CQW5NEDZ Series DC Frame Isolation Switch
Product Features
■ Up to DC1500V
Designed for DC systems with rated operational voltage up to DC1500V.
■ Wide Current Range
Rated current range from 400A to 4000A, with 1600A,2500A and 4000A frame sizes.
■ High Short-Time Withstand Capacity
Rated short-time withstand current up to 100kA for 1s.
■ Reliable DC Isolation
Designed for making, breaking and isolating main circuits in photovoltaic and energy storage DC systems.
■ Compact Modular Structure
Compact fixed-type design with modular operating units and zero arcing distance.
Type designation
| No. | Code | Description |
| ① | CQ | Company Code |
| ② | W | Frame-Type Switch |
| ③ | 5 | Design Code |
| ④ | NEDZ | New Energy – DC |
| ⑤ | 1600 / 2500 / 4000 | Frame Size |
| ⑥ | 2 | Number of Poles: 2P |
| ⑦ | □ | Rated Current |
| ⑧ | □ | Control Voltage |
| ⑨ | □ | Fixed Type |
Operating Conditions
| Ambient Temperature | -40℃ to +70℃ |
| 24-hour Average Temperature | ≤+35℃ |
| Normal Operating Altitude | ≤5000m |
| Relative Humidity | ≤50% at +40℃ |
| Max. Monthly Average Relative Humidity | 0.9 |
| Corresponding Monthly Average Min. Temperature | +25℃ |
| Installation Position | Vertical |
| Installation Inclination | ≤5° |
| Pollution Degree | 3 |
| Installation Category – Main Circuit | IV |
| Installation Category – Auxiliary / Control Circuit | III |
| Degree of Protection | IP30 / IP40 (IP40 when installed in a cabinet compartment with a door frame.) |
| Utilization Category | 1600A:DC-22A / DC-PV2 2500A,4000A:DC-23A / DC-PV2 |
Technical Specifications
| Parameter | CQW5NEDZ-1600 | CQW5NEDZ-2500 | CQW5NEDZ-4000 |
| Frame size (A) | 1600 | 2500 | 4000 |
| Rated current (A) | 400, 630, 800, 1000, 1250, 1600 | 800, 1000, 1250, 1600, 2000, 2500 | 800, 1000, 1250, 1600, 2000, 2500, 2800, 2900, 3200, 3600, 4000 |
| Number of poles | 2P | 2P | 2P |
| Rated operational voltage Ue (V) | DC1500 | DC1500 | DC1500 |
| Rated insulation voltage Ui (V) | 2000 | 2500 | 2500 |
| Rated impulse withstand voltage Uimp (kV) | 15 | 15 | 18 |
| Pole spacing (mm) | 80 | 95 | 115 |
| Rated short-circuit making capacity Icm (kA) | 50 | 85 | 100 |
| Rated short-time withstand current Icw | 50 kA/1 s, 120 kA/0.1 s | 85 kA/1 s, 150 kA/0.2 s | 100 kA/1 s, 160 kA/0.2 s |
| Utilization category | DC-22A, DC-PV2 | DC-23A, DC-PV2 | DC-23A, DC-PV2 |
| Total breaking time, without intentional delay (ms) | — | ≤25 | ≤25 |
| Closing time (ms) | ≤70 | ≤70 | ≤70 |
| Electrical endurance (cycles) | 500 | 500 (DC-23A); 1,500 (DC-PV2) | 500 (DC-23A); 1,500 (DC-PV2) |
| Mechanical endurance maintenance-free (cycles) | 10000 | 15000 | 15000 |
| Mechanical endurance with maintenance (cycles) | — | 25000 | 25000 |
| Temperature rise at a reference ambient temperature of 50°C (K) | — | <50 | <50 |
| Arcing distance (mm) | — | 0 | 0 |
| Installation type | Fixed type | Fixed type | Fixed type |
| Connection type | — | Horizontal connection | Horizontal connection |
| Overall dimensions (W × D × H), mm | 214 × 240 × 320 | 278 × 329 × 403 | 298 × 372 × 406 |
| Environmental compliance | — | RoHS 2.0 | RoHS 2.0 |
| Applicable standards | GB/T 14048.3, IEC 60947-3 | GB/T 14048.3, IEC 60947-3 | GB/T 14048.3, IEC 60947-3 |
Electrical circuit diagram
CQW5NEDZ-2500
CQW5NEDZ-4000
Symbols and descriptions
| Symbol | Description |
| X | Closing solenoid |
| F | Shunt release |
| FU | Fuse (user supplied) |
| M | Motor operating mechanism |
| QS | Isolating switch |
| S1 | Indicator lamp (user supplied) |
| SA | Motor mechanism limit switch |
| Symbol | Description |
| SB2 | Close pushbutton (user supplied) |
| SB3 | Open pushbutton (user supplied) |
| XT | Secondary circuit terminal |
| Q | Undervoltage release |
| PF | Ready-to-close contact |
Notes
(1) Dashed-line wiring is to be connected by the user.
(2) If the control voltages of Q, X, F and M differ, connect them to separate suitable power supplies.
(3) Terminal 29 may be connected directly to the power supply for automatic spring charging, or through a normally open pushbutton for manual spring charging.
Overall and mounting dimensions
CQW5NEDZ-1600
CQW5NEDZ-2500
| Current rating | L/mm |
| 800–1600A | 8 |
| 1600–2500A | 10 |
CQW5NEDZ-4000
| Current rating | L/mm |
| 800–2500A | 10 |
| 2800–4000A | 20 |
