The NDQ3HP bypass automatic transfer switching equipment is suitable for emergency power supply systems with rated operational voltage up to AC415V rated frequency of 50/60Hz and rated current from 100A to 5000A enabling automatic transfer between two power sources.The bypass automatic transfer switching equipment is mainly composed of an automatic transfer switching equipment (ATSE) and a bypass transfer switch (MTSE). Before the automatic transfer switch is withdrawn for inspection testing or maintenance the load can first be supplied by the same-side power source through the bypass transfer switch. After that the automatic transfer switch can be withdrawn for inspection testing or maintenance without causing power interruption to the load during operation.
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Features of NDQ3HP Series
Neutral overlapping transfer function helps solve neutral line drift and avoid dangerous voltage on the neutral pole.The bypass transfer switch has the same rated capacity as the automatic transfer switch.
Allows the load to be transferred to the bypass transfer switch without power interruption.
Utilization category reaches AC-33A.
Supports in-phase transfer, delayed transfer, and neutral overlapping transfer functions.
The ATSE and MTSE are arranged in an upper-and-lower structure, allowing a more direct and clear view of the switch status.
Technology data of NDQ3HP Series
| ATSE Model | NDQ3HP-3200 | NDQ3HP-5000 |
| Rated operational current Ie (A) | 100、250、400、500、630、800、1000、1250、1600、2000、2500、3200 | 1600、2000、2500、3200、4000、5000 |
| Rated operational voltage Ue (V) | AC400/415 | |
| Number of poles | 3, 4, N3 (products with neutral overlapping transfer function) | |
| Utilization category | AC-33A | |
| Rated short-time withstand current Icw (kA) at 400/415V | 66/60ms | 85/60ms |
| Equipment class | Dedicated PC class | |
| Transfer category | In-phase transfer / delayed transfer | |
| Position of main contacts | Three-position / two-position | |
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Factory Address：Pudong, Shanghai, China / Jiaxing, Zhejiang, China
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