Classification of high and low voltage switchgear
1、Low voltage withdrawable switchgear
2、AC low voltage distribution cabinet
3、Metal-armoured transfer type switchgear cabinet
4、Low-voltage fixed separation type switchgear cabinet
5、High-voltage capacitor cabinets
6、High-voltage switchgear
High and low voltage switchgear safety technology operating procedures
1、Working on the wholly and partially charged discs shall separate the maintenance equipment from the running equipment with obvious signs.
2、The secondary winding of current transformer and voltage transformer should have permanent and reliable protection grounding.
3、in the operation of the current transformer secondary circuit work, should take the following safety measures:
High-voltage switchgear
3.1、It is strictly prohibited to disconnect the current circuit.
3.2 In order to reliably short-circuit the secondary coil of the current transformer, short-circuiting tabs and short-circuiting wires must be used; wire wrapping is prohibited.
3.3 It is prohibited to carry out any work on the circuits and wires between the current transformer and the short-circuit terminals.
4. When working on the secondary circuit of the voltage transformer in operation, the following safety measures shall be taken:
4.1 Strictly prevent short-circuiting or grounding.
4.2 Insulated tools and insulated gloves shall be used, and the relevant relay protection device shall be deactivated before work is carried out if necessary.
4.3 When connecting temporary loads, special switches and fuses must be fitted.
4.4 When the secondary circuit is energised for testing, in order to prevent reverse voltage transformation from the secondary side to the primary side, the primary fuse shall be removed in addition to disconnecting the secondary circuit.
4.5 Before the secondary circuit is energised or tested for voltage withstand, the duty officer and relevant personnel shall be notified, and someone shall be assigned to guard the site, check the circuit, and confirm that no one is working before applying pressure.
4.6 The staff checking the power failure protection and secondary circuit are not allowed to carry out any reversing operation without the permission of the duty officer.
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voltage switchgear
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