Products / DCC-4-S
Free standing Static transfer switch
DCC-4-S
Free-standing static transfer switch for distribution-level loads, 100 to 600 A single or three phase, with maintenance bypass.
Made in the USA with U.S. and imported parts
Current rating100–600 A
Three phase; 100–600 A single phase. 100% continuous duty.
Voltage100–480 V
Three or single phase, 50 Hz or 60 Hz.
Switched poles2, 3 or 4
4-pole builds transfer the neutral too.
Transfer time¼ cycle
As fast as, per phase: 4.2 ms at 60 Hz, 5 ms at 50 Hz. SCR-based, break-before-make.
Ratings
| Type | Static transfer switch (STS) |
|---|---|
| Mounting | Free standing |
| Phase and poles | Three-phase 3 or 4-pole, or single-phase 2-pole |
| Voltages | 3-pole: 480 V415 V400 V240 V220 V208 V200 V 4-pole: 480/277 V415/240 V400/230 V208/120 V200/115 V Single phase 2-pole: 240 V230 V220 V208 V200 V120 V100 V |
| Current ratings | Three phase: 100 A150 A200 A250 A300 A400 A500 A600 A Single phase: 100 A150 A200 A250 A300 A400 A500 A600 A |
| Frequency | 50 Hz or 60 Hz |
What it does
- As fast as ¼ cycle per phase, break-before-make, with an automatic Vt-proportional delay out of phase
- Maintenance bypass with 5 or 6 mechanically interlocked molded-case switches; input and output isolation
- 22 kA short-circuit rating with upstream Class J fuses
- Free-standing NEMA 1 cabinet with redundant fans
- Three phase 3-pole or 4-pole, or single phase 2-pole, at all standard voltages, 50 Hz or 60 Hz
- Bi-color LED mimic or color touchscreen
- Ethernet with HTTP, SNMP and Modbus TCP/IP; 5 dry status contacts and 2 transfer control inputs
- 100% continuous duty at 104 °F (40 °C)
- ETL listed to UL 1008S
Reading the model number
Format D4-ES-PPP-FVVVAAA-I, for example D4-SK-3P4-6480600-M
D4DCC-4 base model
ESEnclosure and sub-model: R2 rack, R4 rack (higher current), W2 wall, W4 wall (higher current), SK free standing
PPPPhase and poles: 1P2 single phase 2-pole, 1P3 split phase (on request), 3P3 three phase 3-pole, 3P4 three phase 4-pole
FFrequency: 6 = 60 Hz, 5 = 50 Hz
VVVVoltage, e.g. 480
AAACurrent, e.g. 060 = 60 A
IInterface: M bi-color LED mimic, T color touchscreen
Specifications
Transfer
| Transfer type | Break-before-make, zero-current transfer by thyristors (SCRs) |
|---|---|
| In-phase transfer time | As fast as ¼ cycle per phase (4.2 ms @ 60 Hz, 5 ms @ 50 Hz) |
| Out-of-phase transfer | Automatic Vt proportional delay, up to 12 ms, 0° to 180° |
| MTBF | > 800,000 hours |
Bypass and isolation
| Maintenance bypass | Bypass with 5 or 6 mechanically interlocked molded-case switches |
|---|---|
| Isolation | Input isolation switches on each source, plus output isolation switch |
Controls and monitoring
| Display | Bi-color LED mimic or color touchscreen |
|---|---|
| Front-panel controls | Preferred supply selection, source transfer selection and alarm cancel buttons |
| Control inputs | 2 wet transfer control inputs |
| Status contacts | 5 dry change-over status contacts, Form C |
| Communications | Ethernet: HTTP, SNMP, Modbus TCP/IP |
Connections
| Input termination | Bolt terminals for lugs |
|---|---|
| Output termination | Bolt terminals for lugs |
Mechanical
| Dimensions H × W × D | 74.8 × 31.5 × 15.7 in (1900 × 800 × 400 mm) |
|---|---|
| Weight | Up to 650 lb (295 kg), depending on rating |
| Enclosure | NEMA 1 |
| Cooling | Redundant fans |
Environment
| Operating temperature | 32–104 °F (0–40 °C) |
|---|
Protection
| Short-circuit rating (bracing) | 22 kA with upstream Class J fuses |
|---|
Compliance
| Regulatory approvals | ETL listed to UL 1008S |
|---|---|
| Standard warranty | 12 months from start-up or 18 months from shipment, whichever is sooner |
Specifications are subject to change without notice. Wire sizes and installation details: ask our engineers.
