R-Temp fluid-filled, SST transformers are suitable for the vast majority of applications, without the long lead-times associated with special designs. SST transformers are available in the following configurations:

Single-Phase Overhead

kVA: 10-167
PRIMARY VOLTAGE: 7200, 7620, 14,400 and 7200 x 14,400 V
SECONDARY VOLTAGE: 120/240 V

Single-Phase Pad-mounted

kVA: 25-100
PRIMARY VOLTAGE: 7200, 7620, 14,400 and 7200 x 14,400
Loopfeed, Dead-front, ANSI Type-2
- SECONDARY VOLTAGE: 240/120 V

Three-Phase Pad-mounted

kVA: 75-2500
PRIMARY VOLTAGE: 4160-24,940 V
(Grounded Wye and Delta connected)
- Loopfeed, Dead-front
- Radial Feed, Dead-front
- Radial Feed, Live-front
SECONDARY VOLTAGE: 480Y/277 V 208Y/120 V through 1000 kVA

Open & Unit Substation

kVA: 500-2500
PRIMARY VOLTAGE: 2400-14,400 V
(Delta connected)
SECONDARY VOLTAGE: 480Y/277 V
(Only sidewall mounted-flange, throat or air
terminal chamber accessible high-voltage
and low-voltage connections)