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Considerations in Use
Dear users:
To use this product correctly and reasonably and avoid unnecessary losses, please read this
instruction carefully before installation, use, circuit connection, operation and maintenance
inspection. This instruction introduces the structure, working principle, use conditions,
installation, commissioning, etc. of the automatic transfer switching device (hereinafter referred
to as the “transfer switch”), which is conducive to your correct and reasonable use of this product.
If you have any questions, please consult our company. The user shall be responsible for the
adverse consequences caused by not operating according to this instruction.
Attention:
1. Please read this instruction carefully before use, and operate in strict accordance with the
guidelines.
2. Non-professionals are prohibited from maintenance operation, otherwise it will lead to
electric shock or product damage.
3. Before energizing or configuring the product, check whether the specification of the
transfer switch meets the use requirements, and use appropriate voltage measuring
equipment to determine the voltage condition.
4. Measure the insulation resistance of the main circuit with a 500 V megger before use (the
secondary circuit must be disconnected during measurement, otherwise the intelligent
controller will be damaged), and the resistance shall not be less than 1.5 MΩ at the
ambient temperature of 20°C ± 5°C and the relative humidity of 50% ~ 70%. Otherwise,
the transfer switch shall be dried until the insulation resistance meets the specified
requirements.
5. This product has been tested for the dielectric performance according to the standard
before leaving the factory. If the retest is carried out, the controller must be removed to
avoid damage to the product.
6. Wiring must be carried out according to the phase sequence identification of the incoming
terminal of the transfer switch body, the phase sequence of the incoming terminals of the
two power supplies must be consistent, and the neutral wire must not be mistakenly
connected to the phase wire.
7. 4-pole and 2-pole transfer switches connect the neutral wires of two power supplies to the
corresponding incoming terminals of "common power supply" and "standby power supply"
respectively. 3-pole switching devices must have the neutral wires of two power supplies
connected to the corresponding auxiliary terminals. Do not share the neutral wires, and
the wiring shall be reliable, otherwise the transfer switch will not work normally.
8. The shell of the transfer switch must be reliably grounded to ensure the safety of operators.
9. Do not install the transfer switch outdoors in damp, direct sunlight, high temperature, large
vibration impact and conductive dust, otherwise the service life of the product will be
shortened or adverse reactions will be caused.
10. When the transfer switch is in the automatic transfer state, do not use the handle for
transfer operation, otherwise the control circuit will be partially damaged.
11. In the cases of the failure of common power supply and standby power supply, manual
closing is prohibited.
12. To ensure the reliability of the transfer switch, it is required to conduct the switching test
regularly to confirm that the switch works normally and ensure the continuity of power
supply for important loads.
13. Before the normal maintenance and troubleshooting of the system circuit, all power
supplies must be turned off, the switching device shall be switched to the "0" position, and
then the "No Closing" sign shall be placed in the prominent position for maintenance, so
as to avoid unnecessary property loss and personal injury.
14. When the transfer switch is in maintenance or regular inspection, please commission it in
the "Manual" mode.
15. Products that are not used for a long time shall be moisture-proof and dust-proof, and
must be commissioned according to the specified contents before use to ensure that the
transfer switch can work normally before being put into operation.
