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HDPA-822 backup power supply self-starting and self-reset device |
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The HDPA series microcomputer backup power supply self-starting and self-reset device applies to a wide range of wiring modes. It can identify the operation mode of a system automatically, realize the switching on/off of the device’s forward and reverse operation. When the circuit’s fault is removed, the function of reverse automatic restoration is available.
1. Basic mode of backup self-starting
Usually, there are 2 basic backup self-starting modes for substations. One is shown in Figure 1-62, where 2 operating power supplies serve as the backup of each other, this is known as busbar coupler backup self-starting; the other is shown in Figures 1-63 and 1-64, where the backup power supply is normally backup, known as line backup self-starting. 2. Operation criterion of backup self-starting For backup self-starting, usually loss-of-voltage or loss-of-voltage plus under-current is used as the criterion. In addition to the conventional backup self-starting function, our MBZT series backup self-starting device has the system self-restoring function. To realize this function, the device introduces the live indicator contact mode in addition to the traditional VT collection voltage to judge whether there is voltage. The live/non-live state of the relevant units (incoming line or bus) may be judged from the state of the live indicator contact. If loss-of-voltage is used as the criterion only, the current end does not have to be connected, and the device can still operate on the normal logic. Ordering instructions Provide the following upon ordering: 1. Name, model and quantity of the device. Please specify any special requirement differs from our standard product. 2. Voltage class. The operating power supply for any device is intended for both AC and DC purposes, with 110V and 220V inputs; the 220V version will be provided unless otherwise specified. 3. Communication port: The device standard communication configure is a single 485. If needs dual RS485 network which shall be specified. 4. Ratings of key parameters For a protector, provide the nominal rated current (1Aor5A) For a device with the zero sequence current protection function in a low-current ground system, provide the rated zero sequence current (0.2Aor0.02A) 5. Term and place of delivery, means of transport 6. Other terms shall be negotiated. |
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