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STS-(3000K, 6000K)-H1 Smart Transformer Station Installation Guide
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Huawei uses machine translation combined with human proofreading to translate this document to different languages in order to help you better understand the content of this document. Note: Even the most advanced machine translation cannot match the quality of professional translators. Huawei shall not bear any responsibility for translation accuracy and it is recommended that you refer to the English document (a link for which has been provided).
Interlocking of an STS

Interlocking of an STS

  • The internal interlocking is configured only for the high-configuration STSs. The interlocking has been commissioned before delivery and can be tested and verified on site.
  • K3, K4, K8, and K9 are equipped with a key ring and a blank label.

STS-3000K-H1 Interlocking

  1. Mechanical lock K8 is configured for ACB 1 in LV PANEL A. After the K8 key is inserted, you can turn on or off ACB 1. You can remove the K8 key only after the ACB is turned off.
  2. Mechanical lock K4 is configured at the operation hole of the disconnector in the MV circuit breaker cabinet. After the K4 key is inserted, you can turn on or off the disconnector. You can remove the K4 key only after the disconnector is turned on.
  3. Mechanical lock K3 is configured at the operation hole of the grounding switch in the MV circuit breaker cabinet. After the K3 key is inserted, you can turn on or off the grounding switch. You can remove the K3 key only after the grounding switch is turned on.
  4. Exchange Box2, a key switching box, is installed in the MV room. The supported key numbers are K10, K11, and K12. The K11 and K12 keys can be removed only after the K10 key is inserted. The K10 key can be removed only after the K11 and K12 keys are inserted.
  5. The transformer room has two doors, each equipped with a mechanical lock, that is, K13 and K14. After inserting the K13 and K14 keys, you can open the corresponding transformer room door. The mechanical locks can be locked and the keys can be removed only after the doors are closed.

    Figure 5-5 STS-3000K-H1 factory key connection

STS-6000K-H1 Interlocking

  1. Mechanical lock K8 is configured for ACB 1 in LV PANEL A. After the K8 key is inserted, you can turn on or off ACB 1. You can remove the K8 key only after the ACB is turned off.
  2. Mechanical lock K9 is configured for ACB 2 in LV PANEL B. After the K9 key is inserted, you can turn on or off ACB 2. You can remove the K9 key only after the ACB is turned off.
  3. Exchange Box1, a key switching box, is installed in the LV room. The supported key numbers are K5, K6, and K7. The K6 and K7 keys can be removed only after the K5 key is inserted. The K5 key can be removed only after the K6 and K7 keys are inserted.
  4. Mechanical lock K4 is configured at the operation hole of the disconnector in the MV circuit breaker cabinet. After the K4 key is inserted, you can turn on or off the disconnector. You can remove the K4 key only after the disconnector is turned on.
  5. Mechanical lock K3 is configured at the operation hole of the grounding switch in the MV circuit breaker cabinet. After the K3 key is inserted, you can turn on or off the grounding switch. You can remove the K3 key only after the grounding switch is turned on.
  6. Exchange Box2, a key switching box, is installed in the MV room. The supported key numbers are K10, K11, and K12. The K11 and K12 keys can be removed only after the K10 key is inserted. The K10 key can be removed only after the K11 and K12 keys are inserted.
  7. The transformer room has two doors, each equipped with a mechanical lock, that is, K13 and K14. After inserting the K13 and K14 keys, you can open the corresponding transformer room door. The mechanical locks can be locked and the keys can be removed only after the doors are closed.

    Figure 5-6 STS-6000K-H1 factory key connection

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Updated: 2019-12-05

Document ID: EDOC1100115701

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