Products / DCC-4-R
Rack mount Static transfer switch
DCC-4-R
Rack-mount static transfer switch with a hot-swappable electronic module and maintenance bypass. 10 to 60 A three phase, or single phase up to 100 A.
Made in the USA with U.S. and imported parts
Current rating10–60 A
Three phase; 10–100 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 | Rack mount |
| 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: 10 A20 A30 A40 A50 A60 A Single phase: 10 A20 A30 A40 A50 A60 A70 A80 A90 A100 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
- Hot-swappable electronic module: MTTR under 2 minutes
- 3-position make-before-break maintenance bypass, with input isolation switches
- 2U, 19 in rack
- 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-R2-3P4-6480060-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; MTTR < 2 minutes |
Bypass and isolation
| Maintenance bypass | Hot-swappable electronic module (cradle) with 3-position, make-before-break rotary bypass switch to either source |
|---|---|
| Isolation | Input isolation switches, one on each source |
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 | Terminal blocks |
|---|---|
| Output termination | Terminal blocks |
Mechanical
| Rack height | 2U, 19 in rack. Use a rack shelf and cable strain relief where the unit weight exceeds the two-post mounting capacity of the rack. |
|---|---|
| Dimensions H × W × D | 3.5 × 19.0 × 18.1 in (88 × 483 × 460 mm) |
| Weight | 35 lb (16 kg) |
| Enclosure | NEMA 1 |
| Cooling | Redundant fans |
Environment
| Operating temperature | 32–104 °F (0–40 °C) |
|---|
Protection
| Short-circuit rating (bracing) | 10 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.
